./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4f9af400 extending candidate: java ['java'] extending candidate: /usr/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/oracle-jdk-bin-*/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/openjdk-*/bin/java ['java', '/usr/bin/java'] extending candidate: /usr/lib/jvm/java-*-openjdk-amd64/bin/java ['java', '/usr/bin/java', '/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java', '/usr/lib/jvm/java-17-openjdk-amd64/bin/java', '/usr/lib/jvm/java-11-openjdk-amd64/bin/java', '/usr/lib/jvm/java-1.17.0-openjdk-amd64/bin/java'] ['/root/.sdkman/candidates/java/21.0.5-tem/bin/java', '-Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config', '-Xmx15G', '-Xms4m', '-jar', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar', '-data', '@noDefault', '-ultimatedata', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data', '-tc', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml', '-i', '../sv-benchmarks/c/weaver/popl20-more-max-array-hom.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', '25cf9c0a16564c460f6e824f90a2df4185d2e5d2c682a221258efaf06dec8ca4'] Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-max-array-hom.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 25cf9c0a16564c460f6e824f90a2df4185d2e5d2c682a221258efaf06dec8ca4 --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-07 19:35:53,463 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-07 19:35:53,557 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-07 19:35:53,563 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-07 19:35:53,563 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-07 19:35:53,593 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-07 19:35:53,594 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-07 19:35:53,594 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-07 19:35:53,595 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-07 19:35:53,595 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-07 19:35:53,596 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-07 19:35:53,596 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-07 19:35:53,596 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-07 19:35:53,597 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-07 19:35:53,597 INFO L153 SettingsManager]: * Use SBE=true [2024-11-07 19:35:53,597 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-07 19:35:53,597 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-07 19:35:53,597 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-07 19:35:53,597 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-07 19:35:53,598 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-07 19:35:53,598 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-07 19:35:53,598 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-07 19:35:53,598 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-07 19:35:53,598 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-07 19:35:53,598 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-07 19:35:53,598 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-07 19:35:53,598 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-07 19:35:53,599 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-07 19:35:53,599 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-07 19:35:53,599 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-07 19:35:53,599 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-07 19:35:53,599 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-07 19:35:53,599 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-07 19:35:53,599 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:35:53,599 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-07 19:35:53,599 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-07 19:35:53,599 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-07 19:35:53,599 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-07 19:35:53,599 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-07 19:35:53,599 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-07 19:35:53,599 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-07 19:35:53,599 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-07 19:35:53,600 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 -> 25cf9c0a16564c460f6e824f90a2df4185d2e5d2c682a221258efaf06dec8ca4 [2024-11-07 19:35:53,883 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-07 19:35:53,893 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-07 19:35:53,895 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-07 19:35:53,896 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-07 19:35:53,896 INFO L274 PluginConnector]: CDTParser initialized [2024-11-07 19:35:53,898 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2024-11-07 19:35:55,270 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-07 19:35:55,491 INFO L384 CDTParser]: Found 1 translation units. [2024-11-07 19:35:55,492 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2024-11-07 19:35:55,498 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4feca3c7d/13bcf6c1543f4c6591033dd43538a047/FLAGfbab1b7fc [2024-11-07 19:35:55,513 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/4feca3c7d/13bcf6c1543f4c6591033dd43538a047 [2024-11-07 19:35:55,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-07 19:35:55,517 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-07 19:35:55,518 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-07 19:35:55,519 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-07 19:35:55,523 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-07 19:35:55,524 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:35:55" (1/1) ... [2024-11-07 19:35:55,524 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2393e53f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:35:55, skipping insertion in model container [2024-11-07 19:35:55,525 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:35:55" (1/1) ... [2024-11-07 19:35:55,539 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-07 19:35:55,715 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 19:35:55,717 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:35:55,726 INFO L200 MainTranslator]: Completed pre-run [2024-11-07 19:35:55,760 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:35:55,781 INFO L204 MainTranslator]: Completed translation [2024-11-07 19:35:55,782 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:35:55 WrapperNode [2024-11-07 19:35:55,782 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-07 19:35:55,783 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-07 19:35:55,783 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-07 19:35:55,784 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-07 19:35:55,790 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:35:55" (1/1) ... [2024-11-07 19:35:55,798 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:35:55" (1/1) ... [2024-11-07 19:35:55,819 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 89 [2024-11-07 19:35:55,822 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-07 19:35:55,823 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-07 19:35:55,823 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-07 19:35:55,823 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-07 19:35:55,831 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:35:55" (1/1) ... [2024-11-07 19:35:55,832 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:35:55" (1/1) ... [2024-11-07 19:35:55,838 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:35:55" (1/1) ... [2024-11-07 19:35:55,866 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 19:35:55,870 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:35:55" (1/1) ... [2024-11-07 19:35:55,870 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:35:55" (1/1) ... [2024-11-07 19:35:55,882 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:35:55" (1/1) ... [2024-11-07 19:35:55,888 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:35:55" (1/1) ... [2024-11-07 19:35:55,890 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:35:55" (1/1) ... [2024-11-07 19:35:55,894 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:35:55" (1/1) ... [2024-11-07 19:35:55,896 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-07 19:35:55,901 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-07 19:35:55,901 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-07 19:35:55,901 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-07 19:35:55,902 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:35:55" (1/1) ... [2024-11-07 19:35:55,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:35:55,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:35:55,939 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 19:35:55,946 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 19:35:55,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-07 19:35:55,967 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-07 19:35:55,967 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-07 19:35:55,967 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-07 19:35:55,967 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-07 19:35:55,967 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-07 19:35:55,967 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-07 19:35:55,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-07 19:35:55,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-07 19:35:55,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-07 19:35:55,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-07 19:35:55,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-07 19:35:55,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-07 19:35:55,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-07 19:35:55,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-07 19:35:55,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-07 19:35:55,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-07 19:35:55,969 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-07 19:35:55,970 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 19:35:56,083 INFO L238 CfgBuilder]: Building ICFG [2024-11-07 19:35:56,085 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-07 19:35:56,414 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-07 19:35:56,414 INFO L287 CfgBuilder]: Performing block encoding [2024-11-07 19:35:56,671 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-07 19:35:56,672 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-07 19:35:56,672 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:35:56 BoogieIcfgContainer [2024-11-07 19:35:56,676 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-07 19:35:56,679 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-07 19:35:56,682 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-07 19:35:56,687 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-07 19:35:56,691 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:35:55" (1/3) ... [2024-11-07 19:35:56,692 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9105918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:35:56, skipping insertion in model container [2024-11-07 19:35:56,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:35:55" (2/3) ... [2024-11-07 19:35:56,693 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9105918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:35:56, skipping insertion in model container [2024-11-07 19:35:56,693 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:35:56" (3/3) ... [2024-11-07 19:35:56,694 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array-hom.wvr.c [2024-11-07 19:35:56,709 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-07 19:35:56,709 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-11-07 19:35:56,709 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-07 19:35:56,774 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-07 19:35:56,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 50 transitions, 121 flow [2024-11-07 19:35:56,847 INFO L124 PetriNetUnfolderBase]: 4/47 cut-off events. [2024-11-07 19:35:56,849 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-07 19:35:56,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 4/47 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 103 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2024-11-07 19:35:56,852 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 50 transitions, 121 flow [2024-11-07 19:35:56,855 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 46 transitions, 110 flow [2024-11-07 19:35:56,865 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 19:35:56,879 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;@6e41d819, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 19:35:56,879 INFO L334 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2024-11-07 19:35:56,883 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 19:35:56,883 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-07 19:35:56,883 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 19:35:56,883 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:35:56,884 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:35:56,884 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:35:56,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:35:56,888 INFO L85 PathProgramCache]: Analyzing trace with hash 494854, now seen corresponding path program 1 times [2024-11-07 19:35:56,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:35:56,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953828660] [2024-11-07 19:35:56,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:35:56,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:35:56,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:35:57,160 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 19:35:57,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:35:57,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953828660] [2024-11-07 19:35:57,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953828660] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:35:57,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:35:57,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-07 19:35:57,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193681068] [2024-11-07 19:35:57,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:35:57,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:35:57,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:35:57,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:35:57,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:35:57,214 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-07 19:35:57,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 19:35:57,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:35:57,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-07 19:35:57,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:35:57,732 INFO L124 PetriNetUnfolderBase]: 1316/1930 cut-off events. [2024-11-07 19:35:57,733 INFO L125 PetriNetUnfolderBase]: For 86/86 co-relation queries the response was YES. [2024-11-07 19:35:57,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3943 conditions, 1930 events. 1316/1930 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9858 event pairs, 1060 based on Foata normal form. 1/1377 useless extension candidates. Maximal degree in co-relation 3637. Up to 1877 conditions per place. [2024-11-07 19:35:57,764 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 30 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-11-07 19:35:57,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 156 flow [2024-11-07 19:35:57,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:35:57,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:35:57,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-11-07 19:35:57,782 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44666666666666666 [2024-11-07 19:35:57,784 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 110 flow. Second operand 3 states and 67 transitions. [2024-11-07 19:35:57,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 156 flow [2024-11-07 19:35:57,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 37 transitions, 144 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-07 19:35:57,797 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 84 flow [2024-11-07 19:35:57,799 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2024-11-07 19:35:57,805 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -13 predicate places. [2024-11-07 19:35:57,806 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 84 flow [2024-11-07 19:35:57,806 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 19:35:57,806 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:35:57,806 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:35:57,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-07 19:35:57,807 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:35:57,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:35:57,808 INFO L85 PathProgramCache]: Analyzing trace with hash 494855, now seen corresponding path program 1 times [2024-11-07 19:35:57,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:35:57,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25557561] [2024-11-07 19:35:57,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:35:57,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:35:57,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:35:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:35:58,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:35:58,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25557561] [2024-11-07 19:35:58,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25557561] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:35:58,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:35:58,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:35:58,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718230380] [2024-11-07 19:35:58,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:35:58,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:35:58,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:35:58,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:35:58,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:35:58,185 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-07 19:35:58,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 19:35:58,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:35:58,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-07 19:35:58,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:35:58,514 INFO L124 PetriNetUnfolderBase]: 1317/1933 cut-off events. [2024-11-07 19:35:58,514 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-07 19:35:58,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3865 conditions, 1933 events. 1317/1933 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9817 event pairs, 1060 based on Foata normal form. 0/1379 useless extension candidates. Maximal degree in co-relation 3843. Up to 1882 conditions per place. [2024-11-07 19:35:58,532 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 32 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-11-07 19:35:58,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 164 flow [2024-11-07 19:35:58,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:35:58,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:35:58,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-11-07 19:35:58,535 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.365 [2024-11-07 19:35:58,535 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 84 flow. Second operand 4 states and 73 transitions. [2024-11-07 19:35:58,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 164 flow [2024-11-07 19:35:58,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:35:58,539 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 107 flow [2024-11-07 19:35:58,539 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-11-07 19:35:58,539 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -10 predicate places. [2024-11-07 19:35:58,540 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 107 flow [2024-11-07 19:35:58,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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 19:35:58,540 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:35:58,540 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-07 19:35:58,540 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-07 19:35:58,541 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:35:58,541 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:35:58,541 INFO L85 PathProgramCache]: Analyzing trace with hash 475570971, now seen corresponding path program 1 times [2024-11-07 19:35:58,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:35:58,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567756733] [2024-11-07 19:35:58,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:35:58,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:35:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:35:58,862 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 19:35:58,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:35:58,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567756733] [2024-11-07 19:35:58,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567756733] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:35:58,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089559549] [2024-11-07 19:35:58,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:35:58,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:35:58,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:35:58,867 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 19:35:58,869 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 19:35:58,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:35:58,947 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-07 19:35:58,952 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:35:59,015 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 19:35:59,255 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 19:35:59,256 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:35:59,395 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 19:35:59,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089559549] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:35:59,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:35:59,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-07 19:35:59,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969177486] [2024-11-07 19:35:59,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:35:59,396 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-07 19:35:59,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:35:59,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-07 19:35:59,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-07 19:35:59,436 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-07 19:35:59,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 107 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 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 19:35:59,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:35:59,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-07 19:35:59,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:35:59,930 INFO L124 PetriNetUnfolderBase]: 1317/1932 cut-off events. [2024-11-07 19:35:59,930 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-07 19:35:59,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3872 conditions, 1932 events. 1317/1932 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9863 event pairs, 1060 based on Foata normal form. 0/1378 useless extension candidates. Maximal degree in co-relation 3850. Up to 1878 conditions per place. [2024-11-07 19:35:59,945 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 28 selfloop transitions, 7 changer transitions 0/39 dead transitions. [2024-11-07 19:35:59,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 173 flow [2024-11-07 19:35:59,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:35:59,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:35:59,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-11-07 19:35:59,947 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3 [2024-11-07 19:35:59,947 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 107 flow. Second operand 6 states and 90 transitions. [2024-11-07 19:35:59,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 173 flow [2024-11-07 19:35:59,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 39 transitions, 170 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:35:59,949 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 114 flow [2024-11-07 19:35:59,949 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=114, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2024-11-07 19:35:59,949 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2024-11-07 19:35:59,950 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 114 flow [2024-11-07 19:35:59,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 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 19:35:59,950 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:35:59,950 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-07 19:35:59,972 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 19:36:00,156 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 19:36:00,156 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:00,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:00,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1859881490, now seen corresponding path program 1 times [2024-11-07 19:36:00,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:00,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31025440] [2024-11-07 19:36:00,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:00,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:00,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:00,256 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 19:36:00,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:00,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31025440] [2024-11-07 19:36:00,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31025440] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:36:00,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:36:00,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:36:00,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338200664] [2024-11-07 19:36:00,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:36:00,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:36:00,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:00,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:36:00,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:36:00,267 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-07 19:36:00,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 19:36:00,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:00,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-07 19:36:00,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:00,476 INFO L124 PetriNetUnfolderBase]: 1316/1931 cut-off events. [2024-11-07 19:36:00,476 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-07 19:36:00,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3873 conditions, 1931 events. 1316/1931 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9800 event pairs, 1060 based on Foata normal form. 1/1378 useless extension candidates. Maximal degree in co-relation 3851. Up to 1880 conditions per place. [2024-11-07 19:36:00,489 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 32 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2024-11-07 19:36:00,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 38 transitions, 176 flow [2024-11-07 19:36:00,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:36:00,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:36:00,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2024-11-07 19:36:00,491 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-11-07 19:36:00,491 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 114 flow. Second operand 3 states and 65 transitions. [2024-11-07 19:36:00,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 38 transitions, 176 flow [2024-11-07 19:36:00,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 38 transitions, 150 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-07 19:36:00,493 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 86 flow [2024-11-07 19:36:00,493 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2024-11-07 19:36:00,494 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -12 predicate places. [2024-11-07 19:36:00,494 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 86 flow [2024-11-07 19:36:00,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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 19:36:00,494 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:00,494 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:00,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-07 19:36:00,494 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:00,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:00,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1359754370, now seen corresponding path program 1 times [2024-11-07 19:36:00,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:00,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683272664] [2024-11-07 19:36:00,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:00,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:00,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:00,678 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 19:36:00,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:00,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683272664] [2024-11-07 19:36:00,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683272664] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:00,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839862279] [2024-11-07 19:36:00,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:00,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:00,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:00,682 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 19:36:00,684 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 19:36:00,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:00,748 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-07 19:36:00,750 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:00,757 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 19:36:00,836 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 19:36:00,837 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:00,924 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 19:36:00,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839862279] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:00,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-07 19:36:00,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-11-07 19:36:00,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335072687] [2024-11-07 19:36:00,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:36:00,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-07 19:36:00,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:00,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-07 19:36:00,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-07 19:36:00,951 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-07 19:36:00,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 86 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 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 19:36:00,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:00,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-07 19:36:00,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:01,319 INFO L124 PetriNetUnfolderBase]: 1814/2679 cut-off events. [2024-11-07 19:36:01,320 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-07 19:36:01,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5292 conditions, 2679 events. 1814/2679 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 14525 event pairs, 880 based on Foata normal form. 0/1942 useless extension candidates. Maximal degree in co-relation 5281. Up to 1584 conditions per place. [2024-11-07 19:36:01,335 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 47 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-11-07 19:36:01,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 236 flow [2024-11-07 19:36:01,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:36:01,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:36:01,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-11-07 19:36:01,337 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-11-07 19:36:01,339 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 86 flow. Second operand 6 states and 115 transitions. [2024-11-07 19:36:01,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 236 flow [2024-11-07 19:36:01,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 58 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:36:01,341 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 115 flow [2024-11-07 19:36:01,341 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=115, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-11-07 19:36:01,342 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2024-11-07 19:36:01,342 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 115 flow [2024-11-07 19:36:01,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 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 19:36:01,343 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:01,344 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:01,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-07 19:36:01,547 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:01,548 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:01,548 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:01,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1359754371, now seen corresponding path program 1 times [2024-11-07 19:36:01,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:01,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607072106] [2024-11-07 19:36:01,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:01,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:01,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:01,595 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 19:36:01,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:01,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607072106] [2024-11-07 19:36:01,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607072106] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:36:01,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:36:01,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:36:01,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429684083] [2024-11-07 19:36:01,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:36:01,597 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:36:01,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:01,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:36:01,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:36:01,607 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-07 19:36:01,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 115 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 19:36:01,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:01,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-07 19:36:01,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:01,759 INFO L124 PetriNetUnfolderBase]: 1001/1468 cut-off events. [2024-11-07 19:36:01,759 INFO L125 PetriNetUnfolderBase]: For 904/904 co-relation queries the response was YES. [2024-11-07 19:36:01,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3605 conditions, 1468 events. 1001/1468 cut-off events. For 904/904 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6568 event pairs, 733 based on Foata normal form. 123/1413 useless extension candidates. Maximal degree in co-relation 794. Up to 1405 conditions per place. [2024-11-07 19:36:01,769 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 31 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-11-07 19:36:01,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 175 flow [2024-11-07 19:36:01,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:36:01,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:36:01,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-11-07 19:36:01,771 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34 [2024-11-07 19:36:01,771 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 115 flow. Second operand 4 states and 68 transitions. [2024-11-07 19:36:01,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 175 flow [2024-11-07 19:36:01,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 37 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:36:01,773 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 108 flow [2024-11-07 19:36:01,773 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2024-11-07 19:36:01,774 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -10 predicate places. [2024-11-07 19:36:01,774 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 108 flow [2024-11-07 19:36:01,774 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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 19:36:01,774 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:01,774 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:01,774 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-07 19:36:01,774 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:01,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:01,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1083423898, now seen corresponding path program 1 times [2024-11-07 19:36:01,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:01,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088129301] [2024-11-07 19:36:01,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:01,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:01,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:01,882 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 19:36:01,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:01,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088129301] [2024-11-07 19:36:01,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088129301] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:01,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219664513] [2024-11-07 19:36:01,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:01,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:01,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:01,886 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 19:36:01,888 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 19:36:01,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:01,959 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-07 19:36:01,960 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:02,036 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 19:36:02,036 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:02,099 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 19:36:02,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219664513] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:36:02,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:36:02,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-07 19:36:02,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923967723] [2024-11-07 19:36:02,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:36:02,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-07 19:36:02,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:02,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-07 19:36:02,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-07 19:36:02,169 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-07 19:36:02,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 108 flow. Second operand has 13 states, 13 states have (on average 10.923076923076923) internal successors, (142), 13 states have internal predecessors, (142), 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 19:36:02,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:02,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-07 19:36:02,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:02,574 INFO L124 PetriNetUnfolderBase]: 1728/2523 cut-off events. [2024-11-07 19:36:02,574 INFO L125 PetriNetUnfolderBase]: For 1661/1661 co-relation queries the response was YES. [2024-11-07 19:36:02,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6300 conditions, 2523 events. 1728/2523 cut-off events. For 1661/1661 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 11932 event pairs, 1148 based on Foata normal form. 0/2237 useless extension candidates. Maximal degree in co-relation 4244. Up to 1681 conditions per place. [2024-11-07 19:36:02,589 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 69 selfloop transitions, 8 changer transitions 0/80 dead transitions. [2024-11-07 19:36:02,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 80 transitions, 404 flow [2024-11-07 19:36:02,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-07 19:36:02,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-07 19:36:02,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-11-07 19:36:02,591 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-11-07 19:36:02,591 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 108 flow. Second operand 7 states and 135 transitions. [2024-11-07 19:36:02,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 80 transitions, 404 flow [2024-11-07 19:36:02,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 80 transitions, 400 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:36:02,593 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 156 flow [2024-11-07 19:36:02,594 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=156, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2024-11-07 19:36:02,594 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -2 predicate places. [2024-11-07 19:36:02,594 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 156 flow [2024-11-07 19:36:02,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.923076923076923) internal successors, (142), 13 states have internal predecessors, (142), 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 19:36:02,595 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:02,595 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:02,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-07 19:36:02,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:02,795 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:02,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:02,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1689668966, now seen corresponding path program 1 times [2024-11-07 19:36:02,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:02,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127245299] [2024-11-07 19:36:02,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:02,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:02,910 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 19:36:02,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:02,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127245299] [2024-11-07 19:36:02,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127245299] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:02,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560916243] [2024-11-07 19:36:02,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:02,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:02,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:02,913 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 19:36:02,915 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 19:36:02,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:02,977 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-07 19:36:02,978 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:03,047 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 19:36:03,048 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:03,106 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 19:36:03,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560916243] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:36:03,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:36:03,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-07 19:36:03,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459141565] [2024-11-07 19:36:03,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:36:03,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-07 19:36:03,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:03,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-07 19:36:03,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-07 19:36:03,159 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-07 19:36:03,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 156 flow. Second operand has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 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 19:36:03,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:03,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-07 19:36:03,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:03,636 INFO L124 PetriNetUnfolderBase]: 1788/2621 cut-off events. [2024-11-07 19:36:03,637 INFO L125 PetriNetUnfolderBase]: For 1585/1677 co-relation queries the response was YES. [2024-11-07 19:36:03,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6793 conditions, 2621 events. 1788/2621 cut-off events. For 1585/1677 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 12682 event pairs, 1114 based on Foata normal form. 38/2421 useless extension candidates. Maximal degree in co-relation 4626. Up to 1826 conditions per place. [2024-11-07 19:36:03,658 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 74 selfloop transitions, 10 changer transitions 0/87 dead transitions. [2024-11-07 19:36:03,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 87 transitions, 456 flow [2024-11-07 19:36:03,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-07 19:36:03,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-07 19:36:03,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-11-07 19:36:03,660 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-11-07 19:36:03,660 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 156 flow. Second operand 8 states and 155 transitions. [2024-11-07 19:36:03,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 87 transitions, 456 flow [2024-11-07 19:36:03,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 87 transitions, 454 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:36:03,665 INFO L231 Difference]: Finished difference. Result has 59 places, 46 transitions, 215 flow [2024-11-07 19:36:03,665 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=215, PETRI_PLACES=59, PETRI_TRANSITIONS=46} [2024-11-07 19:36:03,667 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 7 predicate places. [2024-11-07 19:36:03,667 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 46 transitions, 215 flow [2024-11-07 19:36:03,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 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 19:36:03,667 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:03,668 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:03,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-07 19:36:03,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-07 19:36:03,869 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:03,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:03,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1823740779, now seen corresponding path program 1 times [2024-11-07 19:36:03,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:03,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547125047] [2024-11-07 19:36:03,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:03,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:03,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:04,076 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 19:36:04,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:04,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547125047] [2024-11-07 19:36:04,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547125047] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:04,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754266935] [2024-11-07 19:36:04,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:04,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:04,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:04,080 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 19:36:04,081 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 19:36:04,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:04,150 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-07 19:36:04,152 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:04,283 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 19:36:04,283 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-07 19:36:04,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754266935] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:36:04,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-07 19:36:04,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2024-11-07 19:36:04,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382907376] [2024-11-07 19:36:04,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:36:04,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-07 19:36:04,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:04,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-07 19:36:04,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-07 19:36:04,320 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-07 19:36:04,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 46 transitions, 215 flow. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:04,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:04,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-07 19:36:04,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:04,656 INFO L124 PetriNetUnfolderBase]: 2001/3062 cut-off events. [2024-11-07 19:36:04,657 INFO L125 PetriNetUnfolderBase]: For 4359/4426 co-relation queries the response was YES. [2024-11-07 19:36:04,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8678 conditions, 3062 events. 2001/3062 cut-off events. For 4359/4426 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 15779 event pairs, 1077 based on Foata normal form. 0/2835 useless extension candidates. Maximal degree in co-relation 5665. Up to 2134 conditions per place. [2024-11-07 19:36:04,678 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 60 selfloop transitions, 6 changer transitions 0/70 dead transitions. [2024-11-07 19:36:04,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 70 transitions, 469 flow [2024-11-07 19:36:04,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:36:04,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:36:04,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-11-07 19:36:04,680 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.384 [2024-11-07 19:36:04,680 INFO L175 Difference]: Start difference. First operand has 59 places, 46 transitions, 215 flow. Second operand 5 states and 96 transitions. [2024-11-07 19:36:04,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 70 transitions, 469 flow [2024-11-07 19:36:04,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 70 transitions, 454 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-07 19:36:04,690 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 227 flow [2024-11-07 19:36:04,690 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=227, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2024-11-07 19:36:04,691 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 8 predicate places. [2024-11-07 19:36:04,691 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 227 flow [2024-11-07 19:36:04,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:04,692 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:04,692 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:04,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-07 19:36:04,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:04,894 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:04,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:04,894 INFO L85 PathProgramCache]: Analyzing trace with hash -848433454, now seen corresponding path program 2 times [2024-11-07 19:36:04,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:04,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108167231] [2024-11-07 19:36:04,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:04,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:04,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:05,076 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:36:05,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:05,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108167231] [2024-11-07 19:36:05,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108167231] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:05,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750683049] [2024-11-07 19:36:05,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:36:05,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:05,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:05,079 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 19:36:05,081 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 19:36:05,145 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-07 19:36:05,145 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:36:05,147 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-07 19:36:05,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:05,165 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 19:36:05,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:36:05,347 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-07 19:36:05,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750683049] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:36:05,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-07 19:36:05,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2024-11-07 19:36:05,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306330641] [2024-11-07 19:36:05,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:36:05,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-07 19:36:05,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:05,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-07 19:36:05,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-11-07 19:36:05,378 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-07 19:36:05,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 227 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:05,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:05,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-07 19:36:05,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:05,752 INFO L124 PetriNetUnfolderBase]: 2001/2943 cut-off events. [2024-11-07 19:36:05,752 INFO L125 PetriNetUnfolderBase]: For 4918/4976 co-relation queries the response was YES. [2024-11-07 19:36:05,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9325 conditions, 2943 events. 2001/2943 cut-off events. For 4918/4976 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13711 event pairs, 544 based on Foata normal form. 0/2825 useless extension candidates. Maximal degree in co-relation 6098. Up to 1268 conditions per place. [2024-11-07 19:36:05,771 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 75 selfloop transitions, 9 changer transitions 0/87 dead transitions. [2024-11-07 19:36:05,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 87 transitions, 595 flow [2024-11-07 19:36:05,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:36:05,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:36:05,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-11-07 19:36:05,773 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37333333333333335 [2024-11-07 19:36:05,773 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 227 flow. Second operand 6 states and 112 transitions. [2024-11-07 19:36:05,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 87 transitions, 595 flow [2024-11-07 19:36:05,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 87 transitions, 580 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:36:05,779 INFO L231 Difference]: Finished difference. Result has 61 places, 47 transitions, 234 flow [2024-11-07 19:36:05,779 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=234, PETRI_PLACES=61, PETRI_TRANSITIONS=47} [2024-11-07 19:36:05,780 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 9 predicate places. [2024-11-07 19:36:05,780 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 47 transitions, 234 flow [2024-11-07 19:36:05,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:05,780 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:05,780 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:05,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-07 19:36:05,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-07 19:36:05,981 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:05,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:05,982 INFO L85 PathProgramCache]: Analyzing trace with hash 384438138, now seen corresponding path program 2 times [2024-11-07 19:36:05,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:05,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690710666] [2024-11-07 19:36:05,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:05,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:05,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:06,221 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 19:36:06,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:06,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690710666] [2024-11-07 19:36:06,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690710666] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:06,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702117808] [2024-11-07 19:36:06,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:36:06,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:06,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:06,225 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 19:36:06,227 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 19:36:06,292 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:36:06,293 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:36:06,294 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-07 19:36:06,295 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:06,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:36:06,410 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:06,502 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 24 treesize of output 20 [2024-11-07 19:36:06,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:36:06,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702117808] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:36:06,554 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:36:06,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-07 19:36:06,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871330991] [2024-11-07 19:36:06,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:36:06,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-07 19:36:06,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:06,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-07 19:36:06,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2024-11-07 19:36:06,652 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-07 19:36:06,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 47 transitions, 234 flow. Second operand has 18 states, 18 states have (on average 11.666666666666666) internal successors, (210), 18 states have internal predecessors, (210), 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 19:36:06,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:06,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-07 19:36:06,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:07,422 INFO L124 PetriNetUnfolderBase]: 2288/3429 cut-off events. [2024-11-07 19:36:07,422 INFO L125 PetriNetUnfolderBase]: For 5539/5731 co-relation queries the response was YES. [2024-11-07 19:36:07,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11199 conditions, 3429 events. 2288/3429 cut-off events. For 5539/5731 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16731 event pairs, 810 based on Foata normal form. 66/3478 useless extension candidates. Maximal degree in co-relation 7870. Up to 1167 conditions per place. [2024-11-07 19:36:07,445 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 113 selfloop transitions, 14 changer transitions 0/131 dead transitions. [2024-11-07 19:36:07,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 131 transitions, 794 flow [2024-11-07 19:36:07,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-07 19:36:07,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-07 19:36:07,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-11-07 19:36:07,447 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43 [2024-11-07 19:36:07,448 INFO L175 Difference]: Start difference. First operand has 61 places, 47 transitions, 234 flow. Second operand 10 states and 215 transitions. [2024-11-07 19:36:07,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 131 transitions, 794 flow [2024-11-07 19:36:07,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 131 transitions, 754 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-07 19:36:07,463 INFO L231 Difference]: Finished difference. Result has 68 places, 52 transitions, 298 flow [2024-11-07 19:36:07,463 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=298, PETRI_PLACES=68, PETRI_TRANSITIONS=52} [2024-11-07 19:36:07,464 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 16 predicate places. [2024-11-07 19:36:07,465 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 52 transitions, 298 flow [2024-11-07 19:36:07,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.666666666666666) internal successors, (210), 18 states have internal predecessors, (210), 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 19:36:07,465 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:07,465 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:07,483 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 19:36:07,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:07,670 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:07,670 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:07,670 INFO L85 PathProgramCache]: Analyzing trace with hash 275334849, now seen corresponding path program 1 times [2024-11-07 19:36:07,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:07,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227701074] [2024-11-07 19:36:07,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:07,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:07,780 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 19:36:07,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:07,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227701074] [2024-11-07 19:36:07,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227701074] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:07,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360757212] [2024-11-07 19:36:07,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:07,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:07,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:07,784 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 19:36:07,785 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 19:36:07,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:07,853 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-07 19:36:07,854 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:07,958 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 19:36:07,958 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:08,021 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 19:36:08,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360757212] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:36:08,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:36:08,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-07 19:36:08,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793701749] [2024-11-07 19:36:08,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:36:08,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-07 19:36:08,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:08,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-07 19:36:08,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-11-07 19:36:08,064 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-07 19:36:08,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 52 transitions, 298 flow. Second operand has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 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 19:36:08,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:08,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-07 19:36:08,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:08,598 INFO L124 PetriNetUnfolderBase]: 2593/3691 cut-off events. [2024-11-07 19:36:08,599 INFO L125 PetriNetUnfolderBase]: For 10516/10810 co-relation queries the response was YES. [2024-11-07 19:36:08,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12836 conditions, 3691 events. 2593/3691 cut-off events. For 10516/10810 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 16337 event pairs, 1665 based on Foata normal form. 34/3719 useless extension candidates. Maximal degree in co-relation 10063. Up to 2894 conditions per place. [2024-11-07 19:36:08,626 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 75 selfloop transitions, 10 changer transitions 0/88 dead transitions. [2024-11-07 19:36:08,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 88 transitions, 646 flow [2024-11-07 19:36:08,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-07 19:36:08,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-07 19:36:08,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-11-07 19:36:08,627 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3675 [2024-11-07 19:36:08,628 INFO L175 Difference]: Start difference. First operand has 68 places, 52 transitions, 298 flow. Second operand 8 states and 147 transitions. [2024-11-07 19:36:08,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 88 transitions, 646 flow [2024-11-07 19:36:08,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 88 transitions, 591 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-07 19:36:08,637 INFO L231 Difference]: Finished difference. Result has 72 places, 56 transitions, 316 flow [2024-11-07 19:36:08,637 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=316, PETRI_PLACES=72, PETRI_TRANSITIONS=56} [2024-11-07 19:36:08,638 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 20 predicate places. [2024-11-07 19:36:08,638 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 56 transitions, 316 flow [2024-11-07 19:36:08,638 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 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 19:36:08,638 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:08,638 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-07 19:36:08,656 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 19:36:08,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:08,839 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:08,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:08,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1880639510, now seen corresponding path program 3 times [2024-11-07 19:36:08,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:08,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330863273] [2024-11-07 19:36:08,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:08,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:08,956 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:36:08,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:08,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330863273] [2024-11-07 19:36:08,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330863273] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:08,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908029208] [2024-11-07 19:36:08,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-07 19:36:08,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:08,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:08,959 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 19:36:08,961 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 19:36:09,021 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-07 19:36:09,022 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:36:09,023 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-07 19:36:09,024 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:09,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:36:09,148 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:09,337 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 13 treesize of output 11 [2024-11-07 19:36:09,348 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:36:09,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908029208] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:36:09,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:36:09,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 19 [2024-11-07 19:36:09,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127149227] [2024-11-07 19:36:09,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:36:09,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-07 19:36:09,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:09,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-07 19:36:09,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2024-11-07 19:36:09,535 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-07 19:36:09,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 56 transitions, 316 flow. Second operand has 20 states, 20 states have (on average 11.05) internal successors, (221), 20 states have internal predecessors, (221), 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 19:36:09,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:09,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-07 19:36:09,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:10,752 INFO L124 PetriNetUnfolderBase]: 4150/5930 cut-off events. [2024-11-07 19:36:10,753 INFO L125 PetriNetUnfolderBase]: For 6918/7326 co-relation queries the response was YES. [2024-11-07 19:36:10,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19651 conditions, 5930 events. 4150/5930 cut-off events. For 6918/7326 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 29501 event pairs, 894 based on Foata normal form. 132/6056 useless extension candidates. Maximal degree in co-relation 10459. Up to 1101 conditions per place. [2024-11-07 19:36:10,788 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 206 selfloop transitions, 27 changer transitions 0/236 dead transitions. [2024-11-07 19:36:10,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 236 transitions, 1542 flow [2024-11-07 19:36:10,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-07 19:36:10,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-07 19:36:10,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 327 transitions. [2024-11-07 19:36:10,790 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40875 [2024-11-07 19:36:10,791 INFO L175 Difference]: Start difference. First operand has 72 places, 56 transitions, 316 flow. Second operand 16 states and 327 transitions. [2024-11-07 19:36:10,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 236 transitions, 1542 flow [2024-11-07 19:36:10,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 236 transitions, 1519 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-07 19:36:10,810 INFO L231 Difference]: Finished difference. Result has 88 places, 66 transitions, 472 flow [2024-11-07 19:36:10,810 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=472, PETRI_PLACES=88, PETRI_TRANSITIONS=66} [2024-11-07 19:36:10,811 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 36 predicate places. [2024-11-07 19:36:10,811 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 66 transitions, 472 flow [2024-11-07 19:36:10,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.05) internal successors, (221), 20 states have internal predecessors, (221), 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 19:36:10,811 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:10,812 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:10,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-07 19:36:11,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:11,016 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:11,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:11,016 INFO L85 PathProgramCache]: Analyzing trace with hash 537255637, now seen corresponding path program 2 times [2024-11-07 19:36:11,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:11,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987932010] [2024-11-07 19:36:11,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:11,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:11,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:11,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:36:11,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:11,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987932010] [2024-11-07 19:36:11,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987932010] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:11,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076308593] [2024-11-07 19:36:11,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:36:11,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:11,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:11,240 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 19:36:11,242 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 19:36:11,314 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:36:11,314 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:36:11,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-07 19:36:11,317 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:11,508 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:36:11,509 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:11,798 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 35 treesize of output 31 [2024-11-07 19:36:11,852 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 19:36:11,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076308593] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:36:11,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:36:11,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2024-11-07 19:36:11,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534634957] [2024-11-07 19:36:11,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:36:11,853 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-07 19:36:11,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:11,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-07 19:36:11,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2024-11-07 19:36:12,027 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-07 19:36:12,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 66 transitions, 472 flow. Second operand has 19 states, 19 states have (on average 11.368421052631579) internal successors, (216), 19 states have internal predecessors, (216), 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 19:36:12,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:12,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-07 19:36:12,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:12,831 INFO L124 PetriNetUnfolderBase]: 3656/5220 cut-off events. [2024-11-07 19:36:12,831 INFO L125 PetriNetUnfolderBase]: For 18198/18588 co-relation queries the response was YES. [2024-11-07 19:36:12,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20141 conditions, 5220 events. 3656/5220 cut-off events. For 18198/18588 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 25159 event pairs, 781 based on Foata normal form. 130/5345 useless extension candidates. Maximal degree in co-relation 10782. Up to 1731 conditions per place. [2024-11-07 19:36:12,875 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 134 selfloop transitions, 14 changer transitions 0/153 dead transitions. [2024-11-07 19:36:12,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 153 transitions, 1513 flow [2024-11-07 19:36:12,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-07 19:36:12,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-07 19:36:12,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-11-07 19:36:12,877 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3657142857142857 [2024-11-07 19:36:12,877 INFO L175 Difference]: Start difference. First operand has 88 places, 66 transitions, 472 flow. Second operand 7 states and 128 transitions. [2024-11-07 19:36:12,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 153 transitions, 1513 flow [2024-11-07 19:36:12,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 153 transitions, 1416 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-11-07 19:36:12,904 INFO L231 Difference]: Finished difference. Result has 90 places, 66 transitions, 475 flow [2024-11-07 19:36:12,905 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=475, PETRI_PLACES=90, PETRI_TRANSITIONS=66} [2024-11-07 19:36:12,905 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 38 predicate places. [2024-11-07 19:36:12,905 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 66 transitions, 475 flow [2024-11-07 19:36:12,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 11.368421052631579) internal successors, (216), 19 states have internal predecessors, (216), 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 19:36:12,906 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:12,906 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 19:36:12,924 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 19:36:13,109 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,SelfDestructingSolverStorable13 [2024-11-07 19:36:13,110 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:13,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:13,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1902583205, now seen corresponding path program 1 times [2024-11-07 19:36:13,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:13,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586507889] [2024-11-07 19:36:13,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:13,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:13,188 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 19:36:13,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:13,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586507889] [2024-11-07 19:36:13,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586507889] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:13,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771345174] [2024-11-07 19:36:13,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:13,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:13,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:13,191 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 19:36:13,193 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 19:36:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:13,277 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-07 19:36:13,278 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:13,312 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 19:36:13,313 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:13,346 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 19:36:13,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771345174] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:13,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-07 19:36:13,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-07 19:36:13,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800874643] [2024-11-07 19:36:13,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:36:13,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:36:13,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:13,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:36:13,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-07 19:36:13,357 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-07 19:36:13,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 66 transitions, 475 flow. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:13,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:13,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-07 19:36:13,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:13,699 INFO L124 PetriNetUnfolderBase]: 3554/5162 cut-off events. [2024-11-07 19:36:13,699 INFO L125 PetriNetUnfolderBase]: For 13728/14058 co-relation queries the response was YES. [2024-11-07 19:36:13,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19734 conditions, 5162 events. 3554/5162 cut-off events. For 13728/14058 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 26021 event pairs, 1102 based on Foata normal form. 154/5302 useless extension candidates. Maximal degree in co-relation 11206. Up to 2793 conditions per place. [2024-11-07 19:36:13,741 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 67 selfloop transitions, 13 changer transitions 0/84 dead transitions. [2024-11-07 19:36:13,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 84 transitions, 721 flow [2024-11-07 19:36:13,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:36:13,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:36:13,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-11-07 19:36:13,742 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.352 [2024-11-07 19:36:13,742 INFO L175 Difference]: Start difference. First operand has 90 places, 66 transitions, 475 flow. Second operand 5 states and 88 transitions. [2024-11-07 19:36:13,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 84 transitions, 721 flow [2024-11-07 19:36:13,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 84 transitions, 648 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-07 19:36:13,781 INFO L231 Difference]: Finished difference. Result has 86 places, 63 transitions, 417 flow [2024-11-07 19:36:13,781 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=391, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=417, PETRI_PLACES=86, PETRI_TRANSITIONS=63} [2024-11-07 19:36:13,782 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 34 predicate places. [2024-11-07 19:36:13,782 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 63 transitions, 417 flow [2024-11-07 19:36:13,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:13,782 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:13,783 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:13,801 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 19:36:13,986 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,SelfDestructingSolverStorable14 [2024-11-07 19:36:13,987 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:13,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:13,988 INFO L85 PathProgramCache]: Analyzing trace with hash -821354225, now seen corresponding path program 1 times [2024-11-07 19:36:13,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:13,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942096347] [2024-11-07 19:36:13,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:13,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:13,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:14,038 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 19:36:14,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:14,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942096347] [2024-11-07 19:36:14,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942096347] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:14,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766920253] [2024-11-07 19:36:14,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:14,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:14,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:14,042 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 19:36:14,044 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 19:36:14,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:14,120 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-07 19:36:14,122 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:14,183 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 19:36:14,183 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:14,210 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 19:36:14,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766920253] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:36:14,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:36:14,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-11-07 19:36:14,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573821135] [2024-11-07 19:36:14,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:36:14,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-07 19:36:14,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:14,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-07 19:36:14,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-07 19:36:14,223 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-07 19:36:14,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 63 transitions, 417 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 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 19:36:14,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:14,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-07 19:36:14,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:14,508 INFO L124 PetriNetUnfolderBase]: 3300/4868 cut-off events. [2024-11-07 19:36:14,509 INFO L125 PetriNetUnfolderBase]: For 14632/14946 co-relation queries the response was YES. [2024-11-07 19:36:14,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17740 conditions, 4868 events. 3300/4868 cut-off events. For 14632/14946 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 24792 event pairs, 1116 based on Foata normal form. 164/4897 useless extension candidates. Maximal degree in co-relation 12918. Up to 2577 conditions per place. [2024-11-07 19:36:14,532 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 75 selfloop transitions, 9 changer transitions 0/89 dead transitions. [2024-11-07 19:36:14,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 89 transitions, 789 flow [2024-11-07 19:36:14,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:36:14,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:36:14,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-11-07 19:36:14,533 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38 [2024-11-07 19:36:14,533 INFO L175 Difference]: Start difference. First operand has 86 places, 63 transitions, 417 flow. Second operand 4 states and 76 transitions. [2024-11-07 19:36:14,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 89 transitions, 789 flow [2024-11-07 19:36:14,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 89 transitions, 745 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-07 19:36:14,558 INFO L231 Difference]: Finished difference. Result has 85 places, 61 transitions, 397 flow [2024-11-07 19:36:14,558 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=397, PETRI_PLACES=85, PETRI_TRANSITIONS=61} [2024-11-07 19:36:14,559 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 33 predicate places. [2024-11-07 19:36:14,559 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 61 transitions, 397 flow [2024-11-07 19:36:14,559 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 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 19:36:14,559 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:14,559 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:14,577 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 19:36:14,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:14,760 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:14,760 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:14,760 INFO L85 PathProgramCache]: Analyzing trace with hash 263734697, now seen corresponding path program 1 times [2024-11-07 19:36:14,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:14,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553849129] [2024-11-07 19:36:14,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:14,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:15,278 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 19:36:15,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:15,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553849129] [2024-11-07 19:36:15,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553849129] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:15,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084589906] [2024-11-07 19:36:15,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:15,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:15,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:15,281 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 19:36:15,283 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 19:36:15,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:15,367 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-07 19:36:15,369 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:15,413 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 19:36:15,841 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 85 treesize of output 61 [2024-11-07 19:36:15,845 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 61 treesize of output 57 [2024-11-07 19:36:15,850 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 57 treesize of output 53 [2024-11-07 19:36:15,956 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 19:36:15,956 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:16,511 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 177 treesize of output 173 [2024-11-07 19:36:16,514 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 173 treesize of output 169 [2024-11-07 19:36:17,730 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 203 treesize of output 187 [2024-11-07 19:36:17,780 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:36:17,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 235 treesize of output 239 [2024-11-07 19:36:23,613 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 229 treesize of output 205 [2024-11-07 19:36:23,654 INFO L349 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2024-11-07 19:36:23,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 311 treesize of output 271 [2024-11-07 19:36:23,880 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 109 treesize of output 99 [2024-11-07 19:36:23,889 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-07 19:36:23,889 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 128 treesize of output 118 [2024-11-07 19:36:24,362 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 19:36:24,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084589906] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:36:24,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:36:24,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2024-11-07 19:36:24,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210902975] [2024-11-07 19:36:24,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:36:24,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-07 19:36:24,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:24,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-07 19:36:24,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2024-11-07 19:36:24,750 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-07 19:36:24,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 61 transitions, 397 flow. Second operand has 24 states, 24 states have (on average 13.0) internal successors, (312), 24 states have internal predecessors, (312), 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 19:36:24,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:24,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-07 19:36:24,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:26,370 INFO L124 PetriNetUnfolderBase]: 2829/4404 cut-off events. [2024-11-07 19:36:26,370 INFO L125 PetriNetUnfolderBase]: For 11035/11297 co-relation queries the response was YES. [2024-11-07 19:36:26,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16013 conditions, 4404 events. 2829/4404 cut-off events. For 11035/11297 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 23492 event pairs, 585 based on Foata normal form. 1/4401 useless extension candidates. Maximal degree in co-relation 11266. Up to 3462 conditions per place. [2024-11-07 19:36:26,390 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 82 selfloop transitions, 18 changer transitions 47/154 dead transitions. [2024-11-07 19:36:26,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 154 transitions, 1139 flow [2024-11-07 19:36:26,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-07 19:36:26,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-07 19:36:26,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 284 transitions. [2024-11-07 19:36:26,391 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.355 [2024-11-07 19:36:26,392 INFO L175 Difference]: Start difference. First operand has 85 places, 61 transitions, 397 flow. Second operand 16 states and 284 transitions. [2024-11-07 19:36:26,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 154 transitions, 1139 flow [2024-11-07 19:36:26,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 154 transitions, 1109 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:36:26,420 INFO L231 Difference]: Finished difference. Result has 107 places, 72 transitions, 515 flow [2024-11-07 19:36:26,420 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=515, PETRI_PLACES=107, PETRI_TRANSITIONS=72} [2024-11-07 19:36:26,421 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 55 predicate places. [2024-11-07 19:36:26,421 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 72 transitions, 515 flow [2024-11-07 19:36:26,421 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 13.0) internal successors, (312), 24 states have internal predecessors, (312), 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 19:36:26,421 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:26,421 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:26,438 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 19:36:26,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-07 19:36:26,626 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:26,626 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:26,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1702569495, now seen corresponding path program 2 times [2024-11-07 19:36:26,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:26,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619637336] [2024-11-07 19:36:26,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:26,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:26,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:27,088 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 19:36:27,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:27,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619637336] [2024-11-07 19:36:27,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619637336] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:27,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704095202] [2024-11-07 19:36:27,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:36:27,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:27,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:27,090 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 19:36:27,091 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 19:36:27,154 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:36:27,154 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:36:27,155 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-07 19:36:27,156 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:27,178 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 19:36:27,436 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 75 treesize of output 51 [2024-11-07 19:36:27,439 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 51 treesize of output 47 [2024-11-07 19:36:27,441 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 47 treesize of output 43 [2024-11-07 19:36:27,494 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 19:36:27,494 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:27,783 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 177 treesize of output 173 [2024-11-07 19:36:27,786 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 173 treesize of output 169 [2024-11-07 19:36:29,267 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 109 treesize of output 99 [2024-11-07 19:36:29,279 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:36:29,280 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 128 treesize of output 122 [2024-11-07 19:36:29,637 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 229 treesize of output 205 [2024-11-07 19:36:29,651 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-11-07 19:36:29,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 311 treesize of output 1 [2024-11-07 19:36:29,657 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 203 treesize of output 187 [2024-11-07 19:36:29,702 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:36:29,702 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 235 treesize of output 239 [2024-11-07 19:36:33,289 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 19:36:33,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704095202] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:36:33,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:36:33,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-11-07 19:36:33,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824793986] [2024-11-07 19:36:33,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:36:33,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-07 19:36:33,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:33,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-07 19:36:33,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2024-11-07 19:36:33,582 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-07 19:36:33,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 72 transitions, 515 flow. Second operand has 23 states, 23 states have (on average 13.043478260869565) internal successors, (300), 23 states have internal predecessors, (300), 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 19:36:33,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:33,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-07 19:36:33,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:35,462 INFO L124 PetriNetUnfolderBase]: 2872/4483 cut-off events. [2024-11-07 19:36:35,462 INFO L125 PetriNetUnfolderBase]: For 12383/12675 co-relation queries the response was YES. [2024-11-07 19:36:35,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17133 conditions, 4483 events. 2872/4483 cut-off events. For 12383/12675 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 23957 event pairs, 551 based on Foata normal form. 13/4491 useless extension candidates. Maximal degree in co-relation 17091. Up to 3538 conditions per place. [2024-11-07 19:36:35,483 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 92 selfloop transitions, 26 changer transitions 35/160 dead transitions. [2024-11-07 19:36:35,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 160 transitions, 1370 flow [2024-11-07 19:36:35,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-07 19:36:35,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-07 19:36:35,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 318 transitions. [2024-11-07 19:36:35,485 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33473684210526317 [2024-11-07 19:36:35,485 INFO L175 Difference]: Start difference. First operand has 107 places, 72 transitions, 515 flow. Second operand 19 states and 318 transitions. [2024-11-07 19:36:35,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 160 transitions, 1370 flow [2024-11-07 19:36:35,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 160 transitions, 1323 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-11-07 19:36:35,508 INFO L231 Difference]: Finished difference. Result has 118 places, 82 transitions, 680 flow [2024-11-07 19:36:35,509 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=680, PETRI_PLACES=118, PETRI_TRANSITIONS=82} [2024-11-07 19:36:35,509 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 66 predicate places. [2024-11-07 19:36:35,509 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 82 transitions, 680 flow [2024-11-07 19:36:35,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 13.043478260869565) internal successors, (300), 23 states have internal predecessors, (300), 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 19:36:35,509 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:35,509 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:35,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-07 19:36:35,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-07 19:36:35,710 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:35,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:35,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1754894585, now seen corresponding path program 3 times [2024-11-07 19:36:35,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:35,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909749370] [2024-11-07 19:36:35,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:35,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:35,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:36,145 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 19:36:36,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:36,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909749370] [2024-11-07 19:36:36,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909749370] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:36,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236252460] [2024-11-07 19:36:36,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-07 19:36:36,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:36,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:36,148 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 19:36:36,150 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 19:36:36,216 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-07 19:36:36,216 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:36:36,217 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-07 19:36:36,219 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:36,244 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 19:36:36,485 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 75 treesize of output 51 [2024-11-07 19:36:36,487 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 51 treesize of output 47 [2024-11-07 19:36:36,488 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 47 treesize of output 43 [2024-11-07 19:36:36,521 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 19:36:36,521 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:36,724 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 177 treesize of output 173 [2024-11-07 19:36:36,726 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 173 treesize of output 169 [2024-11-07 19:36:38,181 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 294 treesize of output 264 [2024-11-07 19:36:38,225 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:36:38,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 387 treesize of output 389 [2024-11-07 19:36:56,295 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 246 treesize of output 228 [2024-11-07 19:36:56,347 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:36:56,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 281 treesize of output 311 [2024-11-07 19:37:15,769 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 19:37:15,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236252460] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:37:15,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:37:15,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2024-11-07 19:37:15,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102684994] [2024-11-07 19:37:15,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:37:15,770 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-07 19:37:15,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:37:15,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-07 19:37:15,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2024-11-07 19:37:16,010 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-07 19:37:16,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 82 transitions, 680 flow. Second operand has 22 states, 22 states have (on average 12.909090909090908) internal successors, (284), 22 states have internal predecessors, (284), 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 19:37:16,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:37:16,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-07 19:37:16,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:37:18,008 INFO L124 PetriNetUnfolderBase]: 2844/4449 cut-off events. [2024-11-07 19:37:18,008 INFO L125 PetriNetUnfolderBase]: For 13074/13361 co-relation queries the response was YES. [2024-11-07 19:37:18,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17253 conditions, 4449 events. 2844/4449 cut-off events. For 13074/13361 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 23985 event pairs, 529 based on Foata normal form. 1/4443 useless extension candidates. Maximal degree in co-relation 17204. Up to 3440 conditions per place. [2024-11-07 19:37:18,030 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 107 selfloop transitions, 23 changer transitions 38/175 dead transitions. [2024-11-07 19:37:18,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 175 transitions, 1554 flow [2024-11-07 19:37:18,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-07 19:37:18,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-07 19:37:18,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 338 transitions. [2024-11-07 19:37:18,032 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.338 [2024-11-07 19:37:18,032 INFO L175 Difference]: Start difference. First operand has 118 places, 82 transitions, 680 flow. Second operand 20 states and 338 transitions. [2024-11-07 19:37:18,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 175 transitions, 1554 flow [2024-11-07 19:37:18,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 175 transitions, 1457 flow, removed 26 selfloop flow, removed 12 redundant places. [2024-11-07 19:37:18,059 INFO L231 Difference]: Finished difference. Result has 123 places, 83 transitions, 705 flow [2024-11-07 19:37:18,059 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=705, PETRI_PLACES=123, PETRI_TRANSITIONS=83} [2024-11-07 19:37:18,060 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 71 predicate places. [2024-11-07 19:37:18,060 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 83 transitions, 705 flow [2024-11-07 19:37:18,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 12.909090909090908) internal successors, (284), 22 states have internal predecessors, (284), 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 19:37:18,060 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:37:18,060 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:37:18,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-07 19:37:18,260 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:37:18,261 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:37:18,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:37:18,261 INFO L85 PathProgramCache]: Analyzing trace with hash 78084357, now seen corresponding path program 4 times [2024-11-07 19:37:18,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:37:18,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331659287] [2024-11-07 19:37:18,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:37:18,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:37:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:37:18,698 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 19:37:18,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:37:18,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331659287] [2024-11-07 19:37:18,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331659287] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:37:18,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593823442] [2024-11-07 19:37:18,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-07 19:37:18,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:37:18,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:37:18,703 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 19:37:18,704 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 19:37:18,790 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-07 19:37:18,790 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:37:18,791 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-07 19:37:18,793 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:37:18,833 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 19:37:19,129 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 75 treesize of output 51 [2024-11-07 19:37:19,132 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 51 treesize of output 47 [2024-11-07 19:37:19,134 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 47 treesize of output 43 [2024-11-07 19:37:19,172 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 19:37:19,172 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:37:19,341 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 169 treesize of output 165 [2024-11-07 19:37:19,343 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 165 treesize of output 161 [2024-11-07 19:37:20,723 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 76 treesize of output 66 [2024-11-07 19:37:20,725 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 93 treesize of output 83 [2024-11-07 19:37:20,755 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 101 treesize of output 91 [2024-11-07 19:37:20,757 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 122 treesize of output 112 [2024-11-07 19:37:20,846 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 19:37:20,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593823442] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:37:20,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:37:20,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 9] total 24 [2024-11-07 19:37:20,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431325012] [2024-11-07 19:37:20,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:37:20,847 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-07 19:37:20,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:37:20,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-07 19:37:20,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600