./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-word-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4f9af400 extending candidate: java ['java'] extending candidate: /usr/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/oracle-jdk-bin-*/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/openjdk-*/bin/java ['java', '/usr/bin/java'] extending candidate: /usr/lib/jvm/java-*-openjdk-amd64/bin/java ['java', '/usr/bin/java', '/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java', '/usr/lib/jvm/java-17-openjdk-amd64/bin/java', '/usr/lib/jvm/java-11-openjdk-amd64/bin/java', '/usr/lib/jvm/java-1.17.0-openjdk-amd64/bin/java'] ['/root/.sdkman/candidates/java/21.0.5-tem/bin/java', '-Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config', '-Xmx15G', '-Xms4m', '-jar', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar', '-data', '@noDefault', '-ultimatedata', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data', '-tc', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml', '-i', '../sv-benchmarks/c/weaver/chl-word-subst.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', '1c6ecf58df9dd6f4f380af0d7ef563f293bde5430d47e04b9ba5ac44168fc198'] Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/chl-word-subst.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 1c6ecf58df9dd6f4f380af0d7ef563f293bde5430d47e04b9ba5ac44168fc198 --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-07 19:30:40,392 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-07 19:30:40,477 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-07 19:30:40,488 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-07 19:30:40,488 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-07 19:30:40,516 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-07 19:30:40,521 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-07 19:30:40,522 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-07 19:30:40,522 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-07 19:30:40,522 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-07 19:30:40,523 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-07 19:30:40,523 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-07 19:30:40,523 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-07 19:30:40,523 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-07 19:30:40,524 INFO L153 SettingsManager]: * Use SBE=true [2024-11-07 19:30:40,524 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-07 19:30:40,524 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-07 19:30:40,524 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-07 19:30:40,527 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-07 19:30:40,527 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-07 19:30:40,528 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-07 19:30:40,528 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-07 19:30:40,528 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-07 19:30:40,528 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-07 19:30:40,528 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-07 19:30:40,528 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-07 19:30:40,528 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-07 19:30:40,528 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-07 19:30:40,528 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-07 19:30:40,529 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-07 19:30:40,529 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-07 19:30:40,529 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-07 19:30:40,529 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-07 19:30:40,532 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:30:40,532 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-07 19:30:40,532 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-07 19:30:40,532 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-07 19:30:40,532 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-07 19:30:40,532 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-07 19:30:40,532 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-07 19:30:40,532 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-07 19:30:40,532 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-07 19:30:40,532 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 -> 1c6ecf58df9dd6f4f380af0d7ef563f293bde5430d47e04b9ba5ac44168fc198 [2024-11-07 19:30:40,816 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-07 19:30:40,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-07 19:30:40,826 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-07 19:30:40,831 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-07 19:30:40,831 INFO L274 PluginConnector]: CDTParser initialized [2024-11-07 19:30:40,832 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2024-11-07 19:30:41,979 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-07 19:30:42,167 INFO L384 CDTParser]: Found 1 translation units. [2024-11-07 19:30:42,167 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-subst.wvr.c [2024-11-07 19:30:42,175 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/429637166/7f1aad305c5b4503a6bc319f4b7a5364/FLAG0f606da8f [2024-11-07 19:30:42,542 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/429637166/7f1aad305c5b4503a6bc319f4b7a5364 [2024-11-07 19:30:42,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-07 19:30:42,544 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-07 19:30:42,545 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-07 19:30:42,545 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-07 19:30:42,548 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-07 19:30:42,548 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:30:42" (1/1) ... [2024-11-07 19:30:42,549 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e261f99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:30:42, skipping insertion in model container [2024-11-07 19:30:42,549 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:30:42" (1/1) ... [2024-11-07 19:30:42,561 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-07 19:30:42,673 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 19:30:42,674 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:30:42,681 INFO L200 MainTranslator]: Completed pre-run [2024-11-07 19:30:42,705 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:30:42,721 INFO L204 MainTranslator]: Completed translation [2024-11-07 19:30:42,722 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:30:42 WrapperNode [2024-11-07 19:30:42,722 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-07 19:30:42,723 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-07 19:30:42,723 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-07 19:30:42,723 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-07 19:30:42,727 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:30:42" (1/1) ... [2024-11-07 19:30:42,735 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:30:42" (1/1) ... [2024-11-07 19:30:42,756 INFO L138 Inliner]: procedures = 24, calls = 31, calls flagged for inlining = 10, calls inlined = 14, statements flattened = 171 [2024-11-07 19:30:42,760 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-07 19:30:42,760 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-07 19:30:42,760 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-07 19:30:42,760 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-07 19:30:42,767 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:30:42" (1/1) ... [2024-11-07 19:30:42,767 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:30:42" (1/1) ... [2024-11-07 19:30:42,771 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:30:42" (1/1) ... [2024-11-07 19:30:42,790 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-07 19:30:42,791 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:30:42" (1/1) ... [2024-11-07 19:30:42,791 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:30:42" (1/1) ... [2024-11-07 19:30:42,799 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:30:42" (1/1) ... [2024-11-07 19:30:42,802 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:30:42" (1/1) ... [2024-11-07 19:30:42,807 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:30:42" (1/1) ... [2024-11-07 19:30:42,807 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:30:42" (1/1) ... [2024-11-07 19:30:42,811 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-07 19:30:42,813 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-07 19:30:42,813 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-07 19:30:42,813 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-07 19:30:42,814 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:30:42" (1/1) ... [2024-11-07 19:30:42,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:30:42,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:42,844 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 19:30:42,854 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 19:30:42,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-07 19:30:42,885 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-07 19:30:42,885 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-07 19:30:42,885 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-07 19:30:42,885 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-07 19:30:42,885 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-07 19:30:42,885 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-07 19:30:42,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-07 19:30:42,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-07 19:30:42,885 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-07 19:30:42,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-07 19:30:42,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-07 19:30:42,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-07 19:30:42,886 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-07 19:30:42,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-07 19:30:42,886 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-07 19:30:42,887 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 19:30:42,961 INFO L238 CfgBuilder]: Building ICFG [2024-11-07 19:30:42,962 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-07 19:30:43,347 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-07 19:30:43,347 INFO L287 CfgBuilder]: Performing block encoding [2024-11-07 19:30:43,536 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-07 19:30:43,536 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-07 19:30:43,536 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:30:43 BoogieIcfgContainer [2024-11-07 19:30:43,537 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-07 19:30:43,538 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-07 19:30:43,538 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-07 19:30:43,541 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-07 19:30:43,541 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:30:42" (1/3) ... [2024-11-07 19:30:43,542 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b9ba324 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:30:43, skipping insertion in model container [2024-11-07 19:30:43,542 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:30:42" (2/3) ... [2024-11-07 19:30:43,542 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b9ba324 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:30:43, skipping insertion in model container [2024-11-07 19:30:43,542 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:30:43" (3/3) ... [2024-11-07 19:30:43,543 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-subst.wvr.c [2024-11-07 19:30:43,555 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-07 19:30:43,556 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 32 error locations. [2024-11-07 19:30:43,556 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-07 19:30:43,656 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-07 19:30:43,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 96 transitions, 213 flow [2024-11-07 19:30:43,716 INFO L124 PetriNetUnfolderBase]: 12/93 cut-off events. [2024-11-07 19:30:43,718 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-07 19:30:43,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106 conditions, 93 events. 12/93 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 327 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2024-11-07 19:30:43,722 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 96 transitions, 213 flow [2024-11-07 19:30:43,725 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 90 places, 92 transitions, 202 flow [2024-11-07 19:30:43,734 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 19:30:43,741 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;@65382d73, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 19:30:43,745 INFO L334 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2024-11-07 19:30:43,747 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 19:30:43,747 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-07 19:30:43,747 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 19:30:43,748 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:43,748 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:30:43,749 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-07 19:30:43,752 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:43,752 INFO L85 PathProgramCache]: Analyzing trace with hash 791289, now seen corresponding path program 1 times [2024-11-07 19:30:43,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:43,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002998923] [2024-11-07 19:30:43,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:43,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:43,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:43,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:43,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:43,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002998923] [2024-11-07 19:30:43,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002998923] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:43,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:30:43,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-07 19:30:43,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167049500] [2024-11-07 19:30:43,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:43,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:30:43,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:43,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:30:43,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:30:44,030 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-07 19:30:44,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 92 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:44,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:44,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-07 19:30:44,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:44,741 INFO L124 PetriNetUnfolderBase]: 2712/4947 cut-off events. [2024-11-07 19:30:44,745 INFO L125 PetriNetUnfolderBase]: For 181/181 co-relation queries the response was YES. [2024-11-07 19:30:44,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8698 conditions, 4947 events. 2712/4947 cut-off events. For 181/181 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 34539 event pairs, 1692 based on Foata normal form. 1/3396 useless extension candidates. Maximal degree in co-relation 8222. Up to 3567 conditions per place. [2024-11-07 19:30:44,794 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 45 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2024-11-07 19:30:44,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 87 transitions, 286 flow [2024-11-07 19:30:44,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:30:44,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:30:44,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 183 transitions. [2024-11-07 19:30:44,814 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6354166666666666 [2024-11-07 19:30:44,815 INFO L175 Difference]: Start difference. First operand has 90 places, 92 transitions, 202 flow. Second operand 3 states and 183 transitions. [2024-11-07 19:30:44,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 87 transitions, 286 flow [2024-11-07 19:30:44,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 87 transitions, 274 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-07 19:30:44,826 INFO L231 Difference]: Finished difference. Result has 81 places, 87 transitions, 184 flow [2024-11-07 19:30:44,832 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=81, PETRI_TRANSITIONS=87} [2024-11-07 19:30:44,838 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -9 predicate places. [2024-11-07 19:30:44,838 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 87 transitions, 184 flow [2024-11-07 19:30:44,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:44,839 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:44,839 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:30:44,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-07 19:30:44,839 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-07 19:30:44,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:44,839 INFO L85 PathProgramCache]: Analyzing trace with hash 791290, now seen corresponding path program 1 times [2024-11-07 19:30:44,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:44,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695639981] [2024-11-07 19:30:44,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:44,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:44,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:45,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:45,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:45,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695639981] [2024-11-07 19:30:45,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695639981] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:45,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:30:45,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:30:45,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454223153] [2024-11-07 19:30:45,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:45,085 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:30:45,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:45,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:30:45,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:30:45,185 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-07 19:30:45,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 87 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:45,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:45,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-07 19:30:45,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:45,532 INFO L124 PetriNetUnfolderBase]: 2713/4950 cut-off events. [2024-11-07 19:30:45,533 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-11-07 19:30:45,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8593 conditions, 4950 events. 2713/4950 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 34569 event pairs, 1692 based on Foata normal form. 0/3395 useless extension candidates. Maximal degree in co-relation 8556. Up to 3580 conditions per place. [2024-11-07 19:30:45,550 INFO L140 encePairwiseOnDemand]: 91/96 looper letters, 49 selfloop transitions, 4 changer transitions 0/90 dead transitions. [2024-11-07 19:30:45,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 90 transitions, 296 flow [2024-11-07 19:30:45,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:30:45,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:30:45,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 230 transitions. [2024-11-07 19:30:45,552 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5989583333333334 [2024-11-07 19:30:45,552 INFO L175 Difference]: Start difference. First operand has 81 places, 87 transitions, 184 flow. Second operand 4 states and 230 transitions. [2024-11-07 19:30:45,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 90 transitions, 296 flow [2024-11-07 19:30:45,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 90 transitions, 292 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:30:45,554 INFO L231 Difference]: Finished difference. Result has 84 places, 90 transitions, 207 flow [2024-11-07 19:30:45,554 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=207, PETRI_PLACES=84, PETRI_TRANSITIONS=90} [2024-11-07 19:30:45,555 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -6 predicate places. [2024-11-07 19:30:45,555 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 90 transitions, 207 flow [2024-11-07 19:30:45,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:45,555 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:45,555 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-07 19:30:45,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-07 19:30:45,555 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-07 19:30:45,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:45,556 INFO L85 PathProgramCache]: Analyzing trace with hash 24530088, now seen corresponding path program 1 times [2024-11-07 19:30:45,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:45,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813546982] [2024-11-07 19:30:45,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:45,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:45,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:45,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:45,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:45,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813546982] [2024-11-07 19:30:45,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813546982] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:45,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:30:45,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:30:45,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260374714] [2024-11-07 19:30:45,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:45,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:30:45,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:45,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:30:45,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:30:45,927 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-07 19:30:45,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 90 transitions, 207 flow. Second operand has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:45,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:45,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-07 19:30:45,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:46,544 INFO L124 PetriNetUnfolderBase]: 2714/4953 cut-off events. [2024-11-07 19:30:46,548 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-11-07 19:30:46,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8610 conditions, 4953 events. 2714/4953 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34555 event pairs, 1692 based on Foata normal form. 0/3397 useless extension candidates. Maximal degree in co-relation 8585. Up to 3579 conditions per place. [2024-11-07 19:30:46,599 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 49 selfloop transitions, 7 changer transitions 0/93 dead transitions. [2024-11-07 19:30:46,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 93 transitions, 325 flow [2024-11-07 19:30:46,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:30:46,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:30:46,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 277 transitions. [2024-11-07 19:30:46,607 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5770833333333333 [2024-11-07 19:30:46,607 INFO L175 Difference]: Start difference. First operand has 84 places, 90 transitions, 207 flow. Second operand 5 states and 277 transitions. [2024-11-07 19:30:46,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 93 transitions, 325 flow [2024-11-07 19:30:46,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 93 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:30:46,610 INFO L231 Difference]: Finished difference. Result has 89 places, 93 transitions, 241 flow [2024-11-07 19:30:46,610 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=241, PETRI_PLACES=89, PETRI_TRANSITIONS=93} [2024-11-07 19:30:46,610 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, -1 predicate places. [2024-11-07 19:30:46,614 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 93 transitions, 241 flow [2024-11-07 19:30:46,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.8) internal successors, (224), 5 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:46,614 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:46,615 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-07 19:30:46,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-07 19:30:46,615 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-07 19:30:46,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:46,615 INFO L85 PathProgramCache]: Analyzing trace with hash 760433302, now seen corresponding path program 1 times [2024-11-07 19:30:46,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:46,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747146057] [2024-11-07 19:30:46,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:46,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:46,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:46,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:46,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747146057] [2024-11-07 19:30:46,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747146057] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:46,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:30:46,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:30:46,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577370156] [2024-11-07 19:30:46,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:46,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:30:46,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:46,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:30:46,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:30:46,990 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-07 19:30:46,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 93 transitions, 241 flow. Second operand has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:46,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:46,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-07 19:30:46,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:47,301 INFO L124 PetriNetUnfolderBase]: 2715/4956 cut-off events. [2024-11-07 19:30:47,301 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2024-11-07 19:30:47,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8632 conditions, 4956 events. 2715/4956 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34602 event pairs, 1692 based on Foata normal form. 0/3401 useless extension candidates. Maximal degree in co-relation 8601. Up to 3582 conditions per place. [2024-11-07 19:30:47,321 INFO L140 encePairwiseOnDemand]: 87/96 looper letters, 50 selfloop transitions, 9 changer transitions 0/96 dead transitions. [2024-11-07 19:30:47,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 96 transitions, 365 flow [2024-11-07 19:30:47,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:30:47,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:30:47,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 277 transitions. [2024-11-07 19:30:47,322 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5770833333333333 [2024-11-07 19:30:47,323 INFO L175 Difference]: Start difference. First operand has 89 places, 93 transitions, 241 flow. Second operand 5 states and 277 transitions. [2024-11-07 19:30:47,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 96 transitions, 365 flow [2024-11-07 19:30:47,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 96 transitions, 364 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:30:47,325 INFO L231 Difference]: Finished difference. Result has 94 places, 96 transitions, 283 flow [2024-11-07 19:30:47,325 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=283, PETRI_PLACES=94, PETRI_TRANSITIONS=96} [2024-11-07 19:30:47,326 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 4 predicate places. [2024-11-07 19:30:47,326 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 96 transitions, 283 flow [2024-11-07 19:30:47,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:47,326 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:47,326 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-07 19:30:47,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-07 19:30:47,327 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-07 19:30:47,327 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:47,328 INFO L85 PathProgramCache]: Analyzing trace with hash 760455063, now seen corresponding path program 1 times [2024-11-07 19:30:47,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:47,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932523296] [2024-11-07 19:30:47,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:47,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:47,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:47,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:47,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932523296] [2024-11-07 19:30:47,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932523296] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:47,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117474835] [2024-11-07 19:30:47,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:47,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:47,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:47,487 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:30:47,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-07 19:30:47,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:47,549 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-07 19:30:47,551 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:47,595 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 19:30:47,748 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 19:30:47,749 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:30:47,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:47,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117474835] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:30:47,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:30:47,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-07 19:30:47,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283977965] [2024-11-07 19:30:47,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:30:47,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-07 19:30:47,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:47,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-07 19:30:47,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-07 19:30:48,261 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-07 19:30:48,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 96 transitions, 283 flow. Second operand has 11 states, 11 states have (on average 45.36363636363637) internal successors, (499), 11 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:48,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:48,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-07 19:30:48,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:48,663 INFO L124 PetriNetUnfolderBase]: 2715/4955 cut-off events. [2024-11-07 19:30:48,664 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-11-07 19:30:48,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8650 conditions, 4955 events. 2715/4955 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34587 event pairs, 1692 based on Foata normal form. 0/3403 useless extension candidates. Maximal degree in co-relation 8616. Up to 3582 conditions per place. [2024-11-07 19:30:48,681 INFO L140 encePairwiseOnDemand]: 91/96 looper letters, 51 selfloop transitions, 7 changer transitions 0/95 dead transitions. [2024-11-07 19:30:48,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 95 transitions, 395 flow [2024-11-07 19:30:48,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:30:48,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:30:48,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 317 transitions. [2024-11-07 19:30:48,684 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5503472222222222 [2024-11-07 19:30:48,684 INFO L175 Difference]: Start difference. First operand has 94 places, 96 transitions, 283 flow. Second operand 6 states and 317 transitions. [2024-11-07 19:30:48,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 95 transitions, 395 flow [2024-11-07 19:30:48,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 95 transitions, 388 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:30:48,687 INFO L231 Difference]: Finished difference. Result has 96 places, 95 transitions, 286 flow [2024-11-07 19:30:48,687 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=286, PETRI_PLACES=96, PETRI_TRANSITIONS=95} [2024-11-07 19:30:48,687 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 6 predicate places. [2024-11-07 19:30:48,689 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 95 transitions, 286 flow [2024-11-07 19:30:48,689 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 45.36363636363637) internal successors, (499), 11 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:48,689 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:48,689 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-07 19:30:48,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-07 19:30:48,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:48,890 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-07 19:30:48,890 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:48,890 INFO L85 PathProgramCache]: Analyzing trace with hash 2098602676, now seen corresponding path program 1 times [2024-11-07 19:30:48,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:48,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778874668] [2024-11-07 19:30:48,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:48,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:49,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:49,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:49,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778874668] [2024-11-07 19:30:49,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778874668] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:49,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636908135] [2024-11-07 19:30:49,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:49,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:49,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:49,045 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:30:49,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-07 19:30:49,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:49,096 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-07 19:30:49,097 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:49,104 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 19:30:49,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:49,220 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:30:49,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:49,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636908135] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:30:49,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:30:49,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-07 19:30:49,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918557310] [2024-11-07 19:30:49,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:30:49,345 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-07 19:30:49,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:49,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-07 19:30:49,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-07 19:30:50,768 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-07 19:30:50,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 95 transitions, 286 flow. Second operand has 13 states, 13 states have (on average 45.30769230769231) internal successors, (589), 13 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:50,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:50,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-07 19:30:50,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:51,822 INFO L124 PetriNetUnfolderBase]: 2717/4960 cut-off events. [2024-11-07 19:30:51,823 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2024-11-07 19:30:51,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8673 conditions, 4960 events. 2717/4960 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34635 event pairs, 1692 based on Foata normal form. 0/3409 useless extension candidates. Maximal degree in co-relation 8622. Up to 3575 conditions per place. [2024-11-07 19:30:51,838 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 45 selfloop transitions, 18 changer transitions 0/100 dead transitions. [2024-11-07 19:30:51,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 100 transitions, 443 flow [2024-11-07 19:30:51,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:30:51,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:30:51,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 458 transitions. [2024-11-07 19:30:51,841 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5300925925925926 [2024-11-07 19:30:51,842 INFO L175 Difference]: Start difference. First operand has 96 places, 95 transitions, 286 flow. Second operand 9 states and 458 transitions. [2024-11-07 19:30:51,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 100 transitions, 443 flow [2024-11-07 19:30:51,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 100 transitions, 396 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-07 19:30:51,846 INFO L231 Difference]: Finished difference. Result has 95 places, 100 transitions, 306 flow [2024-11-07 19:30:51,847 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=306, PETRI_PLACES=95, PETRI_TRANSITIONS=100} [2024-11-07 19:30:51,848 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 5 predicate places. [2024-11-07 19:30:51,848 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 100 transitions, 306 flow [2024-11-07 19:30:51,848 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 45.30769230769231) internal successors, (589), 13 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:51,848 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:51,848 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-07 19:30:51,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-07 19:30:52,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:52,049 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-07 19:30:52,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:52,049 INFO L85 PathProgramCache]: Analyzing trace with hash 631987656, now seen corresponding path program 1 times [2024-11-07 19:30:52,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:52,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006271688] [2024-11-07 19:30:52,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:52,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:52,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:52,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:52,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:52,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006271688] [2024-11-07 19:30:52,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006271688] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:52,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14528527] [2024-11-07 19:30:52,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:52,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:52,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:52,323 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:30:52,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-07 19:30:52,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:52,424 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-07 19:30:52,425 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:52,439 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 19:30:52,553 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:52,553 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:30:52,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:52,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14528527] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:30:52,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:30:52,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-07 19:30:52,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046914117] [2024-11-07 19:30:52,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:30:52,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-07 19:30:52,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:52,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-07 19:30:52,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-07 19:30:53,297 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-07 19:30:53,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 100 transitions, 306 flow. Second operand has 13 states, 13 states have (on average 45.46153846153846) internal successors, (591), 13 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:53,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:53,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-07 19:30:53,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:53,760 INFO L124 PetriNetUnfolderBase]: 2718/4962 cut-off events. [2024-11-07 19:30:53,760 INFO L125 PetriNetUnfolderBase]: For 49/49 co-relation queries the response was YES. [2024-11-07 19:30:53,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8671 conditions, 4962 events. 2718/4962 cut-off events. For 49/49 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34638 event pairs, 1692 based on Foata normal form. 0/3411 useless extension candidates. Maximal degree in co-relation 8607. Up to 3577 conditions per place. [2024-11-07 19:30:53,779 INFO L140 encePairwiseOnDemand]: 87/96 looper letters, 43 selfloop transitions, 22 changer transitions 0/102 dead transitions. [2024-11-07 19:30:53,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 102 transitions, 444 flow [2024-11-07 19:30:53,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:30:53,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:30:53,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 457 transitions. [2024-11-07 19:30:53,780 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5289351851851852 [2024-11-07 19:30:53,780 INFO L175 Difference]: Start difference. First operand has 95 places, 100 transitions, 306 flow. Second operand 9 states and 457 transitions. [2024-11-07 19:30:53,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 102 transitions, 444 flow [2024-11-07 19:30:53,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 102 transitions, 411 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-07 19:30:53,782 INFO L231 Difference]: Finished difference. Result has 97 places, 102 transitions, 325 flow [2024-11-07 19:30:53,782 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=325, PETRI_PLACES=97, PETRI_TRANSITIONS=102} [2024-11-07 19:30:53,783 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 7 predicate places. [2024-11-07 19:30:53,783 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 102 transitions, 325 flow [2024-11-07 19:30:53,786 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 45.46153846153846) internal successors, (591), 13 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:53,786 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:53,786 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:53,803 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 19:30:53,990 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 19:30:53,991 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-07 19:30:53,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:53,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1895181944, now seen corresponding path program 1 times [2024-11-07 19:30:53,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:53,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367513493] [2024-11-07 19:30:53,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:53,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:54,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:54,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:54,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:54,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367513493] [2024-11-07 19:30:54,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367513493] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:54,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:30:54,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:30:54,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771201791] [2024-11-07 19:30:54,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:54,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:30:54,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:54,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:30:54,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:30:54,093 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-07 19:30:54,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 102 transitions, 325 flow. Second operand has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:54,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:54,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-07 19:30:54,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:54,495 INFO L124 PetriNetUnfolderBase]: 5204/9287 cut-off events. [2024-11-07 19:30:54,495 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2024-11-07 19:30:54,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16446 conditions, 9287 events. 5204/9287 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 69657 event pairs, 2894 based on Foata normal form. 0/6441 useless extension candidates. Maximal degree in co-relation 9724. Up to 4040 conditions per place. [2024-11-07 19:30:54,519 INFO L140 encePairwiseOnDemand]: 86/96 looper letters, 131 selfloop transitions, 10 changer transitions 0/177 dead transitions. [2024-11-07 19:30:54,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 177 transitions, 833 flow [2024-11-07 19:30:54,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:30:54,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:30:54,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 397 transitions. [2024-11-07 19:30:54,520 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6892361111111112 [2024-11-07 19:30:54,520 INFO L175 Difference]: Start difference. First operand has 97 places, 102 transitions, 325 flow. Second operand 6 states and 397 transitions. [2024-11-07 19:30:54,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 177 transitions, 833 flow [2024-11-07 19:30:54,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 177 transitions, 755 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-11-07 19:30:54,527 INFO L231 Difference]: Finished difference. Result has 99 places, 109 transitions, 355 flow [2024-11-07 19:30:54,527 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=355, PETRI_PLACES=99, PETRI_TRANSITIONS=109} [2024-11-07 19:30:54,528 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 9 predicate places. [2024-11-07 19:30:54,528 INFO L471 AbstractCegarLoop]: Abstraction has has 99 places, 109 transitions, 355 flow [2024-11-07 19:30:54,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.6) internal successors, (238), 5 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:54,528 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:54,528 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:54,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-07 19:30:54,528 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-07 19:30:54,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:54,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1500049067, now seen corresponding path program 1 times [2024-11-07 19:30:54,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:54,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403284228] [2024-11-07 19:30:54,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:54,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:54,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:30:54,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:54,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403284228] [2024-11-07 19:30:54,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403284228] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:54,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:30:54,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-07 19:30:54,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278795276] [2024-11-07 19:30:54,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:54,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:30:54,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:54,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:30:54,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:30:54,664 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-07 19:30:54,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 109 transitions, 355 flow. Second operand has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:54,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:54,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-07 19:30:54,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:55,530 INFO L124 PetriNetUnfolderBase]: 9500/17358 cut-off events. [2024-11-07 19:30:55,530 INFO L125 PetriNetUnfolderBase]: For 1723/1723 co-relation queries the response was YES. [2024-11-07 19:30:55,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31888 conditions, 17358 events. 9500/17358 cut-off events. For 1723/1723 co-relation queries the response was YES. Maximal size of possible extension queue 975. Compared 146263 event pairs, 5298 based on Foata normal form. 114/12673 useless extension candidates. Maximal degree in co-relation 22620. Up to 6942 conditions per place. [2024-11-07 19:30:55,580 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 129 selfloop transitions, 14 changer transitions 0/179 dead transitions. [2024-11-07 19:30:55,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 179 transitions, 831 flow [2024-11-07 19:30:55,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:30:55,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:30:55,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 391 transitions. [2024-11-07 19:30:55,582 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6788194444444444 [2024-11-07 19:30:55,582 INFO L175 Difference]: Start difference. First operand has 99 places, 109 transitions, 355 flow. Second operand 6 states and 391 transitions. [2024-11-07 19:30:55,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 179 transitions, 831 flow [2024-11-07 19:30:55,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 179 transitions, 826 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:30:55,587 INFO L231 Difference]: Finished difference. Result has 105 places, 117 transitions, 459 flow [2024-11-07 19:30:55,587 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=459, PETRI_PLACES=105, PETRI_TRANSITIONS=117} [2024-11-07 19:30:55,588 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 15 predicate places. [2024-11-07 19:30:55,588 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 117 transitions, 459 flow [2024-11-07 19:30:55,588 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:55,588 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:55,588 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:55,588 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-07 19:30:55,588 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-07 19:30:55,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:55,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1141308600, now seen corresponding path program 1 times [2024-11-07 19:30:55,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:55,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700111253] [2024-11-07 19:30:55,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:55,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:55,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:55,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:55,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700111253] [2024-11-07 19:30:55,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700111253] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:55,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:30:55,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:30:55,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332416804] [2024-11-07 19:30:55,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:55,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:30:55,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:55,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:30:55,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:30:55,656 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-07 19:30:55,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 117 transitions, 459 flow. Second operand has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:55,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:55,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-07 19:30:55,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:56,320 INFO L124 PetriNetUnfolderBase]: 8828/16125 cut-off events. [2024-11-07 19:30:56,320 INFO L125 PetriNetUnfolderBase]: For 5616/5616 co-relation queries the response was YES. [2024-11-07 19:30:56,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31100 conditions, 16125 events. 8828/16125 cut-off events. For 5616/5616 co-relation queries the response was YES. Maximal size of possible extension queue 880. Compared 133281 event pairs, 5194 based on Foata normal form. 0/11710 useless extension candidates. Maximal degree in co-relation 23027. Up to 7333 conditions per place. [2024-11-07 19:30:56,364 INFO L140 encePairwiseOnDemand]: 86/96 looper letters, 132 selfloop transitions, 12 changer transitions 0/180 dead transitions. [2024-11-07 19:30:56,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 180 transitions, 937 flow [2024-11-07 19:30:56,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:30:56,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:30:56,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 390 transitions. [2024-11-07 19:30:56,366 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2024-11-07 19:30:56,366 INFO L175 Difference]: Start difference. First operand has 105 places, 117 transitions, 459 flow. Second operand 6 states and 390 transitions. [2024-11-07 19:30:56,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 180 transitions, 937 flow [2024-11-07 19:30:56,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 180 transitions, 932 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:30:56,374 INFO L231 Difference]: Finished difference. Result has 111 places, 119 transitions, 499 flow [2024-11-07 19:30:56,374 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=499, PETRI_PLACES=111, PETRI_TRANSITIONS=119} [2024-11-07 19:30:56,376 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 21 predicate places. [2024-11-07 19:30:56,376 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 119 transitions, 499 flow [2024-11-07 19:30:56,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.0) internal successors, (240), 5 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:56,377 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:56,377 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:56,377 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-07 19:30:56,377 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-07 19:30:56,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:56,377 INFO L85 PathProgramCache]: Analyzing trace with hash -393930269, now seen corresponding path program 1 times [2024-11-07 19:30:56,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:56,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535564525] [2024-11-07 19:30:56,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:56,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:56,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:56,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:56,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:56,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535564525] [2024-11-07 19:30:56,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535564525] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:56,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:30:56,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-07 19:30:56,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048324537] [2024-11-07 19:30:56,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:56,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:30:56,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:56,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:30:56,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:30:56,452 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-07 19:30:56,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 119 transitions, 499 flow. Second operand has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:56,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:56,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-07 19:30:56,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:57,270 INFO L124 PetriNetUnfolderBase]: 7930/14288 cut-off events. [2024-11-07 19:30:57,270 INFO L125 PetriNetUnfolderBase]: For 6615/6615 co-relation queries the response was YES. [2024-11-07 19:30:57,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29344 conditions, 14288 events. 7930/14288 cut-off events. For 6615/6615 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 112435 event pairs, 4896 based on Foata normal form. 0/10878 useless extension candidates. Maximal degree in co-relation 21567. Up to 6606 conditions per place. [2024-11-07 19:30:57,340 INFO L140 encePairwiseOnDemand]: 88/96 looper letters, 131 selfloop transitions, 12 changer transitions 0/179 dead transitions. [2024-11-07 19:30:57,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 179 transitions, 977 flow [2024-11-07 19:30:57,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:30:57,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:30:57,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 383 transitions. [2024-11-07 19:30:57,342 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6649305555555556 [2024-11-07 19:30:57,342 INFO L175 Difference]: Start difference. First operand has 111 places, 119 transitions, 499 flow. Second operand 6 states and 383 transitions. [2024-11-07 19:30:57,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 179 transitions, 977 flow [2024-11-07 19:30:57,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 179 transitions, 964 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:30:57,353 INFO L231 Difference]: Finished difference. Result has 115 places, 121 transitions, 528 flow [2024-11-07 19:30:57,353 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=528, PETRI_PLACES=115, PETRI_TRANSITIONS=121} [2024-11-07 19:30:57,354 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 25 predicate places. [2024-11-07 19:30:57,354 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 121 transitions, 528 flow [2024-11-07 19:30:57,354 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:57,354 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:57,354 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:57,354 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-07 19:30:57,354 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-07 19:30:57,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:57,354 INFO L85 PathProgramCache]: Analyzing trace with hash -214311031, now seen corresponding path program 1 times [2024-11-07 19:30:57,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:57,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208304490] [2024-11-07 19:30:57,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:57,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:57,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:57,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:30:57,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:57,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208304490] [2024-11-07 19:30:57,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208304490] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:57,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186979470] [2024-11-07 19:30:57,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:57,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:57,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:57,600 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:30:57,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-07 19:30:57,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:57,669 INFO L255 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-07 19:30:57,670 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:57,678 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-07 19:30:57,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-07 19:30:57,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-07 19:30:57,736 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-07 19:30:57,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-07 19:30:57,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-07 19:30:57,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-07 19:30:57,778 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-07 19:30:57,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-07 19:30:57,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:30:57,817 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:30:57,987 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 162 treesize of output 156 [2024-11-07 19:30:58,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:30:58,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186979470] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:30:58,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:30:58,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2024-11-07 19:30:58,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192745946] [2024-11-07 19:30:58,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:30:58,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-07 19:30:58,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:58,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-07 19:30:58,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2024-11-07 19:31:03,615 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 96 [2024-11-07 19:31:03,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 121 transitions, 528 flow. Second operand has 16 states, 16 states have (on average 33.0625) internal successors, (529), 16 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:03,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:03,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 96 [2024-11-07 19:31:03,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:05,093 INFO L124 PetriNetUnfolderBase]: 15810/25408 cut-off events. [2024-11-07 19:31:05,093 INFO L125 PetriNetUnfolderBase]: For 9124/9124 co-relation queries the response was YES. [2024-11-07 19:31:05,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54942 conditions, 25408 events. 15810/25408 cut-off events. For 9124/9124 co-relation queries the response was YES. Maximal size of possible extension queue 819. Compared 183980 event pairs, 6452 based on Foata normal form. 0/20964 useless extension candidates. Maximal degree in co-relation 36791. Up to 8004 conditions per place. [2024-11-07 19:31:05,253 INFO L140 encePairwiseOnDemand]: 79/96 looper letters, 170 selfloop transitions, 30 changer transitions 0/224 dead transitions. [2024-11-07 19:31:05,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 224 transitions, 1218 flow [2024-11-07 19:31:05,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:31:05,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:31:05,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 463 transitions. [2024-11-07 19:31:05,263 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5358796296296297 [2024-11-07 19:31:05,263 INFO L175 Difference]: Start difference. First operand has 115 places, 121 transitions, 528 flow. Second operand 9 states and 463 transitions. [2024-11-07 19:31:05,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 224 transitions, 1218 flow [2024-11-07 19:31:05,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 224 transitions, 1200 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:31:05,285 INFO L231 Difference]: Finished difference. Result has 117 places, 122 transitions, 607 flow [2024-11-07 19:31:05,285 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=607, PETRI_PLACES=117, PETRI_TRANSITIONS=122} [2024-11-07 19:31:05,286 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 27 predicate places. [2024-11-07 19:31:05,286 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 122 transitions, 607 flow [2024-11-07 19:31:05,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 33.0625) internal successors, (529), 16 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:05,286 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:05,286 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:05,300 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 19:31:05,490 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,SelfDestructingSolverStorable11 [2024-11-07 19:31:05,490 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-07 19:31:05,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:05,491 INFO L85 PathProgramCache]: Analyzing trace with hash 216834790, now seen corresponding path program 1 times [2024-11-07 19:31:05,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:05,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023975622] [2024-11-07 19:31:05,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:05,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:05,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:31:05,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:05,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023975622] [2024-11-07 19:31:05,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023975622] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:31:05,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:31:05,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-07 19:31:05,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073031309] [2024-11-07 19:31:05,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:31:05,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:31:05,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:05,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:31:05,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:31:05,564 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-07 19:31:05,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 122 transitions, 607 flow. Second operand has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:05,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:05,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-07 19:31:05,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:07,121 INFO L124 PetriNetUnfolderBase]: 17406/31568 cut-off events. [2024-11-07 19:31:07,122 INFO L125 PetriNetUnfolderBase]: For 25060/25106 co-relation queries the response was YES. [2024-11-07 19:31:07,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70674 conditions, 31568 events. 17406/31568 cut-off events. For 25060/25106 co-relation queries the response was YES. Maximal size of possible extension queue 1179. Compared 272744 event pairs, 10416 based on Foata normal form. 273/26295 useless extension candidates. Maximal degree in co-relation 50832. Up to 13223 conditions per place. [2024-11-07 19:31:07,269 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 153 selfloop transitions, 17 changer transitions 0/202 dead transitions. [2024-11-07 19:31:07,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 202 transitions, 1319 flow [2024-11-07 19:31:07,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:31:07,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:31:07,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 338 transitions. [2024-11-07 19:31:07,270 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7041666666666667 [2024-11-07 19:31:07,270 INFO L175 Difference]: Start difference. First operand has 117 places, 122 transitions, 607 flow. Second operand 5 states and 338 transitions. [2024-11-07 19:31:07,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 202 transitions, 1319 flow [2024-11-07 19:31:07,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 202 transitions, 1240 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-11-07 19:31:07,294 INFO L231 Difference]: Finished difference. Result has 119 places, 126 transitions, 628 flow [2024-11-07 19:31:07,295 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=628, PETRI_PLACES=119, PETRI_TRANSITIONS=126} [2024-11-07 19:31:07,296 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 29 predicate places. [2024-11-07 19:31:07,297 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 126 transitions, 628 flow [2024-11-07 19:31:07,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.4) internal successors, (242), 5 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:07,297 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:07,297 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:07,297 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-07 19:31:07,297 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-07 19:31:07,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:07,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1946293397, now seen corresponding path program 1 times [2024-11-07 19:31:07,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:07,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462024536] [2024-11-07 19:31:07,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:07,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:07,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:31:07,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:07,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462024536] [2024-11-07 19:31:07,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462024536] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:31:07,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:31:07,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:31:07,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901156755] [2024-11-07 19:31:07,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:31:07,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:31:07,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:07,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:31:07,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:31:07,412 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 96 [2024-11-07 19:31:07,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 126 transitions, 628 flow. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:07,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:07,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 96 [2024-11-07 19:31:07,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:09,234 INFO L124 PetriNetUnfolderBase]: 20661/35140 cut-off events. [2024-11-07 19:31:09,234 INFO L125 PetriNetUnfolderBase]: For 30262/30262 co-relation queries the response was YES. [2024-11-07 19:31:09,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82839 conditions, 35140 events. 20661/35140 cut-off events. For 30262/30262 co-relation queries the response was YES. Maximal size of possible extension queue 1179. Compared 283613 event pairs, 14989 based on Foata normal form. 0/31790 useless extension candidates. Maximal degree in co-relation 60372. Up to 28154 conditions per place. [2024-11-07 19:31:09,371 INFO L140 encePairwiseOnDemand]: 89/96 looper letters, 82 selfloop transitions, 14 changer transitions 0/122 dead transitions. [2024-11-07 19:31:09,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 122 transitions, 812 flow [2024-11-07 19:31:09,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:31:09,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:31:09,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 239 transitions. [2024-11-07 19:31:09,372 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4979166666666667 [2024-11-07 19:31:09,372 INFO L175 Difference]: Start difference. First operand has 119 places, 126 transitions, 628 flow. Second operand 5 states and 239 transitions. [2024-11-07 19:31:09,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 122 transitions, 812 flow [2024-11-07 19:31:09,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 122 transitions, 803 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:31:09,396 INFO L231 Difference]: Finished difference. Result has 118 places, 122 transitions, 639 flow [2024-11-07 19:31:09,396 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=639, PETRI_PLACES=118, PETRI_TRANSITIONS=122} [2024-11-07 19:31:09,397 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 28 predicate places. [2024-11-07 19:31:09,397 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 122 transitions, 639 flow [2024-11-07 19:31:09,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:09,397 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:09,397 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:09,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-07 19:31:09,397 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-07 19:31:09,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:09,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1946293398, now seen corresponding path program 1 times [2024-11-07 19:31:09,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:09,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374434926] [2024-11-07 19:31:09,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:09,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:09,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:09,556 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 19:31:09,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:09,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374434926] [2024-11-07 19:31:09,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374434926] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:09,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29218803] [2024-11-07 19:31:09,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:09,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:09,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:31:09,558 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:31:09,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-07 19:31:09,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:09,622 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-07 19:31:09,623 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:31:09,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-07 19:31:09,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-07 19:31:09,658 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-07 19:31:09,662 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-07 19:31:09,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-07 19:31:09,699 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 19:31:09,699 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:31:09,760 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 52 treesize of output 48 [2024-11-07 19:31:09,798 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 19:31:09,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29218803] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:31:09,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:31:09,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-07 19:31:09,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388026929] [2024-11-07 19:31:09,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:31:09,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-07 19:31:09,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:09,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-07 19:31:09,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-07 19:31:10,501 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 96 [2024-11-07 19:31:10,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 122 transitions, 639 flow. Second operand has 13 states, 13 states have (on average 43.07692307692308) internal successors, (560), 13 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:10,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:10,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 96 [2024-11-07 19:31:10,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:12,041 INFO L124 PetriNetUnfolderBase]: 18422/29799 cut-off events. [2024-11-07 19:31:12,041 INFO L125 PetriNetUnfolderBase]: For 25704/25704 co-relation queries the response was YES. [2024-11-07 19:31:12,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72019 conditions, 29799 events. 18422/29799 cut-off events. For 25704/25704 co-relation queries the response was YES. Maximal size of possible extension queue 960. Compared 221047 event pairs, 9181 based on Foata normal form. 0/26527 useless extension candidates. Maximal degree in co-relation 52479. Up to 9820 conditions per place. [2024-11-07 19:31:12,190 INFO L140 encePairwiseOnDemand]: 83/96 looper letters, 161 selfloop transitions, 34 changer transitions 0/221 dead transitions. [2024-11-07 19:31:12,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 221 transitions, 1391 flow [2024-11-07 19:31:12,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:31:12,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:31:12,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 520 transitions. [2024-11-07 19:31:12,191 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6018518518518519 [2024-11-07 19:31:12,191 INFO L175 Difference]: Start difference. First operand has 118 places, 122 transitions, 639 flow. Second operand 9 states and 520 transitions. [2024-11-07 19:31:12,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 221 transitions, 1391 flow [2024-11-07 19:31:12,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 221 transitions, 1367 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:31:12,237 INFO L231 Difference]: Finished difference. Result has 124 places, 126 transitions, 734 flow [2024-11-07 19:31:12,237 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=617, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=734, PETRI_PLACES=124, PETRI_TRANSITIONS=126} [2024-11-07 19:31:12,237 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 34 predicate places. [2024-11-07 19:31:12,237 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 126 transitions, 734 flow [2024-11-07 19:31:12,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 43.07692307692308) internal successors, (560), 13 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:12,238 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:12,238 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:12,250 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 19:31:12,438 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-07 19:31:12,439 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-07 19:31:12,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:12,439 INFO L85 PathProgramCache]: Analyzing trace with hash -406367912, now seen corresponding path program 1 times [2024-11-07 19:31:12,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:12,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882723871] [2024-11-07 19:31:12,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:12,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:12,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:12,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:31:12,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:12,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882723871] [2024-11-07 19:31:12,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882723871] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:31:12,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:31:12,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-07 19:31:12,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893275086] [2024-11-07 19:31:12,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:31:12,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:31:12,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:12,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:31:12,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:31:12,511 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-07 19:31:12,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 126 transitions, 734 flow. Second operand has 5 states, 5 states have (on average 48.8) internal successors, (244), 5 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:12,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:12,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-07 19:31:12,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:13,986 INFO L124 PetriNetUnfolderBase]: 16312/26593 cut-off events. [2024-11-07 19:31:13,986 INFO L125 PetriNetUnfolderBase]: For 35922/35964 co-relation queries the response was YES. [2024-11-07 19:31:14,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68305 conditions, 26593 events. 16312/26593 cut-off events. For 35922/35964 co-relation queries the response was YES. Maximal size of possible extension queue 796. Compared 193014 event pairs, 10256 based on Foata normal form. 218/24064 useless extension candidates. Maximal degree in co-relation 50457. Up to 13117 conditions per place. [2024-11-07 19:31:14,133 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 150 selfloop transitions, 17 changer transitions 0/195 dead transitions. [2024-11-07 19:31:14,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 195 transitions, 1450 flow [2024-11-07 19:31:14,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:31:14,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:31:14,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 331 transitions. [2024-11-07 19:31:14,134 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6895833333333333 [2024-11-07 19:31:14,134 INFO L175 Difference]: Start difference. First operand has 124 places, 126 transitions, 734 flow. Second operand 5 states and 331 transitions. [2024-11-07 19:31:14,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 195 transitions, 1450 flow [2024-11-07 19:31:14,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 195 transitions, 1372 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-11-07 19:31:14,170 INFO L231 Difference]: Finished difference. Result has 124 places, 130 transitions, 752 flow [2024-11-07 19:31:14,171 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=676, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=752, PETRI_PLACES=124, PETRI_TRANSITIONS=130} [2024-11-07 19:31:14,171 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 34 predicate places. [2024-11-07 19:31:14,171 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 130 transitions, 752 flow [2024-11-07 19:31:14,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 48.8) internal successors, (244), 5 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:14,171 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:14,171 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:14,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-07 19:31:14,172 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-07 19:31:14,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:14,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1614320984, now seen corresponding path program 1 times [2024-11-07 19:31:14,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:14,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40292036] [2024-11-07 19:31:14,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:14,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:14,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:14,414 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 19:31:14,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:14,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40292036] [2024-11-07 19:31:14,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40292036] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:14,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207665980] [2024-11-07 19:31:14,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:14,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:14,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:31:14,421 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 19:31:14,422 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 19:31:14,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:14,490 INFO L255 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-07 19:31:14,492 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:31:14,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-07 19:31:14,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-07 19:31:14,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-07 19:31:14,544 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-07 19:31:14,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-07 19:31:14,558 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-07 19:31:14,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-07 19:31:14,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:14,629 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:31:14,762 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 46 treesize of output 42 [2024-11-07 19:31:14,808 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 19:31:14,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207665980] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:31:14,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:31:14,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 13 [2024-11-07 19:31:14,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503416957] [2024-11-07 19:31:14,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:31:14,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-07 19:31:14,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:14,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-07 19:31:14,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-11-07 19:31:15,673 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 96 [2024-11-07 19:31:15,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 130 transitions, 752 flow. Second operand has 15 states, 15 states have (on average 37.333333333333336) internal successors, (560), 15 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:15,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:15,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 96 [2024-11-07 19:31:15,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:18,487 INFO L124 PetriNetUnfolderBase]: 26924/42995 cut-off events. [2024-11-07 19:31:18,487 INFO L125 PetriNetUnfolderBase]: For 54103/54353 co-relation queries the response was YES. [2024-11-07 19:31:18,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109181 conditions, 42995 events. 26924/42995 cut-off events. For 54103/54353 co-relation queries the response was YES. Maximal size of possible extension queue 1115. Compared 319620 event pairs, 13049 based on Foata normal form. 0/37925 useless extension candidates. Maximal degree in co-relation 82595. Up to 14661 conditions per place. [2024-11-07 19:31:18,686 INFO L140 encePairwiseOnDemand]: 83/96 looper letters, 199 selfloop transitions, 33 changer transitions 0/254 dead transitions. [2024-11-07 19:31:18,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 254 transitions, 1761 flow [2024-11-07 19:31:18,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-07 19:31:18,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-07 19:31:18,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 518 transitions. [2024-11-07 19:31:18,688 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5395833333333333 [2024-11-07 19:31:18,688 INFO L175 Difference]: Start difference. First operand has 124 places, 130 transitions, 752 flow. Second operand 10 states and 518 transitions. [2024-11-07 19:31:18,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 254 transitions, 1761 flow [2024-11-07 19:31:18,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 254 transitions, 1737 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:31:18,727 INFO L231 Difference]: Finished difference. Result has 133 places, 134 transitions, 842 flow [2024-11-07 19:31:18,727 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=728, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=842, PETRI_PLACES=133, PETRI_TRANSITIONS=134} [2024-11-07 19:31:18,728 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 43 predicate places. [2024-11-07 19:31:18,728 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 134 transitions, 842 flow [2024-11-07 19:31:18,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 37.333333333333336) internal successors, (560), 15 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:18,728 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:18,728 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:18,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-07 19:31:18,928 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,SelfDestructingSolverStorable16 [2024-11-07 19:31:18,929 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-07 19:31:18,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:18,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1495656260, now seen corresponding path program 1 times [2024-11-07 19:31:18,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:18,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200184745] [2024-11-07 19:31:18,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:18,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:18,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:19,037 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 19:31:19,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:19,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200184745] [2024-11-07 19:31:19,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200184745] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:19,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660727914] [2024-11-07 19:31:19,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:19,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:19,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:31:19,040 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 19:31:19,042 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 19:31:19,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:19,103 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-07 19:31:19,104 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:31:19,154 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 19:31:19,154 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:31:19,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-07 19:31:19,195 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 19:31:19,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660727914] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:31:19,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:31:19,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-07 19:31:19,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897530282] [2024-11-07 19:31:19,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:31:19,196 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-07 19:31:19,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:19,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-07 19:31:19,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-07 19:31:19,519 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-07 19:31:19,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 134 transitions, 842 flow. Second operand has 11 states, 11 states have (on average 46.36363636363637) internal successors, (510), 11 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:19,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:19,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-07 19:31:19,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:21,369 INFO L124 PetriNetUnfolderBase]: 21546/34329 cut-off events. [2024-11-07 19:31:21,369 INFO L125 PetriNetUnfolderBase]: For 53529/53967 co-relation queries the response was YES. [2024-11-07 19:31:21,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92899 conditions, 34329 events. 21546/34329 cut-off events. For 53529/53967 co-relation queries the response was YES. Maximal size of possible extension queue 944. Compared 249370 event pairs, 10533 based on Foata normal form. 0/32109 useless extension candidates. Maximal degree in co-relation 71026. Up to 11045 conditions per place. [2024-11-07 19:31:21,861 INFO L140 encePairwiseOnDemand]: 83/96 looper letters, 175 selfloop transitions, 34 changer transitions 0/235 dead transitions. [2024-11-07 19:31:21,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 235 transitions, 1748 flow [2024-11-07 19:31:21,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-07 19:31:21,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-07 19:31:21,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 451 transitions. [2024-11-07 19:31:21,866 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6711309523809523 [2024-11-07 19:31:21,866 INFO L175 Difference]: Start difference. First operand has 133 places, 134 transitions, 842 flow. Second operand 7 states and 451 transitions. [2024-11-07 19:31:21,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 235 transitions, 1748 flow [2024-11-07 19:31:21,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 235 transitions, 1692 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-11-07 19:31:21,944 INFO L231 Difference]: Finished difference. Result has 135 places, 134 transitions, 879 flow [2024-11-07 19:31:21,944 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=879, PETRI_PLACES=135, PETRI_TRANSITIONS=134} [2024-11-07 19:31:21,945 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 45 predicate places. [2024-11-07 19:31:21,945 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 134 transitions, 879 flow [2024-11-07 19:31:21,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 46.36363636363637) internal successors, (510), 11 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:21,945 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:21,945 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:21,962 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 19:31:22,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:22,146 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-07 19:31:22,146 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:22,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1495656261, now seen corresponding path program 1 times [2024-11-07 19:31:22,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:22,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598159018] [2024-11-07 19:31:22,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:22,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:22,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:22,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:31:22,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:22,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598159018] [2024-11-07 19:31:22,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598159018] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:31:22,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:31:22,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:31:22,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327439091] [2024-11-07 19:31:22,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:31:22,189 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:31:22,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:22,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:31:22,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:31:22,283 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 38 out of 96 [2024-11-07 19:31:22,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 134 transitions, 879 flow. Second operand has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:22,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:22,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 38 of 96 [2024-11-07 19:31:22,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:24,523 INFO L124 PetriNetUnfolderBase]: 21908/34613 cut-off events. [2024-11-07 19:31:24,524 INFO L125 PetriNetUnfolderBase]: For 64106/64568 co-relation queries the response was YES. [2024-11-07 19:31:24,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97808 conditions, 34613 events. 21908/34613 cut-off events. For 64106/64568 co-relation queries the response was YES. Maximal size of possible extension queue 925. Compared 246440 event pairs, 15768 based on Foata normal form. 514/33485 useless extension candidates. Maximal degree in co-relation 71386. Up to 29754 conditions per place. [2024-11-07 19:31:24,863 INFO L140 encePairwiseOnDemand]: 90/96 looper letters, 95 selfloop transitions, 13 changer transitions 0/130 dead transitions. [2024-11-07 19:31:24,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 130 transitions, 1087 flow [2024-11-07 19:31:24,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:31:24,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:31:24,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 205 transitions. [2024-11-07 19:31:24,868 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5338541666666666 [2024-11-07 19:31:24,868 INFO L175 Difference]: Start difference. First operand has 135 places, 134 transitions, 879 flow. Second operand 4 states and 205 transitions. [2024-11-07 19:31:24,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 130 transitions, 1087 flow [2024-11-07 19:31:24,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 130 transitions, 1030 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-07 19:31:24,955 INFO L231 Difference]: Finished difference. Result has 129 places, 130 transitions, 840 flow [2024-11-07 19:31:24,956 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=814, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=840, PETRI_PLACES=129, PETRI_TRANSITIONS=130} [2024-11-07 19:31:24,956 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 39 predicate places. [2024-11-07 19:31:24,956 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 130 transitions, 840 flow [2024-11-07 19:31:24,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.5) internal successors, (166), 4 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:24,956 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:24,956 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:24,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-07 19:31:24,957 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-07 19:31:24,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:24,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1242170762, now seen corresponding path program 1 times [2024-11-07 19:31:24,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:24,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732489103] [2024-11-07 19:31:24,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:24,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:24,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:25,074 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 19:31:25,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:25,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732489103] [2024-11-07 19:31:25,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732489103] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:25,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529677498] [2024-11-07 19:31:25,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:25,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:25,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:31:25,079 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 19:31:25,080 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 19:31:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:25,149 INFO L255 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-07 19:31:25,151 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:31:25,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-07 19:31:25,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-07 19:31:25,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-07 19:31:25,192 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-07 19:31:25,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-07 19:31:25,236 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 19:31:25,237 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:31:25,305 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 52 treesize of output 48 [2024-11-07 19:31:25,342 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 19:31:25,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529677498] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:31:25,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:31:25,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-07 19:31:25,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048293007] [2024-11-07 19:31:25,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:31:25,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-07 19:31:25,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:25,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-07 19:31:25,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-07 19:31:26,179 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 96 [2024-11-07 19:31:26,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 130 transitions, 840 flow. Second operand has 13 states, 13 states have (on average 42.84615384615385) internal successors, (557), 13 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:26,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:26,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 96 [2024-11-07 19:31:26,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:29,270 INFO L124 PetriNetUnfolderBase]: 28914/43983 cut-off events. [2024-11-07 19:31:29,271 INFO L125 PetriNetUnfolderBase]: For 87709/89158 co-relation queries the response was YES. [2024-11-07 19:31:29,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124368 conditions, 43983 events. 28914/43983 cut-off events. For 87709/89158 co-relation queries the response was YES. Maximal size of possible extension queue 1149. Compared 305868 event pairs, 12769 based on Foata normal form. 0/41628 useless extension candidates. Maximal degree in co-relation 85713. Up to 15493 conditions per place. [2024-11-07 19:31:29,527 INFO L140 encePairwiseOnDemand]: 83/96 looper letters, 189 selfloop transitions, 34 changer transitions 0/244 dead transitions. [2024-11-07 19:31:29,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 244 transitions, 1896 flow [2024-11-07 19:31:29,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:31:29,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:31:29,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 509 transitions. [2024-11-07 19:31:29,529 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5891203703703703 [2024-11-07 19:31:29,529 INFO L175 Difference]: Start difference. First operand has 129 places, 130 transitions, 840 flow. Second operand 9 states and 509 transitions. [2024-11-07 19:31:29,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 244 transitions, 1896 flow [2024-11-07 19:31:29,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 244 transitions, 1882 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:31:29,599 INFO L231 Difference]: Finished difference. Result has 136 places, 133 transitions, 933 flow [2024-11-07 19:31:29,600 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=933, PETRI_PLACES=136, PETRI_TRANSITIONS=133} [2024-11-07 19:31:29,600 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 46 predicate places. [2024-11-07 19:31:29,600 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 133 transitions, 933 flow [2024-11-07 19:31:29,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 42.84615384615385) internal successors, (557), 13 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:29,600 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:29,600 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:29,612 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 19:31:29,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:29,805 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-07 19:31:29,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:29,805 INFO L85 PathProgramCache]: Analyzing trace with hash -31110897, now seen corresponding path program 1 times [2024-11-07 19:31:29,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:29,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334292356] [2024-11-07 19:31:29,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:29,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:29,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:29,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:31:29,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:29,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334292356] [2024-11-07 19:31:29,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334292356] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:29,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410974147] [2024-11-07 19:31:29,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:29,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:29,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:31:29,889 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 19:31:29,889 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 19:31:30,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:30,006 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-07 19:31:30,007 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:31:30,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:31:30,062 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:31:30,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:31:30,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410974147] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:31:30,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:31:30,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2024-11-07 19:31:30,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120810968] [2024-11-07 19:31:30,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:31:30,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-07 19:31:30,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:30,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-07 19:31:30,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-07 19:31:30,345 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 96 [2024-11-07 19:31:30,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 133 transitions, 933 flow. Second operand has 16 states, 16 states have (on average 48.25) internal successors, (772), 16 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:30,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:30,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 96 [2024-11-07 19:31:30,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:37,940 INFO L124 PetriNetUnfolderBase]: 68597/106439 cut-off events. [2024-11-07 19:31:37,940 INFO L125 PetriNetUnfolderBase]: For 240856/243704 co-relation queries the response was YES. [2024-11-07 19:31:38,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314833 conditions, 106439 events. 68597/106439 cut-off events. For 240856/243704 co-relation queries the response was YES. Maximal size of possible extension queue 2822. Compared 866614 event pairs, 28775 based on Foata normal form. 1056/103965 useless extension candidates. Maximal degree in co-relation 244735. Up to 20132 conditions per place. [2024-11-07 19:31:38,685 INFO L140 encePairwiseOnDemand]: 82/96 looper letters, 454 selfloop transitions, 85 changer transitions 0/563 dead transitions. [2024-11-07 19:31:38,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 563 transitions, 4580 flow [2024-11-07 19:31:38,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-07 19:31:38,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-11-07 19:31:38,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1791 transitions. [2024-11-07 19:31:38,687 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6018145161290323 [2024-11-07 19:31:38,687 INFO L175 Difference]: Start difference. First operand has 136 places, 133 transitions, 933 flow. Second operand 31 states and 1791 transitions. [2024-11-07 19:31:38,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 563 transitions, 4580 flow [2024-11-07 19:31:39,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 563 transitions, 4398 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-11-07 19:31:39,255 INFO L231 Difference]: Finished difference. Result has 168 places, 186 transitions, 1553 flow [2024-11-07 19:31:39,256 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=96, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1553, PETRI_PLACES=168, PETRI_TRANSITIONS=186} [2024-11-07 19:31:39,256 INFO L277 CegarLoopForPetriNet]: 90 programPoint places, 78 predicate places. [2024-11-07 19:31:39,256 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 186 transitions, 1553 flow [2024-11-07 19:31:39,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 48.25) internal successors, (772), 16 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:39,256 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:39,256 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:39,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-07 19:31:39,458 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:39,459 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-11-07 19:31:39,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:39,459 INFO L85 PathProgramCache]: Analyzing trace with hash -147411233, now seen corresponding path program 1 times [2024-11-07 19:31:39,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:39,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637936533] [2024-11-07 19:31:39,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:39,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:39,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:39,625 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 19:31:39,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:39,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637936533] [2024-11-07 19:31:39,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637936533] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:39,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76083675] [2024-11-07 19:31:39,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:39,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:39,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:31:39,627 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 19:31:39,628 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 19:31:39,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:39,694 INFO L255 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-07 19:31:39,697 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:31:39,756 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 19:31:39,756 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:31:39,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-07 19:31:39,800 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 19:31:39,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76083675] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:31:39,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:31:39,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-07 19:31:39,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831295456] [2024-11-07 19:31:39,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:31:39,801 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-07 19:31:39,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:39,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-07 19:31:39,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-07 19:31:40,179 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 96 [2024-11-07 19:31:40,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 186 transitions, 1553 flow. Second operand has 11 states, 11 states have (on average 46.72727272727273) internal successors, (514), 11 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:40,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:40,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 96 [2024-11-07 19:31:40,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand