./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-prod-cons3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4f9af400 extending candidate: java ['java'] extending candidate: /usr/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/oracle-jdk-bin-*/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/openjdk-*/bin/java ['java', '/usr/bin/java'] extending candidate: /usr/lib/jvm/java-*-openjdk-amd64/bin/java ['java', '/usr/bin/java', '/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java', '/usr/lib/jvm/java-17-openjdk-amd64/bin/java', '/usr/lib/jvm/java-11-openjdk-amd64/bin/java', '/usr/lib/jvm/java-1.17.0-openjdk-amd64/bin/java'] ['/root/.sdkman/candidates/java/21.0.5-tem/bin/java', '-Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config', '-Xmx15G', '-Xms4m', '-jar', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar', '-data', '@noDefault', '-ultimatedata', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data', '-tc', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml', '-i', '../sv-benchmarks/c/weaver/popl20-prod-cons3.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', '41874b69ed787f1d4b0fd199a95bb437bfc8aab0f734c194621d2ef33cc65cc9'] Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-prod-cons3.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 41874b69ed787f1d4b0fd199a95bb437bfc8aab0f734c194621d2ef33cc65cc9 --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-07 19:37:47,619 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-07 19:37:47,693 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-07 19:37:47,700 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-07 19:37:47,701 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-07 19:37:47,721 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-07 19:37:47,722 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-07 19:37:47,722 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-07 19:37:47,722 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-07 19:37:47,723 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-07 19:37:47,723 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-07 19:37:47,723 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-07 19:37:47,723 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-07 19:37:47,724 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-07 19:37:47,724 INFO L153 SettingsManager]: * Use SBE=true [2024-11-07 19:37:47,724 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-07 19:37:47,724 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-07 19:37:47,724 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-07 19:37:47,724 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-07 19:37:47,724 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-07 19:37:47,725 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-07 19:37:47,725 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-07 19:37:47,725 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-07 19:37:47,725 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-07 19:37:47,725 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-07 19:37:47,725 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-07 19:37:47,725 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-07 19:37:47,725 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-07 19:37:47,725 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-07 19:37:47,726 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-07 19:37:47,726 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-07 19:37:47,726 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-07 19:37:47,726 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-07 19:37:47,726 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:37:47,726 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-07 19:37:47,727 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-07 19:37:47,727 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-07 19:37:47,727 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-07 19:37:47,727 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-07 19:37:47,727 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-07 19:37:47,727 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-07 19:37:47,727 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-07 19:37:47,727 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 -> 41874b69ed787f1d4b0fd199a95bb437bfc8aab0f734c194621d2ef33cc65cc9 [2024-11-07 19:37:47,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-07 19:37:47,971 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-07 19:37:47,973 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-07 19:37:47,974 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-07 19:37:47,974 INFO L274 PluginConnector]: CDTParser initialized [2024-11-07 19:37:47,975 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-prod-cons3.wvr.c [2024-11-07 19:37:49,127 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-07 19:37:49,298 INFO L384 CDTParser]: Found 1 translation units. [2024-11-07 19:37:49,300 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-prod-cons3.wvr.c [2024-11-07 19:37:49,306 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/34d0ed02d/c05a4d282f874e15a002918f7b13dc45/FLAG36426f763 [2024-11-07 19:37:49,685 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/34d0ed02d/c05a4d282f874e15a002918f7b13dc45 [2024-11-07 19:37:49,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-07 19:37:49,687 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-07 19:37:49,688 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-07 19:37:49,688 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-07 19:37:49,691 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-07 19:37:49,692 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:37:49" (1/1) ... [2024-11-07 19:37:49,692 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@491555d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:37:49, skipping insertion in model container [2024-11-07 19:37:49,692 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:37:49" (1/1) ... [2024-11-07 19:37:49,702 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-07 19:37:49,817 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 19:37:49,818 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:37:49,824 INFO L200 MainTranslator]: Completed pre-run [2024-11-07 19:37:49,848 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:37:49,863 INFO L204 MainTranslator]: Completed translation [2024-11-07 19:37:49,865 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:37:49 WrapperNode [2024-11-07 19:37:49,865 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-07 19:37:49,866 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-07 19:37:49,866 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-07 19:37:49,866 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-07 19:37:49,871 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:37:49" (1/1) ... [2024-11-07 19:37:49,878 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:37:49" (1/1) ... [2024-11-07 19:37:49,902 INFO L138 Inliner]: procedures = 25, calls = 54, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 258 [2024-11-07 19:37:49,903 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-07 19:37:49,903 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-07 19:37:49,903 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-07 19:37:49,903 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-07 19:37:49,912 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:37:49" (1/1) ... [2024-11-07 19:37:49,912 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:37:49" (1/1) ... [2024-11-07 19:37:49,919 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:37:49" (1/1) ... [2024-11-07 19:37:49,943 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-07 19:37:49,943 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:37:49" (1/1) ... [2024-11-07 19:37:49,943 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:37:49" (1/1) ... [2024-11-07 19:37:49,952 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:37:49" (1/1) ... [2024-11-07 19:37:49,958 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:37:49" (1/1) ... [2024-11-07 19:37:49,959 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:37:49" (1/1) ... [2024-11-07 19:37:49,963 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:37:49" (1/1) ... [2024-11-07 19:37:49,965 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-07 19:37:49,966 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-07 19:37:49,967 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-07 19:37:49,967 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-07 19:37:49,968 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:37:49" (1/1) ... [2024-11-07 19:37:49,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:37:49,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:37:49,993 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 19:37:49,996 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 19:37:50,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-07 19:37:50,014 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-07 19:37:50,014 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-07 19:37:50,014 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-07 19:37:50,014 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-07 19:37:50,014 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-07 19:37:50,015 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-07 19:37:50,015 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-07 19:37:50,015 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-07 19:37:50,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-07 19:37:50,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-07 19:37:50,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-07 19:37:50,015 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-07 19:37:50,015 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-07 19:37:50,015 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-07 19:37:50,015 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-07 19:37:50,015 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-07 19:37:50,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-07 19:37:50,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-07 19:37:50,015 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-07 19:37:50,016 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 19:37:50,092 INFO L238 CfgBuilder]: Building ICFG [2024-11-07 19:37:50,093 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-07 19:37:50,425 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-07 19:37:50,426 INFO L287 CfgBuilder]: Performing block encoding [2024-11-07 19:37:50,624 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-07 19:37:50,624 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-07 19:37:50,624 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:37:50 BoogieIcfgContainer [2024-11-07 19:37:50,625 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-07 19:37:50,626 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-07 19:37:50,626 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-07 19:37:50,629 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-07 19:37:50,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:37:49" (1/3) ... [2024-11-07 19:37:50,630 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4619d95a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:37:50, skipping insertion in model container [2024-11-07 19:37:50,630 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:37:49" (2/3) ... [2024-11-07 19:37:50,630 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4619d95a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:37:50, skipping insertion in model container [2024-11-07 19:37:50,630 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:37:50" (3/3) ... [2024-11-07 19:37:50,631 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons3.wvr.c [2024-11-07 19:37:50,642 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-07 19:37:50,642 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-11-07 19:37:50,642 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-07 19:37:50,688 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-07 19:37:50,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 67 transitions, 162 flow [2024-11-07 19:37:50,732 INFO L124 PetriNetUnfolderBase]: 6/63 cut-off events. [2024-11-07 19:37:50,736 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-07 19:37:50,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 63 events. 6/63 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 153 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2024-11-07 19:37:50,738 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 67 transitions, 162 flow [2024-11-07 19:37:50,742 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 62 transitions, 148 flow [2024-11-07 19:37:50,747 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 19:37:50,758 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;@429a93e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 19:37:50,760 INFO L334 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2024-11-07 19:37:50,763 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 19:37:50,763 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-07 19:37:50,763 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 19:37:50,764 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:37:50,764 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:37:50,764 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:37:50,768 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:37:50,768 INFO L85 PathProgramCache]: Analyzing trace with hash 741799, now seen corresponding path program 1 times [2024-11-07 19:37:50,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:37:50,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105643502] [2024-11-07 19:37:50,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:37:50,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:37:50,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:37:50,965 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 19:37:50,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:37:50,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105643502] [2024-11-07 19:37:50,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105643502] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:37:50,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:37:50,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-07 19:37:50,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074952434] [2024-11-07 19:37:50,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:37:50,973 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:37:50,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:37:50,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:37:50,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:37:51,004 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 67 [2024-11-07 19:37:51,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 62 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:37:51,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:37:51,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 67 [2024-11-07 19:37:51,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:37:52,102 INFO L124 PetriNetUnfolderBase]: 7841/11938 cut-off events. [2024-11-07 19:37:52,102 INFO L125 PetriNetUnfolderBase]: For 589/589 co-relation queries the response was YES. [2024-11-07 19:37:52,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23244 conditions, 11938 events. 7841/11938 cut-off events. For 589/589 co-relation queries the response was YES. Maximal size of possible extension queue 977. Compared 86985 event pairs, 6340 based on Foata normal form. 1/8027 useless extension candidates. Maximal degree in co-relation 22236. Up to 10274 conditions per place. [2024-11-07 19:37:52,232 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 39 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2024-11-07 19:37:52,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 58 transitions, 222 flow [2024-11-07 19:37:52,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:37:52,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:37:52,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 110 transitions. [2024-11-07 19:37:52,243 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5472636815920398 [2024-11-07 19:37:52,244 INFO L175 Difference]: Start difference. First operand has 69 places, 62 transitions, 148 flow. Second operand 3 states and 110 transitions. [2024-11-07 19:37:52,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 58 transitions, 222 flow [2024-11-07 19:37:52,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 58 transitions, 206 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-07 19:37:52,275 INFO L231 Difference]: Finished difference. Result has 59 places, 58 transitions, 128 flow [2024-11-07 19:37:52,277 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=59, PETRI_TRANSITIONS=58} [2024-11-07 19:37:52,281 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, -10 predicate places. [2024-11-07 19:37:52,281 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 58 transitions, 128 flow [2024-11-07 19:37:52,281 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:37:52,282 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:37:52,282 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:37:52,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-07 19:37:52,282 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:37:52,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:37:52,283 INFO L85 PathProgramCache]: Analyzing trace with hash 741800, now seen corresponding path program 1 times [2024-11-07 19:37:52,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:37:52,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215064366] [2024-11-07 19:37:52,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:37:52,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:37:52,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:37:52,535 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 19:37:52,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:37:52,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215064366] [2024-11-07 19:37:52,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215064366] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:37:52,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:37:52,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:37:52,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258579618] [2024-11-07 19:37:52,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:37:52,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:37:52,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:37:52,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:37:52,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:37:52,545 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 67 [2024-11-07 19:37:52,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 58 transitions, 128 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:37:52,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:37:52,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 67 [2024-11-07 19:37:52,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:37:53,228 INFO L124 PetriNetUnfolderBase]: 7842/11941 cut-off events. [2024-11-07 19:37:53,229 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-07 19:37:53,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22679 conditions, 11941 events. 7842/11941 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 977. Compared 87078 event pairs, 6340 based on Foata normal form. 0/8027 useless extension candidates. Maximal degree in co-relation 22650. Up to 10283 conditions per place. [2024-11-07 19:37:53,312 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 42 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2024-11-07 19:37:53,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 61 transitions, 226 flow [2024-11-07 19:37:53,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:37:53,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:37:53,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 135 transitions. [2024-11-07 19:37:53,314 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.503731343283582 [2024-11-07 19:37:53,314 INFO L175 Difference]: Start difference. First operand has 59 places, 58 transitions, 128 flow. Second operand 4 states and 135 transitions. [2024-11-07 19:37:53,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 61 transitions, 226 flow [2024-11-07 19:37:53,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 61 transitions, 222 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:37:53,317 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 151 flow [2024-11-07 19:37:53,318 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=151, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2024-11-07 19:37:53,318 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, -7 predicate places. [2024-11-07 19:37:53,318 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 151 flow [2024-11-07 19:37:53,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:37:53,319 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:37:53,319 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-07 19:37:53,319 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-07 19:37:53,319 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:37:53,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:37:53,320 INFO L85 PathProgramCache]: Analyzing trace with hash 22997769, now seen corresponding path program 1 times [2024-11-07 19:37:53,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:37:53,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701831977] [2024-11-07 19:37:53,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:37:53,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:37:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:37:53,534 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 19:37:53,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:37:53,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701831977] [2024-11-07 19:37:53,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701831977] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:37:53,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:37:53,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:37:53,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126427078] [2024-11-07 19:37:53,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:37:53,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:37:53,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:37:53,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:37:53,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:37:53,551 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 67 [2024-11-07 19:37:53,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 151 flow. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:37:53,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:37:53,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 67 [2024-11-07 19:37:53,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:37:54,302 INFO L124 PetriNetUnfolderBase]: 7843/11944 cut-off events. [2024-11-07 19:37:54,302 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-07 19:37:54,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22696 conditions, 11944 events. 7843/11944 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 977. Compared 87105 event pairs, 6340 based on Foata normal form. 0/8029 useless extension candidates. Maximal degree in co-relation 22671. Up to 10282 conditions per place. [2024-11-07 19:37:54,351 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 42 selfloop transitions, 7 changer transitions 0/64 dead transitions. [2024-11-07 19:37:54,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 64 transitions, 255 flow [2024-11-07 19:37:54,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:37:54,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:37:54,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 160 transitions. [2024-11-07 19:37:54,355 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47761194029850745 [2024-11-07 19:37:54,356 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 151 flow. Second operand 5 states and 160 transitions. [2024-11-07 19:37:54,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 64 transitions, 255 flow [2024-11-07 19:37:54,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 64 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:37:54,358 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 185 flow [2024-11-07 19:37:54,358 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=185, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2024-11-07 19:37:54,359 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, -2 predicate places. [2024-11-07 19:37:54,359 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 185 flow [2024-11-07 19:37:54,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:37:54,360 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:37:54,360 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-07 19:37:54,360 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-07 19:37:54,360 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:37:54,361 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:37:54,361 INFO L85 PathProgramCache]: Analyzing trace with hash 712893733, now seen corresponding path program 1 times [2024-11-07 19:37:54,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:37:54,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140243197] [2024-11-07 19:37:54,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:37:54,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:37:54,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:37:54,543 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 19:37:54,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:37:54,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140243197] [2024-11-07 19:37:54,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140243197] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:37:54,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917253053] [2024-11-07 19:37:54,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:37:54,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:37:54,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:37:54,546 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 19:37:54,547 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 19:37:54,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:37:54,606 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-07 19:37:54,608 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:37:54,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-07 19:37:54,758 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 19:37:54,758 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:37:54,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:37:54,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917253053] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:37:54,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:37:54,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-07 19:37:54,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271314171] [2024-11-07 19:37:54,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:37:54,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-07 19:37:54,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:37:54,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-07 19:37:54,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-07 19:37:54,866 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 67 [2024-11-07 19:37:54,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 185 flow. Second operand has 11 states, 11 states have (on average 23.363636363636363) internal successors, (257), 11 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:37:54,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:37:54,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 67 [2024-11-07 19:37:54,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:37:55,552 INFO L124 PetriNetUnfolderBase]: 7844/11946 cut-off events. [2024-11-07 19:37:55,552 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-11-07 19:37:55,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22719 conditions, 11946 events. 7844/11946 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 977. Compared 87114 event pairs, 6340 based on Foata normal form. 0/8034 useless extension candidates. Maximal degree in co-relation 22681. Up to 10283 conditions per place. [2024-11-07 19:37:55,603 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 41 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-11-07 19:37:55,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 66 transitions, 298 flow [2024-11-07 19:37:55,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-07 19:37:55,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-07 19:37:55,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-11-07 19:37:55,605 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4216417910447761 [2024-11-07 19:37:55,605 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 185 flow. Second operand 8 states and 226 transitions. [2024-11-07 19:37:55,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 66 transitions, 298 flow [2024-11-07 19:37:55,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 66 transitions, 297 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:37:55,608 INFO L231 Difference]: Finished difference. Result has 72 places, 66 transitions, 215 flow [2024-11-07 19:37:55,608 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=215, PETRI_PLACES=72, PETRI_TRANSITIONS=66} [2024-11-07 19:37:55,609 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 3 predicate places. [2024-11-07 19:37:55,609 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 66 transitions, 215 flow [2024-11-07 19:37:55,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 23.363636363636363) internal successors, (257), 11 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:37:55,609 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:37:55,609 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-07 19:37:55,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-07 19:37:55,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:37:55,814 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:37:55,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:37:55,814 INFO L85 PathProgramCache]: Analyzing trace with hash 626042671, now seen corresponding path program 1 times [2024-11-07 19:37:55,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:37:55,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009713989] [2024-11-07 19:37:55,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:37:55,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:37:55,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:37:56,008 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 19:37:56,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:37:56,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009713989] [2024-11-07 19:37:56,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009713989] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:37:56,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745996920] [2024-11-07 19:37:56,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:37:56,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:37:56,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:37:56,011 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 19:37:56,012 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 19:37:56,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:37:56,072 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-07 19:37:56,073 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:37:56,088 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-07 19:37:56,178 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 19:37:56,178 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:37:56,277 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 19:37:56,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745996920] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:37:56,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:37:56,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-07 19:37:56,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504766130] [2024-11-07 19:37:56,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:37:56,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-07 19:37:56,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:37:56,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-07 19:37:56,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-07 19:37:56,328 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 67 [2024-11-07 19:37:56,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 66 transitions, 215 flow. Second operand has 13 states, 13 states have (on average 23.307692307692307) internal successors, (303), 13 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:37:56,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:37:56,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 67 [2024-11-07 19:37:56,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:37:57,302 INFO L124 PetriNetUnfolderBase]: 7845/11948 cut-off events. [2024-11-07 19:37:57,302 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2024-11-07 19:37:57,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22735 conditions, 11948 events. 7845/11948 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 977. Compared 87118 event pairs, 6340 based on Foata normal form. 0/8036 useless extension candidates. Maximal degree in co-relation 22689. Up to 10275 conditions per place. [2024-11-07 19:37:57,373 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 35 selfloop transitions, 18 changer transitions 0/68 dead transitions. [2024-11-07 19:37:57,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 68 transitions, 329 flow [2024-11-07 19:37:57,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:37:57,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:37:57,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 253 transitions. [2024-11-07 19:37:57,375 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41956882255389716 [2024-11-07 19:37:57,375 INFO L175 Difference]: Start difference. First operand has 72 places, 66 transitions, 215 flow. Second operand 9 states and 253 transitions. [2024-11-07 19:37:57,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 68 transitions, 329 flow [2024-11-07 19:37:57,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 68 transitions, 282 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-07 19:37:57,376 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 212 flow [2024-11-07 19:37:57,377 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=212, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2024-11-07 19:37:57,377 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 2 predicate places. [2024-11-07 19:37:57,377 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 212 flow [2024-11-07 19:37:57,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 23.307692307692307) internal successors, (303), 13 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:37:57,378 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:37:57,378 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:37:57,391 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 19:37:57,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:37:57,579 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:37:57,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:37:57,579 INFO L85 PathProgramCache]: Analyzing trace with hash -267135375, now seen corresponding path program 1 times [2024-11-07 19:37:57,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:37:57,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316219126] [2024-11-07 19:37:57,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:37:57,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:37:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:37:57,636 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 19:37:57,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:37:57,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316219126] [2024-11-07 19:37:57,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316219126] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:37:57,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:37:57,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:37:57,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967830177] [2024-11-07 19:37:57,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:37:57,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:37:57,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:37:57,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:37:57,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:37:57,642 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 67 [2024-11-07 19:37:57,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:37:57,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:37:57,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 67 [2024-11-07 19:37:57,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:37:58,269 INFO L124 PetriNetUnfolderBase]: 8974/13584 cut-off events. [2024-11-07 19:37:58,269 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-07 19:37:58,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26098 conditions, 13584 events. 8974/13584 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 1012. Compared 98408 event pairs, 7442 based on Foata normal form. 264/9765 useless extension candidates. Maximal degree in co-relation 22422. Up to 10289 conditions per place. [2024-11-07 19:37:58,322 INFO L140 encePairwiseOnDemand]: 56/67 looper letters, 81 selfloop transitions, 5 changer transitions 0/101 dead transitions. [2024-11-07 19:37:58,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 101 transitions, 496 flow [2024-11-07 19:37:58,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:37:58,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:37:58,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 200 transitions. [2024-11-07 19:37:58,323 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5970149253731343 [2024-11-07 19:37:58,323 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 212 flow. Second operand 5 states and 200 transitions. [2024-11-07 19:37:58,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 101 transitions, 496 flow [2024-11-07 19:37:58,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 101 transitions, 443 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-11-07 19:37:58,325 INFO L231 Difference]: Finished difference. Result has 72 places, 70 transitions, 218 flow [2024-11-07 19:37:58,325 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=72, PETRI_TRANSITIONS=70} [2024-11-07 19:37:58,326 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 3 predicate places. [2024-11-07 19:37:58,326 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 70 transitions, 218 flow [2024-11-07 19:37:58,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:37:58,326 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:37:58,326 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:37:58,326 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-07 19:37:58,326 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:37:58,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:37:58,326 INFO L85 PathProgramCache]: Analyzing trace with hash 91691054, now seen corresponding path program 1 times [2024-11-07 19:37:58,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:37:58,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617418385] [2024-11-07 19:37:58,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:37:58,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:37:58,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:37:58,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:37:58,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:37:58,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617418385] [2024-11-07 19:37:58,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617418385] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:37:58,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974588007] [2024-11-07 19:37:58,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:37:58,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:37:58,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:37:58,506 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 19:37:58,507 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 19:37:58,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:37:58,566 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-07 19:37:58,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:37:58,573 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 19:37:58,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-07 19:37:58,612 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 18 treesize of output 13 [2024-11-07 19:37:58,623 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-07 19:37:58,624 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 19:37:58,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:37:58,652 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-07 19:37:58,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974588007] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:37:58,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-07 19:37:58,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 6 [2024-11-07 19:37:58,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40148746] [2024-11-07 19:37:58,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:37:58,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:37:58,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:37:58,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:37:58,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-11-07 19:37:58,662 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 67 [2024-11-07 19:37:58,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 70 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:37:58,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:37:58,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 67 [2024-11-07 19:37:58,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:37:59,090 INFO L124 PetriNetUnfolderBase]: 6994/10942 cut-off events. [2024-11-07 19:37:59,090 INFO L125 PetriNetUnfolderBase]: For 808/808 co-relation queries the response was YES. [2024-11-07 19:37:59,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22343 conditions, 10942 events. 6994/10942 cut-off events. For 808/808 co-relation queries the response was YES. Maximal size of possible extension queue 758. Compared 78756 event pairs, 5898 based on Foata normal form. 0/8156 useless extension candidates. Maximal degree in co-relation 18707. Up to 9373 conditions per place. [2024-11-07 19:37:59,124 INFO L140 encePairwiseOnDemand]: 63/67 looper letters, 49 selfloop transitions, 4 changer transitions 0/68 dead transitions. [2024-11-07 19:37:59,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 68 transitions, 316 flow [2024-11-07 19:37:59,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:37:59,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:37:59,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-11-07 19:37:59,126 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48134328358208955 [2024-11-07 19:37:59,126 INFO L175 Difference]: Start difference. First operand has 72 places, 70 transitions, 218 flow. Second operand 4 states and 129 transitions. [2024-11-07 19:37:59,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 68 transitions, 316 flow [2024-11-07 19:37:59,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 68 transitions, 311 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:37:59,127 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 213 flow [2024-11-07 19:37:59,127 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=213, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2024-11-07 19:37:59,128 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 2 predicate places. [2024-11-07 19:37:59,128 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 213 flow [2024-11-07 19:37:59,128 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:37:59,128 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:37:59,128 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:37:59,141 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 19:37:59,329 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 19:37:59,329 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:37:59,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:37:59,329 INFO L85 PathProgramCache]: Analyzing trace with hash 91691053, now seen corresponding path program 1 times [2024-11-07 19:37:59,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:37:59,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211101107] [2024-11-07 19:37:59,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:37:59,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:37:59,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:37:59,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:37:59,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:37:59,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211101107] [2024-11-07 19:37:59,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211101107] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:37:59,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:37:59,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:37:59,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401731175] [2024-11-07 19:37:59,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:37:59,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:37:59,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:37:59,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:37:59,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:37:59,394 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 67 [2024-11-07 19:37:59,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 213 flow. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:37:59,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:37:59,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 67 [2024-11-07 19:37:59,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:37:59,715 INFO L124 PetriNetUnfolderBase]: 5302/8448 cut-off events. [2024-11-07 19:37:59,715 INFO L125 PetriNetUnfolderBase]: For 698/698 co-relation queries the response was YES. [2024-11-07 19:37:59,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16695 conditions, 8448 events. 5302/8448 cut-off events. For 698/698 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 58565 event pairs, 4566 based on Foata normal form. 0/6819 useless extension candidates. Maximal degree in co-relation 13039. Up to 7180 conditions per place. [2024-11-07 19:37:59,751 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 43 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2024-11-07 19:37:59,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 66 transitions, 307 flow [2024-11-07 19:37:59,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:37:59,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:37:59,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-11-07 19:37:59,753 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44477611940298506 [2024-11-07 19:37:59,753 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 213 flow. Second operand 5 states and 149 transitions. [2024-11-07 19:37:59,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 66 transitions, 307 flow [2024-11-07 19:37:59,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 66 transitions, 302 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:37:59,754 INFO L231 Difference]: Finished difference. Result has 71 places, 66 transitions, 216 flow [2024-11-07 19:37:59,754 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=216, PETRI_PLACES=71, PETRI_TRANSITIONS=66} [2024-11-07 19:37:59,755 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 2 predicate places. [2024-11-07 19:37:59,755 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 66 transitions, 216 flow [2024-11-07 19:37:59,755 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:37:59,755 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:37:59,755 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:37:59,755 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-07 19:37:59,755 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:37:59,755 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:37:59,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1704488768, now seen corresponding path program 1 times [2024-11-07 19:37:59,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:37:59,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042835525] [2024-11-07 19:37:59,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:37:59,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:37:59,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:37:59,788 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 19:37:59,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:37:59,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042835525] [2024-11-07 19:37:59,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042835525] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:37:59,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:37:59,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-07 19:37:59,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409881414] [2024-11-07 19:37:59,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:37:59,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:37:59,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:37:59,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:37:59,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:37:59,789 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 67 [2024-11-07 19:37:59,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 66 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:37:59,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:37:59,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 67 [2024-11-07 19:37:59,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:38:00,171 INFO L124 PetriNetUnfolderBase]: 5654/8603 cut-off events. [2024-11-07 19:38:00,171 INFO L125 PetriNetUnfolderBase]: For 678/678 co-relation queries the response was YES. [2024-11-07 19:38:00,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17259 conditions, 8603 events. 5654/8603 cut-off events. For 678/678 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 53035 event pairs, 2351 based on Foata normal form. 180/7128 useless extension candidates. Maximal degree in co-relation 15373. Up to 4588 conditions per place. [2024-11-07 19:38:00,198 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 72 selfloop transitions, 2 changer transitions 0/89 dead transitions. [2024-11-07 19:38:00,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 89 transitions, 420 flow [2024-11-07 19:38:00,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:38:00,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:38:00,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2024-11-07 19:38:00,200 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6716417910447762 [2024-11-07 19:38:00,200 INFO L175 Difference]: Start difference. First operand has 71 places, 66 transitions, 216 flow. Second operand 3 states and 135 transitions. [2024-11-07 19:38:00,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 89 transitions, 420 flow [2024-11-07 19:38:00,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 89 transitions, 408 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:38:00,201 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 220 flow [2024-11-07 19:38:00,201 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2024-11-07 19:38:00,202 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 2 predicate places. [2024-11-07 19:38:00,202 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 220 flow [2024-11-07 19:38:00,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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 19:38:00,202 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:38:00,202 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:38:00,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-07 19:38:00,202 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:38:00,203 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:38:00,203 INFO L85 PathProgramCache]: Analyzing trace with hash 677378861, now seen corresponding path program 1 times [2024-11-07 19:38:00,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:38:00,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858452376] [2024-11-07 19:38:00,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:38:00,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:38:00,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:38:00,248 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 19:38:00,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:38:00,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858452376] [2024-11-07 19:38:00,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858452376] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:38:00,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:38:00,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:38:00,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252119853] [2024-11-07 19:38:00,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:38:00,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:38:00,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:38:00,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:38:00,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:38:00,249 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 67 [2024-11-07 19:38:00,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 19:38:00,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:38:00,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 67 [2024-11-07 19:38:00,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:38:00,571 INFO L124 PetriNetUnfolderBase]: 5347/8363 cut-off events. [2024-11-07 19:38:00,571 INFO L125 PetriNetUnfolderBase]: For 996/996 co-relation queries the response was YES. [2024-11-07 19:38:00,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17734 conditions, 8363 events. 5347/8363 cut-off events. For 996/996 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 50219 event pairs, 2210 based on Foata normal form. 74/7419 useless extension candidates. Maximal degree in co-relation 15850. Up to 5580 conditions per place. [2024-11-07 19:38:00,603 INFO L140 encePairwiseOnDemand]: 64/67 looper letters, 70 selfloop transitions, 2 changer transitions 0/87 dead transitions. [2024-11-07 19:38:00,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 87 transitions, 413 flow [2024-11-07 19:38:00,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:38:00,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:38:00,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 130 transitions. [2024-11-07 19:38:00,604 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6467661691542289 [2024-11-07 19:38:00,604 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 220 flow. Second operand 3 states and 130 transitions. [2024-11-07 19:38:00,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 87 transitions, 413 flow [2024-11-07 19:38:00,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 87 transitions, 411 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:38:00,606 INFO L231 Difference]: Finished difference. Result has 73 places, 68 transitions, 232 flow [2024-11-07 19:38:00,606 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=73, PETRI_TRANSITIONS=68} [2024-11-07 19:38:00,607 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 4 predicate places. [2024-11-07 19:38:00,607 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 68 transitions, 232 flow [2024-11-07 19:38:00,607 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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 19:38:00,607 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:38:00,607 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 19:38:00,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-07 19:38:00,607 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:38:00,607 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:38:00,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1448779813, now seen corresponding path program 1 times [2024-11-07 19:38:00,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:38:00,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227531251] [2024-11-07 19:38:00,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:38:00,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:38:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:38:00,681 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 19:38:00,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:38:00,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227531251] [2024-11-07 19:38:00,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227531251] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:38:00,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:38:00,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:38:00,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945335140] [2024-11-07 19:38:00,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:38:00,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:38:00,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:38:00,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:38:00,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:38:00,688 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 67 [2024-11-07 19:38:00,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 68 transitions, 232 flow. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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 19:38:00,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:38:00,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 67 [2024-11-07 19:38:00,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:38:01,301 INFO L124 PetriNetUnfolderBase]: 7387/12042 cut-off events. [2024-11-07 19:38:01,301 INFO L125 PetriNetUnfolderBase]: For 2990/3001 co-relation queries the response was YES. [2024-11-07 19:38:01,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25565 conditions, 12042 events. 7387/12042 cut-off events. For 2990/3001 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 82167 event pairs, 6127 based on Foata normal form. 172/10893 useless extension candidates. Maximal degree in co-relation 21869. Up to 7217 conditions per place. [2024-11-07 19:38:01,350 INFO L140 encePairwiseOnDemand]: 61/67 looper letters, 71 selfloop transitions, 7 changer transitions 0/93 dead transitions. [2024-11-07 19:38:01,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 93 transitions, 459 flow [2024-11-07 19:38:01,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:38:01,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:38:01,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 163 transitions. [2024-11-07 19:38:01,351 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6082089552238806 [2024-11-07 19:38:01,351 INFO L175 Difference]: Start difference. First operand has 73 places, 68 transitions, 232 flow. Second operand 4 states and 163 transitions. [2024-11-07 19:38:01,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 93 transitions, 459 flow [2024-11-07 19:38:01,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 93 transitions, 448 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-07 19:38:01,355 INFO L231 Difference]: Finished difference. Result has 76 places, 68 transitions, 248 flow [2024-11-07 19:38:01,355 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=248, PETRI_PLACES=76, PETRI_TRANSITIONS=68} [2024-11-07 19:38:01,356 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 7 predicate places. [2024-11-07 19:38:01,356 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 68 transitions, 248 flow [2024-11-07 19:38:01,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 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 19:38:01,356 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:38:01,356 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:38:01,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-07 19:38:01,356 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:38:01,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:38:01,356 INFO L85 PathProgramCache]: Analyzing trace with hash -612879199, now seen corresponding path program 1 times [2024-11-07 19:38:01,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:38:01,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295060020] [2024-11-07 19:38:01,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:38:01,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:38:01,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:38:01,546 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 19:38:01,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:38:01,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295060020] [2024-11-07 19:38:01,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295060020] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:38:01,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199678805] [2024-11-07 19:38:01,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:38:01,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:38:01,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:38:01,549 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 19:38:01,550 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 19:38:01,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:38:01,625 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-07 19:38:01,626 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:38:01,711 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 19:38:01,711 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-07 19:38:01,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199678805] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:38:01,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-07 19:38:01,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-07 19:38:01,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687014816] [2024-11-07 19:38:01,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:38:01,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:38:01,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:38:01,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:38:01,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-07 19:38:01,727 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 67 [2024-11-07 19:38:01,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 68 transitions, 248 flow. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 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 19:38:01,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:38:01,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 67 [2024-11-07 19:38:01,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:38:02,300 INFO L124 PetriNetUnfolderBase]: 6193/10414 cut-off events. [2024-11-07 19:38:02,300 INFO L125 PetriNetUnfolderBase]: For 1612/1634 co-relation queries the response was YES. [2024-11-07 19:38:02,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21289 conditions, 10414 events. 6193/10414 cut-off events. For 1612/1634 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 72785 event pairs, 5251 based on Foata normal form. 0/9603 useless extension candidates. Maximal degree in co-relation 17587. Up to 8505 conditions per place. [2024-11-07 19:38:02,347 INFO L140 encePairwiseOnDemand]: 63/67 looper letters, 44 selfloop transitions, 7 changer transitions 0/66 dead transitions. [2024-11-07 19:38:02,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 66 transitions, 342 flow [2024-11-07 19:38:02,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:38:02,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:38:02,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 133 transitions. [2024-11-07 19:38:02,349 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4962686567164179 [2024-11-07 19:38:02,349 INFO L175 Difference]: Start difference. First operand has 76 places, 68 transitions, 248 flow. Second operand 4 states and 133 transitions. [2024-11-07 19:38:02,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 66 transitions, 342 flow [2024-11-07 19:38:02,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 66 transitions, 337 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:38:02,351 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 249 flow [2024-11-07 19:38:02,351 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=249, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2024-11-07 19:38:02,352 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 7 predicate places. [2024-11-07 19:38:02,352 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 249 flow [2024-11-07 19:38:02,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 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 19:38:02,352 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:38:02,352 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:38:02,364 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 19:38:02,556 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 19:38:02,556 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:38:02,557 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:38:02,557 INFO L85 PathProgramCache]: Analyzing trace with hash -612879200, now seen corresponding path program 1 times [2024-11-07 19:38:02,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:38:02,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189410635] [2024-11-07 19:38:02,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:38:02,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:38:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:38:02,607 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 19:38:02,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:38:02,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189410635] [2024-11-07 19:38:02,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189410635] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:38:02,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:38:02,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:38:02,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156280640] [2024-11-07 19:38:02,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:38:02,608 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:38:02,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:38:02,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:38:02,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:38:02,618 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 67 [2024-11-07 19:38:02,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 249 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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 19:38:02,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:38:02,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 67 [2024-11-07 19:38:02,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:38:02,938 INFO L124 PetriNetUnfolderBase]: 5205/9044 cut-off events. [2024-11-07 19:38:02,938 INFO L125 PetriNetUnfolderBase]: For 1414/1431 co-relation queries the response was YES. [2024-11-07 19:38:02,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17972 conditions, 9044 events. 5205/9044 cut-off events. For 1414/1431 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 64959 event pairs, 4517 based on Foata normal form. 198/8673 useless extension candidates. Maximal degree in co-relation 14265. Up to 7213 conditions per place. [2024-11-07 19:38:03,013 INFO L140 encePairwiseOnDemand]: 63/67 looper letters, 44 selfloop transitions, 5 changer transitions 0/64 dead transitions. [2024-11-07 19:38:03,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 64 transitions, 339 flow [2024-11-07 19:38:03,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:38:03,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:38:03,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-11-07 19:38:03,014 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.458955223880597 [2024-11-07 19:38:03,014 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 249 flow. Second operand 4 states and 123 transitions. [2024-11-07 19:38:03,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 64 transitions, 339 flow [2024-11-07 19:38:03,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 64 transitions, 329 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:38:03,015 INFO L231 Difference]: Finished difference. Result has 75 places, 64 transitions, 241 flow [2024-11-07 19:38:03,016 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=241, PETRI_PLACES=75, PETRI_TRANSITIONS=64} [2024-11-07 19:38:03,016 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 6 predicate places. [2024-11-07 19:38:03,016 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 64 transitions, 241 flow [2024-11-07 19:38:03,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 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 19:38:03,016 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:38:03,016 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:38:03,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-07 19:38:03,016 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:38:03,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:38:03,017 INFO L85 PathProgramCache]: Analyzing trace with hash -2004598816, now seen corresponding path program 1 times [2024-11-07 19:38:03,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:38:03,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062499969] [2024-11-07 19:38:03,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:38:03,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:38:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:38:03,075 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 19:38:03,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:38:03,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062499969] [2024-11-07 19:38:03,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062499969] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:38:03,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:38:03,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:38:03,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941563983] [2024-11-07 19:38:03,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:38:03,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:38:03,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:38:03,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:38:03,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:38:03,089 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 67 [2024-11-07 19:38:03,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 64 transitions, 241 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 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 19:38:03,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:38:03,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 67 [2024-11-07 19:38:03,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:38:03,519 INFO L124 PetriNetUnfolderBase]: 8061/12379 cut-off events. [2024-11-07 19:38:03,519 INFO L125 PetriNetUnfolderBase]: For 2001/2001 co-relation queries the response was YES. [2024-11-07 19:38:03,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25817 conditions, 12379 events. 8061/12379 cut-off events. For 2001/2001 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 75856 event pairs, 1483 based on Foata normal form. 430/12555 useless extension candidates. Maximal degree in co-relation 20267. Up to 6696 conditions per place. [2024-11-07 19:38:03,566 INFO L140 encePairwiseOnDemand]: 63/67 looper letters, 80 selfloop transitions, 4 changer transitions 0/96 dead transitions. [2024-11-07 19:38:03,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 96 transitions, 499 flow [2024-11-07 19:38:03,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:38:03,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:38:03,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 150 transitions. [2024-11-07 19:38:03,567 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5597014925373134 [2024-11-07 19:38:03,567 INFO L175 Difference]: Start difference. First operand has 75 places, 64 transitions, 241 flow. Second operand 4 states and 150 transitions. [2024-11-07 19:38:03,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 96 transitions, 499 flow [2024-11-07 19:38:03,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 96 transitions, 493 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:38:03,569 INFO L231 Difference]: Finished difference. Result has 78 places, 66 transitions, 256 flow [2024-11-07 19:38:03,569 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=256, PETRI_PLACES=78, PETRI_TRANSITIONS=66} [2024-11-07 19:38:03,570 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 9 predicate places. [2024-11-07 19:38:03,570 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 66 transitions, 256 flow [2024-11-07 19:38:03,570 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 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 19:38:03,570 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:38:03,570 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:38:03,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-07 19:38:03,570 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:38:03,570 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:38:03,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1156607850, now seen corresponding path program 2 times [2024-11-07 19:38:03,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:38:03,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955952884] [2024-11-07 19:38:03,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:38:03,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:38:03,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:38:03,630 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 19:38:03,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:38:03,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955952884] [2024-11-07 19:38:03,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955952884] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:38:03,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:38:03,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:38:03,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801129498] [2024-11-07 19:38:03,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:38:03,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:38:03,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:38:03,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:38:03,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:38:03,640 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 67 [2024-11-07 19:38:03,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 66 transitions, 256 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 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 19:38:03,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:38:03,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 67 [2024-11-07 19:38:03,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:38:04,093 INFO L124 PetriNetUnfolderBase]: 7864/11931 cut-off events. [2024-11-07 19:38:04,094 INFO L125 PetriNetUnfolderBase]: For 3186/3513 co-relation queries the response was YES. [2024-11-07 19:38:04,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26852 conditions, 11931 events. 7864/11931 cut-off events. For 3186/3513 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 70326 event pairs, 1763 based on Foata normal form. 599/12306 useless extension candidates. Maximal degree in co-relation 21887. Up to 7842 conditions per place. [2024-11-07 19:38:04,151 INFO L140 encePairwiseOnDemand]: 63/67 looper letters, 79 selfloop transitions, 6 changer transitions 0/98 dead transitions. [2024-11-07 19:38:04,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 98 transitions, 529 flow [2024-11-07 19:38:04,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:38:04,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:38:04,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 148 transitions. [2024-11-07 19:38:04,151 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5522388059701493 [2024-11-07 19:38:04,152 INFO L175 Difference]: Start difference. First operand has 78 places, 66 transitions, 256 flow. Second operand 4 states and 148 transitions. [2024-11-07 19:38:04,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 98 transitions, 529 flow [2024-11-07 19:38:04,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 98 transitions, 524 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:38:04,155 INFO L231 Difference]: Finished difference. Result has 82 places, 69 transitions, 286 flow [2024-11-07 19:38:04,155 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=286, PETRI_PLACES=82, PETRI_TRANSITIONS=69} [2024-11-07 19:38:04,155 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 13 predicate places. [2024-11-07 19:38:04,155 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 69 transitions, 286 flow [2024-11-07 19:38:04,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 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 19:38:04,156 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:38:04,156 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:38:04,156 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-07 19:38:04,156 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:38:04,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:38:04,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1196721288, now seen corresponding path program 3 times [2024-11-07 19:38:04,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:38:04,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535216256] [2024-11-07 19:38:04,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:38:04,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:38:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:38:04,238 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 19:38:04,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:38:04,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535216256] [2024-11-07 19:38:04,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535216256] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:38:04,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:38:04,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:38:04,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138274692] [2024-11-07 19:38:04,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:38:04,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:38:04,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:38:04,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:38:04,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:38:04,252 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 67 [2024-11-07 19:38:04,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 69 transitions, 286 flow. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:38:04,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:38:04,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 67 [2024-11-07 19:38:04,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:38:04,977 INFO L124 PetriNetUnfolderBase]: 10490/15926 cut-off events. [2024-11-07 19:38:04,977 INFO L125 PetriNetUnfolderBase]: For 8368/8536 co-relation queries the response was YES. [2024-11-07 19:38:05,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39348 conditions, 15926 events. 10490/15926 cut-off events. For 8368/8536 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 96327 event pairs, 2376 based on Foata normal form. 454/16148 useless extension candidates. Maximal degree in co-relation 30963. Up to 8755 conditions per place. [2024-11-07 19:38:05,050 INFO L140 encePairwiseOnDemand]: 59/67 looper letters, 112 selfloop transitions, 11 changer transitions 0/133 dead transitions. [2024-11-07 19:38:05,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 133 transitions, 737 flow [2024-11-07 19:38:05,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:38:05,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:38:05,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 213 transitions. [2024-11-07 19:38:05,051 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5298507462686567 [2024-11-07 19:38:05,051 INFO L175 Difference]: Start difference. First operand has 82 places, 69 transitions, 286 flow. Second operand 6 states and 213 transitions. [2024-11-07 19:38:05,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 133 transitions, 737 flow [2024-11-07 19:38:05,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 133 transitions, 731 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:38:05,058 INFO L231 Difference]: Finished difference. Result has 88 places, 74 transitions, 341 flow [2024-11-07 19:38:05,058 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=341, PETRI_PLACES=88, PETRI_TRANSITIONS=74} [2024-11-07 19:38:05,058 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 19 predicate places. [2024-11-07 19:38:05,059 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 74 transitions, 341 flow [2024-11-07 19:38:05,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:38:05,059 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:38:05,059 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:38:05,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-07 19:38:05,059 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:38:05,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:38:05,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1006149498, now seen corresponding path program 4 times [2024-11-07 19:38:05,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:38:05,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156190927] [2024-11-07 19:38:05,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:38:05,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:38:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:38:05,130 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 19:38:05,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:38:05,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156190927] [2024-11-07 19:38:05,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156190927] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:38:05,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:38:05,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:38:05,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259389689] [2024-11-07 19:38:05,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:38:05,131 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:38:05,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:38:05,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:38:05,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:38:05,155 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 67 [2024-11-07 19:38:05,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 74 transitions, 341 flow. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 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 19:38:05,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:38:05,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 67 [2024-11-07 19:38:05,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:38:05,940 INFO L124 PetriNetUnfolderBase]: 10957/17344 cut-off events. [2024-11-07 19:38:05,940 INFO L125 PetriNetUnfolderBase]: For 15361/15732 co-relation queries the response was YES. [2024-11-07 19:38:05,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44357 conditions, 17344 events. 10957/17344 cut-off events. For 15361/15732 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 114121 event pairs, 2066 based on Foata normal form. 830/17943 useless extension candidates. Maximal degree in co-relation 35515. Up to 7857 conditions per place. [2024-11-07 19:38:06,003 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 94 selfloop transitions, 10 changer transitions 0/118 dead transitions. [2024-11-07 19:38:06,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 118 transitions, 692 flow [2024-11-07 19:38:06,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:38:06,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:38:06,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 183 transitions. [2024-11-07 19:38:06,004 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5462686567164179 [2024-11-07 19:38:06,004 INFO L175 Difference]: Start difference. First operand has 88 places, 74 transitions, 341 flow. Second operand 5 states and 183 transitions. [2024-11-07 19:38:06,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 118 transitions, 692 flow [2024-11-07 19:38:06,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 118 transitions, 677 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:38:06,023 INFO L231 Difference]: Finished difference. Result has 90 places, 75 transitions, 361 flow [2024-11-07 19:38:06,023 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=361, PETRI_PLACES=90, PETRI_TRANSITIONS=75} [2024-11-07 19:38:06,023 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 21 predicate places. [2024-11-07 19:38:06,023 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 75 transitions, 361 flow [2024-11-07 19:38:06,024 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 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 19:38:06,024 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:38:06,024 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:38:06,024 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-07 19:38:06,024 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:38:06,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:38:06,024 INFO L85 PathProgramCache]: Analyzing trace with hash -172132478, now seen corresponding path program 5 times [2024-11-07 19:38:06,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:38:06,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591132098] [2024-11-07 19:38:06,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:38:06,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:38:06,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:38:06,124 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 19:38:06,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:38:06,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591132098] [2024-11-07 19:38:06,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591132098] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:38:06,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:38:06,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:38:06,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183081202] [2024-11-07 19:38:06,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:38:06,125 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:38:06,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:38:06,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:38:06,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:38:06,136 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 67 [2024-11-07 19:38:06,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 75 transitions, 361 flow. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 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 19:38:06,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:38:06,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 67 [2024-11-07 19:38:06,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:38:07,118 INFO L124 PetriNetUnfolderBase]: 12331/19420 cut-off events. [2024-11-07 19:38:07,118 INFO L125 PetriNetUnfolderBase]: For 21648/22484 co-relation queries the response was YES. [2024-11-07 19:38:07,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50397 conditions, 19420 events. 12331/19420 cut-off events. For 21648/22484 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 130797 event pairs, 7710 based on Foata normal form. 381/18732 useless extension candidates. Maximal degree in co-relation 43766. Up to 11998 conditions per place. [2024-11-07 19:38:07,166 INFO L140 encePairwiseOnDemand]: 62/67 looper letters, 73 selfloop transitions, 6 changer transitions 13/111 dead transitions. [2024-11-07 19:38:07,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 111 transitions, 677 flow [2024-11-07 19:38:07,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:38:07,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:38:07,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 182 transitions. [2024-11-07 19:38:07,167 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5432835820895522 [2024-11-07 19:38:07,167 INFO L175 Difference]: Start difference. First operand has 90 places, 75 transitions, 361 flow. Second operand 5 states and 182 transitions. [2024-11-07 19:38:07,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 111 transitions, 677 flow [2024-11-07 19:38:07,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 111 transitions, 658 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-07 19:38:07,199 INFO L231 Difference]: Finished difference. Result has 93 places, 73 transitions, 348 flow [2024-11-07 19:38:07,199 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=348, PETRI_PLACES=93, PETRI_TRANSITIONS=73} [2024-11-07 19:38:07,199 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 24 predicate places. [2024-11-07 19:38:07,199 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 73 transitions, 348 flow [2024-11-07 19:38:07,199 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 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 19:38:07,199 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:38:07,199 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:38:07,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-07 19:38:07,199 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:38:07,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:38:07,199 INFO L85 PathProgramCache]: Analyzing trace with hash -164646972, now seen corresponding path program 1 times [2024-11-07 19:38:07,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:38:07,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879620778] [2024-11-07 19:38:07,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:38:07,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:38:07,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:38:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:38:08,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:38:08,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879620778] [2024-11-07 19:38:08,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879620778] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:38:08,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958339826] [2024-11-07 19:38:08,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:38:08,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:38:08,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:38:08,027 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 19:38:08,029 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 19:38:08,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:38:08,121 INFO L255 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-07 19:38:08,123 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:38:08,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-07 19:38:08,621 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:38:08,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2024-11-07 19:38:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:38:08,702 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:38:09,423 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:38:09,423 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 150 [2024-11-07 19:38:09,438 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:38:09,438 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 35 treesize of output 31 [2024-11-07 19:38:09,557 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:38:09,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 130 treesize of output 168 [2024-11-07 19:38:09,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:38:09,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958339826] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:38:09,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:38:09,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 37 [2024-11-07 19:38:09,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685026329] [2024-11-07 19:38:09,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:38:09,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-07 19:38:09,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:38:09,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-07 19:38:09,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1251, Unknown=0, NotChecked=0, Total=1406 [2024-11-07 19:38:10,327 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 67 [2024-11-07 19:38:10,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 73 transitions, 348 flow. Second operand has 38 states, 38 states have (on average 23.842105263157894) internal successors, (906), 38 states have internal predecessors, (906), 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 19:38:10,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:38:10,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 67 [2024-11-07 19:38:10,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:38:18,593 INFO L124 PetriNetUnfolderBase]: 49481/74019 cut-off events. [2024-11-07 19:38:18,593 INFO L125 PetriNetUnfolderBase]: For 75341/79328 co-relation queries the response was YES. [2024-11-07 19:38:18,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197124 conditions, 74019 events. 49481/74019 cut-off events. For 75341/79328 co-relation queries the response was YES. Maximal size of possible extension queue 2575. Compared 554074 event pairs, 3849 based on Foata normal form. 990/69958 useless extension candidates. Maximal degree in co-relation 171733. Up to 9030 conditions per place. [2024-11-07 19:38:18,932 INFO L140 encePairwiseOnDemand]: 49/67 looper letters, 452 selfloop transitions, 147 changer transitions 281/898 dead transitions. [2024-11-07 19:38:18,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 898 transitions, 5609 flow [2024-11-07 19:38:18,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-07 19:38:18,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2024-11-07 19:38:18,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 1955 transitions. [2024-11-07 19:38:18,936 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5210554371002132 [2024-11-07 19:38:18,936 INFO L175 Difference]: Start difference. First operand has 93 places, 73 transitions, 348 flow. Second operand 56 states and 1955 transitions. [2024-11-07 19:38:18,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 898 transitions, 5609 flow [2024-11-07 19:38:19,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 898 transitions, 5531 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-11-07 19:38:19,028 INFO L231 Difference]: Finished difference. Result has 176 places, 221 transitions, 1644 flow [2024-11-07 19:38:19,030 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=67, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=1644, PETRI_PLACES=176, PETRI_TRANSITIONS=221} [2024-11-07 19:38:19,030 INFO L277 CegarLoopForPetriNet]: 69 programPoint places, 107 predicate places. [2024-11-07 19:38:19,030 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 221 transitions, 1644 flow [2024-11-07 19:38:19,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 23.842105263157894) internal successors, (906), 38 states have internal predecessors, (906), 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 19:38:19,031 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:38:19,031 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:38:19,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-07 19:38:19,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:38:19,232 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:38:19,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:38:19,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1513282800, now seen corresponding path program 2 times [2024-11-07 19:38:19,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:38:19,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030572396] [2024-11-07 19:38:19,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:38:19,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:38:19,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:38:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:38:20,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:38:20,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030572396] [2024-11-07 19:38:20,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030572396] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:38:20,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710009133] [2024-11-07 19:38:20,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:38:20,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:38:20,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:38:20,510 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 19:38:20,511 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 19:38:20,586 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:38:20,586 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:38:20,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-11-07 19:38:20,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:38:20,600 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 19:38:20,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-07 19:38:20,680 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-07 19:38:20,680 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 19:38:20,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-07 19:38:20,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-07 19:38:21,143 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 10 [2024-11-07 19:38:21,213 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:38:21,214 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:38:22,287 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:38:22,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2024-11-07 19:38:22,298 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:38:22,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2024-11-07 19:38:22,328 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:38:22,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 123 [2024-11-07 19:38:22,894 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:38:22,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710009133] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:38:22,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:38:22,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 45 [2024-11-07 19:38:22,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647585457] [2024-11-07 19:38:22,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:38:22,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-07 19:38:22,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:38:22,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-07 19:38:22,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1826, Unknown=5, NotChecked=0, Total=2070 [2024-11-07 19:38:26,925 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-07 19:38:31,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-07 19:38:35,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-07 19:38:39,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-07 19:38:42,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-07 19:38:46,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-07 19:38:50,785 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-07 19:38:54,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-07 19:38:54,806 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 67 [2024-11-07 19:38:54,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 221 transitions, 1644 flow. Second operand has 46 states, 46 states have (on average 10.91304347826087) internal successors, (502), 46 states have internal predecessors, (502), 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 19:38:54,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:38:54,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 67 [2024-11-07 19:38:54,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:39:07,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-07 19:39:15,156 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-07 19:39:19,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]