./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-node-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4f9af400 extending candidate: java ['java'] extending candidate: /usr/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/oracle-jdk-bin-*/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/openjdk-*/bin/java ['java', '/usr/bin/java'] extending candidate: /usr/lib/jvm/java-*-openjdk-amd64/bin/java ['java', '/usr/bin/java', '/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java', '/usr/lib/jvm/java-17-openjdk-amd64/bin/java', '/usr/lib/jvm/java-11-openjdk-amd64/bin/java', '/usr/lib/jvm/java-1.17.0-openjdk-amd64/bin/java'] ['/root/.sdkman/candidates/java/21.0.5-tem/bin/java', '-Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config', '-Xmx15G', '-Xms4m', '-jar', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar', '-data', '@noDefault', '-ultimatedata', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data', '-tc', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml', '-i', '../sv-benchmarks/c/weaver/chl-node-trans.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', 'c9008ebcceff34245d74f1892a84a552f8268a9318e8a2970f14b3ec6b594daf'] Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/chl-node-trans.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 c9008ebcceff34245d74f1892a84a552f8268a9318e8a2970f14b3ec6b594daf --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-07 19:29:48,782 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-07 19:29:48,858 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-07 19:29:48,866 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-07 19:29:48,867 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-07 19:29:48,898 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-07 19:29:48,901 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-07 19:29:48,902 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-07 19:29:48,902 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-07 19:29:48,903 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-07 19:29:48,904 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-07 19:29:48,904 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-07 19:29:48,904 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-07 19:29:48,904 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-07 19:29:48,904 INFO L153 SettingsManager]: * Use SBE=true [2024-11-07 19:29:48,904 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-07 19:29:48,904 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-07 19:29:48,904 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-07 19:29:48,904 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-07 19:29:48,905 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-07 19:29:48,905 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-07 19:29:48,905 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-07 19:29:48,905 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-07 19:29:48,905 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-07 19:29:48,905 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-07 19:29:48,905 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-07 19:29:48,905 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-07 19:29:48,905 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-07 19:29:48,905 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-07 19:29:48,905 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-07 19:29:48,905 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-07 19:29:48,905 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-07 19:29:48,905 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-07 19:29:48,905 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:29:48,905 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-07 19:29:48,906 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-07 19:29:48,906 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-07 19:29:48,906 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-07 19:29:48,906 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-07 19:29:48,906 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-07 19:29:48,906 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-07 19:29:48,906 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-07 19:29:48,906 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 -> c9008ebcceff34245d74f1892a84a552f8268a9318e8a2970f14b3ec6b594daf [2024-11-07 19:29:49,174 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-07 19:29:49,187 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-07 19:29:49,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-07 19:29:49,190 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-07 19:29:49,190 INFO L274 PluginConnector]: CDTParser initialized [2024-11-07 19:29:49,191 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2024-11-07 19:29:50,582 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-07 19:29:50,842 INFO L384 CDTParser]: Found 1 translation units. [2024-11-07 19:29:50,845 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-trans.wvr.c [2024-11-07 19:29:50,853 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/822840201/4116696a39ba462d8d6043da8e602ef4/FLAG2809d572d [2024-11-07 19:29:50,871 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/822840201/4116696a39ba462d8d6043da8e602ef4 [2024-11-07 19:29:50,876 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-07 19:29:50,877 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-07 19:29:50,878 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-07 19:29:50,880 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-07 19:29:50,883 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-07 19:29:50,884 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:29:50" (1/1) ... [2024-11-07 19:29:50,885 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21b2d91e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:50, skipping insertion in model container [2024-11-07 19:29:50,885 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:29:50" (1/1) ... [2024-11-07 19:29:50,905 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-07 19:29:51,097 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 19:29:51,107 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 19:29:51,114 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:29:51,128 INFO L200 MainTranslator]: Completed pre-run [2024-11-07 19:29:51,170 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:29:51,185 INFO L204 MainTranslator]: Completed translation [2024-11-07 19:29:51,186 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:51 WrapperNode [2024-11-07 19:29:51,186 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-07 19:29:51,188 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-07 19:29:51,188 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-07 19:29:51,188 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-07 19:29:51,195 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:51" (1/1) ... [2024-11-07 19:29:51,209 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:51" (1/1) ... [2024-11-07 19:29:51,254 INFO L138 Inliner]: procedures = 26, calls = 52, calls flagged for inlining = 23, calls inlined = 35, statements flattened = 426 [2024-11-07 19:29:51,255 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-07 19:29:51,255 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-07 19:29:51,255 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-07 19:29:51,255 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-07 19:29:51,270 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:51" (1/1) ... [2024-11-07 19:29:51,271 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:51" (1/1) ... [2024-11-07 19:29:51,277 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:51" (1/1) ... [2024-11-07 19:29:51,306 INFO L175 MemorySlicer]: Split 26 memory accesses to 3 slices as follows [2, 9, 15]. 58 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 6 writes are split as follows [0, 3, 3]. [2024-11-07 19:29:51,306 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:51" (1/1) ... [2024-11-07 19:29:51,306 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:51" (1/1) ... [2024-11-07 19:29:51,329 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:51" (1/1) ... [2024-11-07 19:29:51,339 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:51" (1/1) ... [2024-11-07 19:29:51,341 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:51" (1/1) ... [2024-11-07 19:29:51,343 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:51" (1/1) ... [2024-11-07 19:29:51,349 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-07 19:29:51,350 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-07 19:29:51,350 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-07 19:29:51,350 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-07 19:29:51,351 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:51" (1/1) ... [2024-11-07 19:29:51,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:29:51,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:29:51,394 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 19:29:51,398 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 19:29:51,421 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-07 19:29:51,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-07 19:29:51,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-07 19:29:51,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-07 19:29:51,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-07 19:29:51,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-07 19:29:51,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-07 19:29:51,422 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-07 19:29:51,422 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-07 19:29:51,422 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-07 19:29:51,422 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-07 19:29:51,423 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-07 19:29:51,423 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-07 19:29:51,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-07 19:29:51,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-07 19:29:51,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-07 19:29:51,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-07 19:29:51,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-07 19:29:51,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-07 19:29:51,425 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 19:29:51,539 INFO L238 CfgBuilder]: Building ICFG [2024-11-07 19:29:51,541 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-07 19:29:52,298 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-07 19:29:52,299 INFO L287 CfgBuilder]: Performing block encoding [2024-11-07 19:29:52,754 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-07 19:29:52,756 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-07 19:29:52,757 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:29:52 BoogieIcfgContainer [2024-11-07 19:29:52,757 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-07 19:29:52,759 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-07 19:29:52,759 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-07 19:29:52,764 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-07 19:29:52,765 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:29:50" (1/3) ... [2024-11-07 19:29:52,765 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40d7dacb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:29:52, skipping insertion in model container [2024-11-07 19:29:52,765 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:29:51" (2/3) ... [2024-11-07 19:29:52,766 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40d7dacb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:29:52, skipping insertion in model container [2024-11-07 19:29:52,766 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:29:52" (3/3) ... [2024-11-07 19:29:52,767 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-node-trans.wvr.c [2024-11-07 19:29:52,781 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-07 19:29:52,782 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 50 error locations. [2024-11-07 19:29:52,782 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-07 19:29:52,892 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-07 19:29:52,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 120 transitions, 261 flow [2024-11-07 19:29:52,991 INFO L124 PetriNetUnfolderBase]: 12/117 cut-off events. [2024-11-07 19:29:52,994 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-07 19:29:53,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 117 events. 12/117 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 402 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 87. Up to 2 conditions per place. [2024-11-07 19:29:53,001 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 120 transitions, 261 flow [2024-11-07 19:29:53,008 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 114 places, 116 transitions, 250 flow [2024-11-07 19:29:53,019 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 19:29:53,034 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;@2a7c33a6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 19:29:53,034 INFO L334 AbstractCegarLoop]: Starting to check reachability of 89 error locations. [2024-11-07 19:29:53,041 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 19:29:53,041 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-07 19:29:53,042 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 19:29:53,042 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:53,043 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:29:53,043 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-07 19:29:53,047 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:53,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1324850, now seen corresponding path program 1 times [2024-11-07 19:29:53,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:53,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268974782] [2024-11-07 19:29:53,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:53,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:53,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:53,358 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 19:29:53,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:53,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268974782] [2024-11-07 19:29:53,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268974782] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:29:53,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:29:53,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-07 19:29:53,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466431584] [2024-11-07 19:29:53,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:29:53,370 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:29:53,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:53,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:29:53,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:29:53,479 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-07 19:29:53,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 116 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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 19:29:53,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:53,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-07 19:29:53,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:29:54,429 INFO L124 PetriNetUnfolderBase]: 2205/4833 cut-off events. [2024-11-07 19:29:54,429 INFO L125 PetriNetUnfolderBase]: For 149/149 co-relation queries the response was YES. [2024-11-07 19:29:54,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7937 conditions, 4833 events. 2205/4833 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39081 event pairs, 1390 based on Foata normal form. 1/3721 useless extension candidates. Maximal degree in co-relation 7419. Up to 2942 conditions per place. [2024-11-07 19:29:54,484 INFO L140 encePairwiseOnDemand]: 114/120 looper letters, 48 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2024-11-07 19:29:54,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 111 transitions, 340 flow [2024-11-07 19:29:54,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:29:54,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:29:54,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 249 transitions. [2024-11-07 19:29:54,497 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6916666666666667 [2024-11-07 19:29:54,499 INFO L175 Difference]: Start difference. First operand has 114 places, 116 transitions, 250 flow. Second operand 3 states and 249 transitions. [2024-11-07 19:29:54,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 111 transitions, 340 flow [2024-11-07 19:29:54,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 111 transitions, 328 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-07 19:29:54,515 INFO L231 Difference]: Finished difference. Result has 105 places, 111 transitions, 232 flow [2024-11-07 19:29:54,518 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=105, PETRI_TRANSITIONS=111} [2024-11-07 19:29:54,521 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, -9 predicate places. [2024-11-07 19:29:54,521 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 111 transitions, 232 flow [2024-11-07 19:29:54,521 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 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 19:29:54,522 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:54,522 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:29:54,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-07 19:29:54,522 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-07 19:29:54,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:54,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1324851, now seen corresponding path program 1 times [2024-11-07 19:29:54,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:54,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504850552] [2024-11-07 19:29:54,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:54,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:54,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:55,007 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 19:29:55,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:55,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504850552] [2024-11-07 19:29:55,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504850552] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:29:55,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:29:55,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:29:55,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130245137] [2024-11-07 19:29:55,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:29:55,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:29:55,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:55,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:29:55,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:29:55,121 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-07 19:29:55,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 111 transitions, 232 flow. Second operand has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 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 19:29:55,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:55,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-07 19:29:55,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:29:55,777 INFO L124 PetriNetUnfolderBase]: 2205/4835 cut-off events. [2024-11-07 19:29:55,777 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-07 19:29:55,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7844 conditions, 4835 events. 2205/4835 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39072 event pairs, 1390 based on Foata normal form. 0/3720 useless extension candidates. Maximal degree in co-relation 7809. Up to 2954 conditions per place. [2024-11-07 19:29:55,822 INFO L140 encePairwiseOnDemand]: 116/120 looper letters, 53 selfloop transitions, 2 changer transitions 0/113 dead transitions. [2024-11-07 19:29:55,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 113 transitions, 346 flow [2024-11-07 19:29:55,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:29:55,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:29:55,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 252 transitions. [2024-11-07 19:29:55,826 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-11-07 19:29:55,827 INFO L175 Difference]: Start difference. First operand has 105 places, 111 transitions, 232 flow. Second operand 3 states and 252 transitions. [2024-11-07 19:29:55,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 113 transitions, 346 flow [2024-11-07 19:29:55,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 113 transitions, 342 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:29:55,832 INFO L231 Difference]: Finished difference. Result has 106 places, 112 transitions, 242 flow [2024-11-07 19:29:55,832 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=106, PETRI_TRANSITIONS=112} [2024-11-07 19:29:55,834 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, -8 predicate places. [2024-11-07 19:29:55,834 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 112 transitions, 242 flow [2024-11-07 19:29:55,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 65.75) internal successors, (263), 4 states have internal predecessors, (263), 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 19:29:55,834 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:55,834 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-07 19:29:55,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-07 19:29:55,835 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-07 19:29:55,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:55,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1273224688, now seen corresponding path program 1 times [2024-11-07 19:29:55,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:55,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568796544] [2024-11-07 19:29:55,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:55,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:55,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:56,207 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 19:29:56,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:56,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568796544] [2024-11-07 19:29:56,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568796544] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:29:56,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252934100] [2024-11-07 19:29:56,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:56,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:29:56,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:29:56,212 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 19:29:56,214 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 19:29:56,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:56,325 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-07 19:29:56,328 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:29:56,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-07 19:29:56,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:29:56,583 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:29:56,699 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 19:29:56,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252934100] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:29:56,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:29:56,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-07 19:29:56,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125840020] [2024-11-07 19:29:56,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:29:56,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-07 19:29:56,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:56,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-07 19:29:56,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-07 19:29:57,491 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-07 19:29:57,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 112 transitions, 242 flow. Second operand has 11 states, 11 states have (on average 66.36363636363636) internal successors, (730), 11 states have internal predecessors, (730), 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 19:29:57,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:57,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-07 19:29:57,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:29:58,186 INFO L124 PetriNetUnfolderBase]: 2205/4834 cut-off events. [2024-11-07 19:29:58,186 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-07 19:29:58,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7846 conditions, 4834 events. 2205/4834 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39080 event pairs, 1390 based on Foata normal form. 0/3720 useless extension candidates. Maximal degree in co-relation 7833. Up to 2950 conditions per place. [2024-11-07 19:29:58,224 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 49 selfloop transitions, 5 changer transitions 0/112 dead transitions. [2024-11-07 19:29:58,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 112 transitions, 348 flow [2024-11-07 19:29:58,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:29:58,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:29:58,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 380 transitions. [2024-11-07 19:29:58,227 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-11-07 19:29:58,227 INFO L175 Difference]: Start difference. First operand has 106 places, 112 transitions, 242 flow. Second operand 5 states and 380 transitions. [2024-11-07 19:29:58,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 112 transitions, 348 flow [2024-11-07 19:29:58,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 112 transitions, 346 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:29:58,230 INFO L231 Difference]: Finished difference. Result has 109 places, 112 transitions, 254 flow [2024-11-07 19:29:58,230 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=254, PETRI_PLACES=109, PETRI_TRANSITIONS=112} [2024-11-07 19:29:58,231 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, -5 predicate places. [2024-11-07 19:29:58,231 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 112 transitions, 254 flow [2024-11-07 19:29:58,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 66.36363636363636) internal successors, (730), 11 states have internal predecessors, (730), 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 19:29:58,232 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:58,232 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-07 19:29:58,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-07 19:29:58,436 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:29:58,437 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-07 19:29:58,437 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:58,437 INFO L85 PathProgramCache]: Analyzing trace with hash 815261611, now seen corresponding path program 1 times [2024-11-07 19:29:58,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:58,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346249903] [2024-11-07 19:29:58,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:58,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:58,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:58,685 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 19:29:58,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:58,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346249903] [2024-11-07 19:29:58,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346249903] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:29:58,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:29:58,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:29:58,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85199387] [2024-11-07 19:29:58,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:29:58,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:29:58,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:58,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:29:58,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:29:58,814 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-07 19:29:58,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 112 transitions, 254 flow. Second operand has 5 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 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 19:29:58,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:58,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-07 19:29:58,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:29:59,354 INFO L124 PetriNetUnfolderBase]: 2206/4837 cut-off events. [2024-11-07 19:29:59,354 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-11-07 19:29:59,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7860 conditions, 4837 events. 2206/4837 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39112 event pairs, 1390 based on Foata normal form. 0/3722 useless extension candidates. Maximal degree in co-relation 7831. Up to 2953 conditions per place. [2024-11-07 19:29:59,389 INFO L140 encePairwiseOnDemand]: 114/120 looper letters, 52 selfloop transitions, 5 changer transitions 0/115 dead transitions. [2024-11-07 19:29:59,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 115 transitions, 374 flow [2024-11-07 19:29:59,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:29:59,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:29:59,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 318 transitions. [2024-11-07 19:29:59,391 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6625 [2024-11-07 19:29:59,391 INFO L175 Difference]: Start difference. First operand has 109 places, 112 transitions, 254 flow. Second operand 4 states and 318 transitions. [2024-11-07 19:29:59,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 115 transitions, 374 flow [2024-11-07 19:29:59,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 115 transitions, 364 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-07 19:29:59,397 INFO L231 Difference]: Finished difference. Result has 110 places, 114 transitions, 269 flow [2024-11-07 19:29:59,397 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=269, PETRI_PLACES=110, PETRI_TRANSITIONS=114} [2024-11-07 19:29:59,398 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, -4 predicate places. [2024-11-07 19:29:59,398 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 114 transitions, 269 flow [2024-11-07 19:29:59,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.2) internal successors, (331), 5 states have internal predecessors, (331), 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 19:29:59,399 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:59,399 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:29:59,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-07 19:29:59,399 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-07 19:29:59,400 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:59,400 INFO L85 PathProgramCache]: Analyzing trace with hash -496692954, now seen corresponding path program 1 times [2024-11-07 19:29:59,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:59,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006658585] [2024-11-07 19:29:59,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:59,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:59,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:59,485 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 19:29:59,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:59,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006658585] [2024-11-07 19:29:59,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006658585] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:29:59,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:29:59,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:29:59,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967229721] [2024-11-07 19:29:59,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:29:59,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:29:59,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:59,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:29:59,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:29:59,517 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-11-07 19:29:59,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 114 transitions, 269 flow. Second operand has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 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 19:29:59,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:59,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-11-07 19:29:59,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:00,065 INFO L124 PetriNetUnfolderBase]: 2205/4836 cut-off events. [2024-11-07 19:30:00,066 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-11-07 19:30:00,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7860 conditions, 4836 events. 2205/4836 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39097 event pairs, 1390 based on Foata normal form. 1/3726 useless extension candidates. Maximal degree in co-relation 7832. Up to 2950 conditions per place. [2024-11-07 19:30:00,103 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 50 selfloop transitions, 4 changer transitions 0/114 dead transitions. [2024-11-07 19:30:00,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 114 transitions, 374 flow [2024-11-07 19:30:00,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:30:00,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:30:00,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 327 transitions. [2024-11-07 19:30:00,106 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.68125 [2024-11-07 19:30:00,106 INFO L175 Difference]: Start difference. First operand has 110 places, 114 transitions, 269 flow. Second operand 4 states and 327 transitions. [2024-11-07 19:30:00,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 114 transitions, 374 flow [2024-11-07 19:30:00,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 114 transitions, 370 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:30:00,108 INFO L231 Difference]: Finished difference. Result has 111 places, 113 transitions, 268 flow [2024-11-07 19:30:00,108 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=268, PETRI_PLACES=111, PETRI_TRANSITIONS=113} [2024-11-07 19:30:00,109 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, -3 predicate places. [2024-11-07 19:30:00,109 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 113 transitions, 268 flow [2024-11-07 19:30:00,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.5) internal successors, (278), 4 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:00,109 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:00,114 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:00,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-07 19:30:00,115 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-07 19:30:00,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:00,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1782402732, now seen corresponding path program 1 times [2024-11-07 19:30:00,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:00,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485408793] [2024-11-07 19:30:00,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:00,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:00,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:00,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:30:00,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:00,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485408793] [2024-11-07 19:30:00,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485408793] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:00,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103180035] [2024-11-07 19:30:00,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:00,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:00,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:00,379 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:30:00,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-07 19:30:00,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:00,485 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-07 19:30:00,487 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:00,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-07 19:30:00,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:30:00,666 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:30:00,845 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:30:00,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103180035] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:30:00,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:30:00,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-07 19:30:00,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381002551] [2024-11-07 19:30:00,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:30:00,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-07 19:30:00,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:00,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-07 19:30:00,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-07 19:30:01,722 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-07 19:30:01,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 113 transitions, 268 flow. Second operand has 13 states, 13 states have (on average 66.61538461538461) internal successors, (866), 13 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:01,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:01,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-07 19:30:01,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:02,471 INFO L124 PetriNetUnfolderBase]: 2207/4841 cut-off events. [2024-11-07 19:30:02,471 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-07 19:30:02,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7881 conditions, 4841 events. 2207/4841 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39141 event pairs, 1390 based on Foata normal form. 0/3729 useless extension candidates. Maximal degree in co-relation 7839. Up to 2946 conditions per place. [2024-11-07 19:30:02,509 INFO L140 encePairwiseOnDemand]: 112/120 looper letters, 45 selfloop transitions, 16 changer transitions 0/119 dead transitions. [2024-11-07 19:30:02,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 119 transitions, 416 flow [2024-11-07 19:30:02,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:30:02,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:30:02,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 648 transitions. [2024-11-07 19:30:02,514 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-07 19:30:02,514 INFO L175 Difference]: Start difference. First operand has 111 places, 113 transitions, 268 flow. Second operand 9 states and 648 transitions. [2024-11-07 19:30:02,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 119 transitions, 416 flow [2024-11-07 19:30:02,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 119 transitions, 406 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:30:02,517 INFO L231 Difference]: Finished difference. Result has 115 places, 119 transitions, 316 flow [2024-11-07 19:30:02,517 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=316, PETRI_PLACES=115, PETRI_TRANSITIONS=119} [2024-11-07 19:30:02,517 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 1 predicate places. [2024-11-07 19:30:02,518 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 119 transitions, 316 flow [2024-11-07 19:30:02,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 66.61538461538461) internal successors, (866), 13 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:02,518 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:02,519 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:02,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-07 19:30:02,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:02,719 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-07 19:30:02,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:02,720 INFO L85 PathProgramCache]: Analyzing trace with hash -580089275, now seen corresponding path program 1 times [2024-11-07 19:30:02,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:02,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332539687] [2024-11-07 19:30:02,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:02,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:30:02,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:02,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332539687] [2024-11-07 19:30:02,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332539687] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:02,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:30:02,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:30:02,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232270913] [2024-11-07 19:30:02,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:02,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:30:02,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:02,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:30:02,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:30:03,138 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-07 19:30:03,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 119 transitions, 316 flow. Second operand has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:03,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:03,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-07 19:30:03,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:03,652 INFO L124 PetriNetUnfolderBase]: 2207/4843 cut-off events. [2024-11-07 19:30:03,653 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-11-07 19:30:03,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7896 conditions, 4843 events. 2207/4843 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 39096 event pairs, 1390 based on Foata normal form. 0/3731 useless extension candidates. Maximal degree in co-relation 7850. Up to 2958 conditions per place. [2024-11-07 19:30:03,680 INFO L140 encePairwiseOnDemand]: 114/120 looper letters, 58 selfloop transitions, 5 changer transitions 0/121 dead transitions. [2024-11-07 19:30:03,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 121 transitions, 446 flow [2024-11-07 19:30:03,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:30:03,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:30:03,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 317 transitions. [2024-11-07 19:30:03,684 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6604166666666667 [2024-11-07 19:30:03,685 INFO L175 Difference]: Start difference. First operand has 115 places, 119 transitions, 316 flow. Second operand 4 states and 317 transitions. [2024-11-07 19:30:03,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 121 transitions, 446 flow [2024-11-07 19:30:03,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 121 transitions, 427 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-07 19:30:03,689 INFO L231 Difference]: Finished difference. Result has 116 places, 120 transitions, 320 flow [2024-11-07 19:30:03,689 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=320, PETRI_PLACES=116, PETRI_TRANSITIONS=120} [2024-11-07 19:30:03,690 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 2 predicate places. [2024-11-07 19:30:03,691 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 120 transitions, 320 flow [2024-11-07 19:30:03,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 66.8) internal successors, (334), 5 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:03,692 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:03,692 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:03,692 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-07 19:30:03,692 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-07 19:30:03,693 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:03,693 INFO L85 PathProgramCache]: Analyzing trace with hash 879998184, now seen corresponding path program 1 times [2024-11-07 19:30:03,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:03,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416181931] [2024-11-07 19:30:03,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:03,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:03,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:03,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:30:03,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:03,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416181931] [2024-11-07 19:30:03,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416181931] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:03,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610143621] [2024-11-07 19:30:03,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:03,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:03,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:04,000 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:30:04,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-07 19:30:04,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:04,150 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-07 19:30:04,152 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:04,178 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 19:30:04,280 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:30:04,280 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:30:04,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:30:04,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610143621] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:30:04,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:30:04,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-07 19:30:04,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045264236] [2024-11-07 19:30:04,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:30:04,411 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-07 19:30:04,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:04,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-07 19:30:04,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-07 19:30:05,161 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-07 19:30:05,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 120 transitions, 320 flow. Second operand has 13 states, 13 states have (on average 67.07692307692308) internal successors, (872), 13 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:05,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:05,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-07 19:30:05,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:05,782 INFO L124 PetriNetUnfolderBase]: 2208/4845 cut-off events. [2024-11-07 19:30:05,782 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-07 19:30:05,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7902 conditions, 4845 events. 2208/4845 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39091 event pairs, 1390 based on Foata normal form. 0/3733 useless extension candidates. Maximal degree in co-relation 7857. Up to 2950 conditions per place. [2024-11-07 19:30:05,821 INFO L140 encePairwiseOnDemand]: 111/120 looper letters, 47 selfloop transitions, 18 changer transitions 0/123 dead transitions. [2024-11-07 19:30:05,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 123 transitions, 458 flow [2024-11-07 19:30:05,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:30:05,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:30:05,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 647 transitions. [2024-11-07 19:30:05,824 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5990740740740741 [2024-11-07 19:30:05,824 INFO L175 Difference]: Start difference. First operand has 116 places, 120 transitions, 320 flow. Second operand 9 states and 647 transitions. [2024-11-07 19:30:05,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 123 transitions, 458 flow [2024-11-07 19:30:05,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 123 transitions, 453 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:30:05,828 INFO L231 Difference]: Finished difference. Result has 121 places, 123 transitions, 359 flow [2024-11-07 19:30:05,830 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=359, PETRI_PLACES=121, PETRI_TRANSITIONS=123} [2024-11-07 19:30:05,831 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 7 predicate places. [2024-11-07 19:30:05,831 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 123 transitions, 359 flow [2024-11-07 19:30:05,831 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 67.07692307692308) internal successors, (872), 13 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:05,833 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:05,833 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:05,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-07 19:30:06,034 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:06,034 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-07 19:30:06,035 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:06,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1510143368, now seen corresponding path program 1 times [2024-11-07 19:30:06,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:06,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482552449] [2024-11-07 19:30:06,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:06,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:06,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:06,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:30:06,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:06,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482552449] [2024-11-07 19:30:06,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482552449] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:06,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265842933] [2024-11-07 19:30:06,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:06,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:06,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:06,300 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:30:06,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-07 19:30:06,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:06,397 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-07 19:30:06,398 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:06,468 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 19:30:06,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-07 19:30:06,475 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-07 19:30:06,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265842933] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:06,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-07 19:30:06,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2024-11-07 19:30:06,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382120897] [2024-11-07 19:30:06,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:06,475 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:30:06,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:06,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:30:06,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-07 19:30:06,532 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-07 19:30:06,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 123 transitions, 359 flow. Second operand has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:06,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:06,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-07 19:30:06,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:07,007 INFO L124 PetriNetUnfolderBase]: 2209/4849 cut-off events. [2024-11-07 19:30:07,007 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-07 19:30:07,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7928 conditions, 4849 events. 2209/4849 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39132 event pairs, 1390 based on Foata normal form. 0/3736 useless extension candidates. Maximal degree in co-relation 7876. Up to 2968 conditions per place. [2024-11-07 19:30:07,038 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 66 selfloop transitions, 5 changer transitions 0/126 dead transitions. [2024-11-07 19:30:07,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 126 transitions, 507 flow [2024-11-07 19:30:07,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:30:07,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:30:07,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 317 transitions. [2024-11-07 19:30:07,040 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6604166666666667 [2024-11-07 19:30:07,041 INFO L175 Difference]: Start difference. First operand has 121 places, 123 transitions, 359 flow. Second operand 4 states and 317 transitions. [2024-11-07 19:30:07,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 126 transitions, 507 flow [2024-11-07 19:30:07,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 126 transitions, 482 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-07 19:30:07,046 INFO L231 Difference]: Finished difference. Result has 121 places, 125 transitions, 358 flow [2024-11-07 19:30:07,046 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=334, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=358, PETRI_PLACES=121, PETRI_TRANSITIONS=125} [2024-11-07 19:30:07,048 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 7 predicate places. [2024-11-07 19:30:07,048 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 125 transitions, 358 flow [2024-11-07 19:30:07,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.0) internal successors, (272), 4 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:07,049 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:07,049 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:07,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-07 19:30:07,250 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-07 19:30:07,250 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-07 19:30:07,250 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:07,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1510143367, now seen corresponding path program 1 times [2024-11-07 19:30:07,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:07,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804471164] [2024-11-07 19:30:07,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:07,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:07,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:07,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-07 19:30:07,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:07,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804471164] [2024-11-07 19:30:07,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804471164] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:07,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:30:07,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:30:07,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248692052] [2024-11-07 19:30:07,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:07,320 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:30:07,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:07,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:30:07,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:30:07,367 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-07 19:30:07,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 125 transitions, 358 flow. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:07,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:07,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-07 19:30:07,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:07,765 INFO L124 PetriNetUnfolderBase]: 2209/4845 cut-off events. [2024-11-07 19:30:07,765 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-07 19:30:07,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7918 conditions, 4845 events. 2209/4845 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 39175 event pairs, 1390 based on Foata normal form. 2/3737 useless extension candidates. Maximal degree in co-relation 7869. Up to 2956 conditions per place. [2024-11-07 19:30:07,794 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 64 selfloop transitions, 3 changer transitions 0/122 dead transitions. [2024-11-07 19:30:07,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 122 transitions, 486 flow [2024-11-07 19:30:07,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:30:07,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:30:07,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 248 transitions. [2024-11-07 19:30:07,796 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6888888888888889 [2024-11-07 19:30:07,796 INFO L175 Difference]: Start difference. First operand has 121 places, 125 transitions, 358 flow. Second operand 3 states and 248 transitions. [2024-11-07 19:30:07,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 122 transitions, 486 flow [2024-11-07 19:30:07,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 122 transitions, 480 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:30:07,798 INFO L231 Difference]: Finished difference. Result has 118 places, 122 transitions, 352 flow [2024-11-07 19:30:07,799 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=352, PETRI_PLACES=118, PETRI_TRANSITIONS=122} [2024-11-07 19:30:07,800 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 4 predicate places. [2024-11-07 19:30:07,800 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 122 transitions, 352 flow [2024-11-07 19:30:07,800 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:07,800 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:07,801 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:07,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-07 19:30:07,801 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-07 19:30:07,801 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:07,801 INFO L85 PathProgramCache]: Analyzing trace with hash -430193655, now seen corresponding path program 1 times [2024-11-07 19:30:07,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:07,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886991703] [2024-11-07 19:30:07,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:07,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:07,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:07,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-07 19:30:07,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:07,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886991703] [2024-11-07 19:30:07,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886991703] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:07,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:30:07,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:30:07,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014461536] [2024-11-07 19:30:07,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:07,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:30:07,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:07,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:30:07,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:30:07,934 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-11-07 19:30:07,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 122 transitions, 352 flow. Second operand has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:07,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:07,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-11-07 19:30:07,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:08,353 INFO L124 PetriNetUnfolderBase]: 2208/4844 cut-off events. [2024-11-07 19:30:08,353 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-11-07 19:30:08,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7915 conditions, 4844 events. 2208/4844 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 39174 event pairs, 1390 based on Foata normal form. 1/3736 useless extension candidates. Maximal degree in co-relation 7867. Up to 2964 conditions per place. [2024-11-07 19:30:08,372 INFO L140 encePairwiseOnDemand]: 116/120 looper letters, 63 selfloop transitions, 4 changer transitions 0/122 dead transitions. [2024-11-07 19:30:08,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 122 transitions, 484 flow [2024-11-07 19:30:08,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:30:08,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:30:08,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 325 transitions. [2024-11-07 19:30:08,373 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2024-11-07 19:30:08,373 INFO L175 Difference]: Start difference. First operand has 118 places, 122 transitions, 352 flow. Second operand 4 states and 325 transitions. [2024-11-07 19:30:08,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 122 transitions, 484 flow [2024-11-07 19:30:08,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 122 transitions, 478 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:30:08,375 INFO L231 Difference]: Finished difference. Result has 119 places, 121 transitions, 350 flow [2024-11-07 19:30:08,376 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=350, PETRI_PLACES=119, PETRI_TRANSITIONS=121} [2024-11-07 19:30:08,376 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 5 predicate places. [2024-11-07 19:30:08,376 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 121 transitions, 350 flow [2024-11-07 19:30:08,376 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.0) internal successors, (284), 4 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:08,376 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:08,376 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:08,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-07 19:30:08,376 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-07 19:30:08,377 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:08,377 INFO L85 PathProgramCache]: Analyzing trace with hash -451124234, now seen corresponding path program 1 times [2024-11-07 19:30:08,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:08,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334051533] [2024-11-07 19:30:08,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:08,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:08,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:08,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:30:08,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:08,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334051533] [2024-11-07 19:30:08,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334051533] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:08,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945981774] [2024-11-07 19:30:08,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:08,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:08,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:08,531 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 19:30:08,533 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 19:30:08,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:08,639 INFO L255 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-07 19:30:08,640 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:08,720 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:30:08,721 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:30:08,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:30:08,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945981774] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:30:08,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:30:08,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-07 19:30:08,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010048770] [2024-11-07 19:30:08,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:30:08,788 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-07 19:30:08,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:08,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-07 19:30:08,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-07 19:30:08,983 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-11-07 19:30:08,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 121 transitions, 350 flow. Second operand has 14 states, 14 states have (on average 70.0) internal successors, (980), 14 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:08,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:08,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-11-07 19:30:08,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:09,791 INFO L124 PetriNetUnfolderBase]: 4402/9628 cut-off events. [2024-11-07 19:30:09,791 INFO L125 PetriNetUnfolderBase]: For 70/70 co-relation queries the response was YES. [2024-11-07 19:30:09,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15715 conditions, 9628 events. 4402/9628 cut-off events. For 70/70 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 87455 event pairs, 2784 based on Foata normal form. 1/7507 useless extension candidates. Maximal degree in co-relation 7860. Up to 2944 conditions per place. [2024-11-07 19:30:09,835 INFO L140 encePairwiseOnDemand]: 107/120 looper letters, 88 selfloop transitions, 34 changer transitions 0/177 dead transitions. [2024-11-07 19:30:09,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 177 transitions, 758 flow [2024-11-07 19:30:09,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:30:09,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:30:09,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 716 transitions. [2024-11-07 19:30:09,838 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.662962962962963 [2024-11-07 19:30:09,838 INFO L175 Difference]: Start difference. First operand has 119 places, 121 transitions, 350 flow. Second operand 9 states and 716 transitions. [2024-11-07 19:30:09,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 177 transitions, 758 flow [2024-11-07 19:30:09,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 177 transitions, 744 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:30:09,842 INFO L231 Difference]: Finished difference. Result has 128 places, 139 transitions, 540 flow [2024-11-07 19:30:09,842 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=540, PETRI_PLACES=128, PETRI_TRANSITIONS=139} [2024-11-07 19:30:09,844 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 14 predicate places. [2024-11-07 19:30:09,844 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 139 transitions, 540 flow [2024-11-07 19:30:09,844 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.0) internal successors, (980), 14 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:09,844 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:09,845 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:09,860 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 19:30:10,045 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-07 19:30:10,045 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-07 19:30:10,046 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:10,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1099947173, now seen corresponding path program 1 times [2024-11-07 19:30:10,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:10,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689059491] [2024-11-07 19:30:10,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:10,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:10,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:10,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-07 19:30:10,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:10,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689059491] [2024-11-07 19:30:10,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689059491] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:10,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903166061] [2024-11-07 19:30:10,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:10,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:10,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:10,341 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 19:30:10,343 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 19:30:10,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:10,461 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-07 19:30:10,463 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:10,524 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 19:30:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:30:10,541 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-07 19:30:10,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903166061] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:10,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-07 19:30:10,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2024-11-07 19:30:10,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982926701] [2024-11-07 19:30:10,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:10,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:30:10,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:10,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:30:10,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-11-07 19:30:10,595 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-07 19:30:10,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 139 transitions, 540 flow. Second operand has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:10,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:10,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-07 19:30:10,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:11,238 INFO L124 PetriNetUnfolderBase]: 4414/9682 cut-off events. [2024-11-07 19:30:11,238 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2024-11-07 19:30:11,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15852 conditions, 9682 events. 4414/9682 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 87989 event pairs, 2780 based on Foata normal form. 0/7461 useless extension candidates. Maximal degree in co-relation 7899. Up to 5930 conditions per place. [2024-11-07 19:30:11,296 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 85 selfloop transitions, 5 changer transitions 0/142 dead transitions. [2024-11-07 19:30:11,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 142 transitions, 726 flow [2024-11-07 19:30:11,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:30:11,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:30:11,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 317 transitions. [2024-11-07 19:30:11,297 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6604166666666667 [2024-11-07 19:30:11,297 INFO L175 Difference]: Start difference. First operand has 128 places, 139 transitions, 540 flow. Second operand 4 states and 317 transitions. [2024-11-07 19:30:11,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 142 transitions, 726 flow [2024-11-07 19:30:11,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 142 transitions, 722 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-07 19:30:11,301 INFO L231 Difference]: Finished difference. Result has 131 places, 141 transitions, 560 flow [2024-11-07 19:30:11,301 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=536, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=560, PETRI_PLACES=131, PETRI_TRANSITIONS=141} [2024-11-07 19:30:11,302 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 17 predicate places. [2024-11-07 19:30:11,302 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 141 transitions, 560 flow [2024-11-07 19:30:11,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.75) internal successors, (275), 4 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:11,302 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:11,302 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:11,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-07 19:30:11,502 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-07 19:30:11,503 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-07 19:30:11,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:11,503 INFO L85 PathProgramCache]: Analyzing trace with hash 261377450, now seen corresponding path program 1 times [2024-11-07 19:30:11,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:11,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997602764] [2024-11-07 19:30:11,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:11,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:11,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:11,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:30:11,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:11,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997602764] [2024-11-07 19:30:11,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997602764] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:11,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:30:11,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:30:11,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244278569] [2024-11-07 19:30:11,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:11,599 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:30:11,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:11,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:30:11,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:30:11,626 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-11-07 19:30:11,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 141 transitions, 560 flow. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:11,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:11,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-11-07 19:30:11,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:12,401 INFO L124 PetriNetUnfolderBase]: 4412/9680 cut-off events. [2024-11-07 19:30:12,401 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2024-11-07 19:30:12,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15856 conditions, 9680 events. 4412/9680 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 87907 event pairs, 2780 based on Foata normal form. 2/7470 useless extension candidates. Maximal degree in co-relation 7900. Up to 5923 conditions per place. [2024-11-07 19:30:12,444 INFO L140 encePairwiseOnDemand]: 116/120 looper letters, 82 selfloop transitions, 4 changer transitions 0/141 dead transitions. [2024-11-07 19:30:12,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 141 transitions, 729 flow [2024-11-07 19:30:12,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:30:12,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:30:12,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 325 transitions. [2024-11-07 19:30:12,446 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6770833333333334 [2024-11-07 19:30:12,446 INFO L175 Difference]: Start difference. First operand has 131 places, 141 transitions, 560 flow. Second operand 4 states and 325 transitions. [2024-11-07 19:30:12,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 141 transitions, 729 flow [2024-11-07 19:30:12,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 141 transitions, 724 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:30:12,449 INFO L231 Difference]: Finished difference. Result has 132 places, 140 transitions, 558 flow [2024-11-07 19:30:12,449 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=558, PETRI_PLACES=132, PETRI_TRANSITIONS=140} [2024-11-07 19:30:12,449 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 18 predicate places. [2024-11-07 19:30:12,449 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 140 transitions, 558 flow [2024-11-07 19:30:12,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 4 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:12,450 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:12,450 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:12,450 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-07 19:30:12,450 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-07 19:30:12,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:12,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1364202777, now seen corresponding path program 2 times [2024-11-07 19:30:12,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:12,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862055135] [2024-11-07 19:30:12,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:12,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:12,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:30:12,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:12,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862055135] [2024-11-07 19:30:12,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862055135] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:12,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735666161] [2024-11-07 19:30:12,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:30:12,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:12,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:12,729 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:30:12,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-07 19:30:12,847 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:30:12,847 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:30:12,849 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-07 19:30:12,851 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:12,881 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 7 [2024-11-07 19:30:12,985 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-07 19:30:12,985 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:30:13,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-07 19:30:13,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735666161] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:30:13,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:30:13,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 16 [2024-11-07 19:30:13,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128545483] [2024-11-07 19:30:13,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:30:13,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-07 19:30:13,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:13,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-07 19:30:13,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-11-07 19:30:14,440 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-07 19:30:14,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 140 transitions, 558 flow. Second operand has 18 states, 18 states have (on average 67.44444444444444) internal successors, (1214), 18 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:14,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:14,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-07 19:30:14,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:16,049 INFO L124 PetriNetUnfolderBase]: 6608/14471 cut-off events. [2024-11-07 19:30:16,049 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2024-11-07 19:30:16,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23721 conditions, 14471 events. 6608/14471 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 139314 event pairs, 4174 based on Foata normal form. 1/11245 useless extension candidates. Maximal degree in co-relation 7901. Up to 5917 conditions per place. [2024-11-07 19:30:16,133 INFO L140 encePairwiseOnDemand]: 107/120 looper letters, 117 selfloop transitions, 36 changer transitions 0/205 dead transitions. [2024-11-07 19:30:16,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 205 transitions, 1135 flow [2024-11-07 19:30:16,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-07 19:30:16,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-07 19:30:16,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1221 transitions. [2024-11-07 19:30:16,136 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5985294117647059 [2024-11-07 19:30:16,136 INFO L175 Difference]: Start difference. First operand has 132 places, 140 transitions, 558 flow. Second operand 17 states and 1221 transitions. [2024-11-07 19:30:16,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 205 transitions, 1135 flow [2024-11-07 19:30:16,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 205 transitions, 1123 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:30:16,141 INFO L231 Difference]: Finished difference. Result has 147 places, 162 transitions, 831 flow [2024-11-07 19:30:16,141 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=831, PETRI_PLACES=147, PETRI_TRANSITIONS=162} [2024-11-07 19:30:16,141 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 33 predicate places. [2024-11-07 19:30:16,142 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 162 transitions, 831 flow [2024-11-07 19:30:16,142 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 67.44444444444444) internal successors, (1214), 18 states have internal predecessors, (1214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:16,142 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:16,142 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:16,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-07 19:30:16,343 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:16,343 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-07 19:30:16,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:16,344 INFO L85 PathProgramCache]: Analyzing trace with hash -487233991, now seen corresponding path program 1 times [2024-11-07 19:30:16,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:16,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891799325] [2024-11-07 19:30:16,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:16,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:16,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:16,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-07 19:30:16,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:16,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891799325] [2024-11-07 19:30:16,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891799325] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:16,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571937093] [2024-11-07 19:30:16,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:16,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:16,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:16,480 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:30:16,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-07 19:30:16,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:16,609 INFO L255 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-07 19:30:16,610 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:16,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-07 19:30:16,685 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:30:16,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-07 19:30:16,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571937093] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:30:16,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:30:16,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-07 19:30:16,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284428380] [2024-11-07 19:30:16,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:30:16,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-07 19:30:16,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:16,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-07 19:30:16,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-11-07 19:30:16,953 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-11-07 19:30:16,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 162 transitions, 831 flow. Second operand has 14 states, 14 states have (on average 70.21428571428571) internal successors, (983), 14 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:16,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:16,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-11-07 19:30:16,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:18,650 INFO L124 PetriNetUnfolderBase]: 13193/28849 cut-off events. [2024-11-07 19:30:18,650 INFO L125 PetriNetUnfolderBase]: For 245/245 co-relation queries the response was YES. [2024-11-07 19:30:18,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47256 conditions, 28849 events. 13193/28849 cut-off events. For 245/245 co-relation queries the response was YES. Maximal size of possible extension queue 1485. Compared 309078 event pairs, 8352 based on Foata normal form. 3/22508 useless extension candidates. Maximal degree in co-relation 15777. Up to 8831 conditions per place. [2024-11-07 19:30:18,978 INFO L140 encePairwiseOnDemand]: 107/120 looper letters, 120 selfloop transitions, 62 changer transitions 0/236 dead transitions. [2024-11-07 19:30:18,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 236 transitions, 1598 flow [2024-11-07 19:30:18,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:30:18,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:30:18,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 713 transitions. [2024-11-07 19:30:18,981 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6601851851851852 [2024-11-07 19:30:18,981 INFO L175 Difference]: Start difference. First operand has 147 places, 162 transitions, 831 flow. Second operand 9 states and 713 transitions. [2024-11-07 19:30:18,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 236 transitions, 1598 flow [2024-11-07 19:30:18,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 236 transitions, 1516 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-11-07 19:30:18,987 INFO L231 Difference]: Finished difference. Result has 154 places, 185 transitions, 1184 flow [2024-11-07 19:30:18,987 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1184, PETRI_PLACES=154, PETRI_TRANSITIONS=185} [2024-11-07 19:30:18,988 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 40 predicate places. [2024-11-07 19:30:18,988 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 185 transitions, 1184 flow [2024-11-07 19:30:18,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.21428571428571) internal successors, (983), 14 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:18,989 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:18,989 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 19:30:19,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-07 19:30:19,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-07 19:30:19,189 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-07 19:30:19,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:19,190 INFO L85 PathProgramCache]: Analyzing trace with hash 2075616908, now seen corresponding path program 1 times [2024-11-07 19:30:19,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:19,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688017111] [2024-11-07 19:30:19,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:19,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-07 19:30:19,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:19,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688017111] [2024-11-07 19:30:19,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688017111] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:19,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:30:19,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:30:19,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991245818] [2024-11-07 19:30:19,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:19,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:30:19,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:19,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:30:19,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:30:19,443 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-07 19:30:19,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 185 transitions, 1184 flow. Second operand has 5 states, 5 states have (on average 68.6) internal successors, (343), 5 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:19,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:19,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-07 19:30:19,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:21,570 INFO L124 PetriNetUnfolderBase]: 13223/29005 cut-off events. [2024-11-07 19:30:21,571 INFO L125 PetriNetUnfolderBase]: For 259/259 co-relation queries the response was YES. [2024-11-07 19:30:21,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47555 conditions, 29005 events. 13223/29005 cut-off events. For 259/259 co-relation queries the response was YES. Maximal size of possible extension queue 1485. Compared 311462 event pairs, 8340 based on Foata normal form. 0/22365 useless extension candidates. Maximal degree in co-relation 16234. Up to 17749 conditions per place. [2024-11-07 19:30:22,057 INFO L140 encePairwiseOnDemand]: 115/120 looper letters, 131 selfloop transitions, 4 changer transitions 0/187 dead transitions. [2024-11-07 19:30:22,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 187 transitions, 1458 flow [2024-11-07 19:30:22,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:30:22,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:30:22,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 316 transitions. [2024-11-07 19:30:22,059 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6583333333333333 [2024-11-07 19:30:22,059 INFO L175 Difference]: Start difference. First operand has 154 places, 185 transitions, 1184 flow. Second operand 4 states and 316 transitions. [2024-11-07 19:30:22,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 187 transitions, 1458 flow [2024-11-07 19:30:22,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 187 transitions, 1456 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-11-07 19:30:22,066 INFO L231 Difference]: Finished difference. Result has 158 places, 186 transitions, 1201 flow [2024-11-07 19:30:22,066 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1182, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1201, PETRI_PLACES=158, PETRI_TRANSITIONS=186} [2024-11-07 19:30:22,066 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 44 predicate places. [2024-11-07 19:30:22,066 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 186 transitions, 1201 flow [2024-11-07 19:30:22,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 68.6) internal successors, (343), 5 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:22,067 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:22,067 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:22,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-07 19:30:22,067 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-07 19:30:22,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:22,068 INFO L85 PathProgramCache]: Analyzing trace with hash 560678040, now seen corresponding path program 2 times [2024-11-07 19:30:22,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:22,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185310227] [2024-11-07 19:30:22,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:22,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:22,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:22,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-07 19:30:22,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:22,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185310227] [2024-11-07 19:30:22,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185310227] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:22,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023361443] [2024-11-07 19:30:22,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:30:22,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:22,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:22,329 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:30:22,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-07 19:30:22,450 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:30:22,450 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:30:22,452 INFO L255 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-07 19:30:22,454 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:22,486 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 7 [2024-11-07 19:30:22,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-07 19:30:22,588 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:30:22,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-07 19:30:22,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023361443] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:30:22,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:30:22,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 4, 4] total 17 [2024-11-07 19:30:22,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117645344] [2024-11-07 19:30:22,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:30:22,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-07 19:30:22,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:22,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-07 19:30:22,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-11-07 19:30:23,676 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-07 19:30:23,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 186 transitions, 1201 flow. Second operand has 18 states, 18 states have (on average 67.94444444444444) internal successors, (1223), 18 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:23,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:23,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-07 19:30:23,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:27,497 INFO L124 PetriNetUnfolderBase]: 19804/43356 cut-off events. [2024-11-07 19:30:27,498 INFO L125 PetriNetUnfolderBase]: For 420/420 co-relation queries the response was YES. [2024-11-07 19:30:27,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71134 conditions, 43356 events. 19804/43356 cut-off events. For 420/420 co-relation queries the response was YES. Maximal size of possible extension queue 2084. Compared 488225 event pairs, 12522 based on Foata normal form. 3/33701 useless extension candidates. Maximal degree in co-relation 24246. Up to 17722 conditions per place. [2024-11-07 19:30:27,850 INFO L140 encePairwiseOnDemand]: 107/120 looper letters, 157 selfloop transitions, 64 changer transitions 0/273 dead transitions. [2024-11-07 19:30:27,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 273 transitions, 2189 flow [2024-11-07 19:30:27,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-07 19:30:27,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-07 19:30:27,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1216 transitions. [2024-11-07 19:30:27,854 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.596078431372549 [2024-11-07 19:30:27,854 INFO L175 Difference]: Start difference. First operand has 158 places, 186 transitions, 1201 flow. Second operand 17 states and 1216 transitions. [2024-11-07 19:30:27,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 273 transitions, 2189 flow [2024-11-07 19:30:27,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 273 transitions, 2182 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:30:27,865 INFO L231 Difference]: Finished difference. Result has 174 places, 224 transitions, 1812 flow [2024-11-07 19:30:27,865 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1192, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1812, PETRI_PLACES=174, PETRI_TRANSITIONS=224} [2024-11-07 19:30:27,865 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 60 predicate places. [2024-11-07 19:30:27,866 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 224 transitions, 1812 flow [2024-11-07 19:30:27,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 67.94444444444444) internal successors, (1223), 18 states have internal predecessors, (1223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:27,866 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:27,866 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:27,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-07 19:30:28,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-07 19:30:28,067 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-07 19:30:28,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:28,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1803065764, now seen corresponding path program 1 times [2024-11-07 19:30:28,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:28,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981821531] [2024-11-07 19:30:28,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:28,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:28,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:30:28,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:28,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981821531] [2024-11-07 19:30:28,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981821531] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:28,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416407112] [2024-11-07 19:30:28,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:28,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:28,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:28,242 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:30:28,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-07 19:30:28,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:28,368 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-07 19:30:28,369 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:28,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:30:28,430 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:30:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:30:28,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416407112] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:30:28,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:30:28,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-07 19:30:28,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005710590] [2024-11-07 19:30:28,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:30:28,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-07 19:30:28,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:28,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-07 19:30:28,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-07 19:30:28,642 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 120 [2024-11-07 19:30:28,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 224 transitions, 1812 flow. Second operand has 14 states, 14 states have (on average 70.42857142857143) internal successors, (986), 14 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:28,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:28,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 120 [2024-11-07 19:30:28,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:35,923 INFO L124 PetriNetUnfolderBase]: 39538/86424 cut-off events. [2024-11-07 19:30:35,923 INFO L125 PetriNetUnfolderBase]: For 842/842 co-relation queries the response was YES. [2024-11-07 19:30:36,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141427 conditions, 86424 events. 39538/86424 cut-off events. For 842/842 co-relation queries the response was YES. Maximal size of possible extension queue 4089. Compared 1063950 event pairs, 25056 based on Foata normal form. 9/67425 useless extension candidates. Maximal degree in co-relation 47785. Up to 26472 conditions per place. [2024-11-07 19:30:36,764 INFO L140 encePairwiseOnDemand]: 107/120 looper letters, 156 selfloop transitions, 81 changer transitions 0/290 dead transitions. [2024-11-07 19:30:36,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 290 transitions, 2624 flow [2024-11-07 19:30:36,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-07 19:30:36,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-07 19:30:36,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 641 transitions. [2024-11-07 19:30:36,766 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6677083333333333 [2024-11-07 19:30:36,766 INFO L175 Difference]: Start difference. First operand has 174 places, 224 transitions, 1812 flow. Second operand 8 states and 641 transitions. [2024-11-07 19:30:36,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 290 transitions, 2624 flow [2024-11-07 19:30:36,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 290 transitions, 2490 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-11-07 19:30:36,779 INFO L231 Difference]: Finished difference. Result has 177 places, 229 transitions, 1950 flow [2024-11-07 19:30:36,780 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=1728, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1950, PETRI_PLACES=177, PETRI_TRANSITIONS=229} [2024-11-07 19:30:36,780 INFO L277 CegarLoopForPetriNet]: 114 programPoint places, 63 predicate places. [2024-11-07 19:30:36,780 INFO L471 AbstractCegarLoop]: Abstraction has has 177 places, 229 transitions, 1950 flow [2024-11-07 19:30:36,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 70.42857142857143) internal successors, (986), 14 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:36,781 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:36,781 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:36,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-07 19:30:36,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:36,981 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 86 more)] === [2024-11-07 19:30:36,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:36,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1162836769, now seen corresponding path program 2 times [2024-11-07 19:30:36,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:36,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622929660] [2024-11-07 19:30:36,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:36,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:37,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:37,249 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:30:37,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:37,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622929660] [2024-11-07 19:30:37,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622929660] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:37,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023292438] [2024-11-07 19:30:37,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:30:37,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:37,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:37,252 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:30:37,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-07 19:30:37,373 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:30:37,373 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:30:37,375 INFO L255 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-07 19:30:37,382 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:37,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-07 19:30:37,489 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 36 [2024-11-07 19:30:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:30:37,580 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:30:37,740 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:30:37,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023292438] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:30:37,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:30:37,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 21 [2024-11-07 19:30:37,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813541246] [2024-11-07 19:30:37,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:30:37,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-07 19:30:37,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:37,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-07 19:30:37,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2024-11-07 19:30:38,766 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 120 [2024-11-07 19:30:38,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 229 transitions, 1950 flow. Second operand has 22 states, 22 states have (on average 68.0) internal successors, (1496), 22 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:38,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:38,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 120 [2024-11-07 19:30:38,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand