./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-word-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4f9af400 extending candidate: java ['java'] extending candidate: /usr/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/oracle-jdk-bin-*/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/openjdk-*/bin/java ['java', '/usr/bin/java'] extending candidate: /usr/lib/jvm/java-*-openjdk-amd64/bin/java ['java', '/usr/bin/java', '/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java', '/usr/lib/jvm/java-17-openjdk-amd64/bin/java', '/usr/lib/jvm/java-11-openjdk-amd64/bin/java', '/usr/lib/jvm/java-1.17.0-openjdk-amd64/bin/java'] ['/root/.sdkman/candidates/java/21.0.5-tem/bin/java', '-Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config', '-Xmx15G', '-Xms4m', '-jar', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar', '-data', '@noDefault', '-ultimatedata', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data', '-tc', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml', '-i', '../sv-benchmarks/c/weaver/chl-word-symm.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', 'bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e'] Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/chl-word-symm.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 bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-07 19:30:40,868 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-07 19:30:40,966 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-07 19:30:40,972 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-07 19:30:40,973 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-07 19:30:41,001 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-07 19:30:41,001 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-07 19:30:41,002 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-07 19:30:41,003 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-07 19:30:41,003 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-07 19:30:41,003 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-07 19:30:41,003 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-07 19:30:41,004 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-07 19:30:41,004 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-07 19:30:41,004 INFO L153 SettingsManager]: * Use SBE=true [2024-11-07 19:30:41,004 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-07 19:30:41,005 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-07 19:30:41,005 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-07 19:30:41,005 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-07 19:30:41,005 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-07 19:30:41,006 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-07 19:30:41,006 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-07 19:30:41,006 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-07 19:30:41,006 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-07 19:30:41,006 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-07 19:30:41,006 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-07 19:30:41,006 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-07 19:30:41,006 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-07 19:30:41,006 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-07 19:30:41,006 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-07 19:30:41,006 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-07 19:30:41,006 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-07 19:30:41,006 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-07 19:30:41,006 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:30:41,006 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-07 19:30:41,007 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-07 19:30:41,007 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-07 19:30:41,007 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-07 19:30:41,007 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-07 19:30:41,007 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-07 19:30:41,007 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-07 19:30:41,007 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-07 19:30:41,007 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 -> bf81f7b3bd1ceac2bf46c7c37f69effc0af9de17b18c7565156301fb49a6164e [2024-11-07 19:30:41,274 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-07 19:30:41,283 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-07 19:30:41,286 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-07 19:30:41,287 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-07 19:30:41,287 INFO L274 PluginConnector]: CDTParser initialized [2024-11-07 19:30:41,289 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2024-11-07 19:30:42,572 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-07 19:30:42,808 INFO L384 CDTParser]: Found 1 translation units. [2024-11-07 19:30:42,808 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/chl-word-symm.wvr.c [2024-11-07 19:30:42,814 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b96bc8573/b1aa97a9e21940289d45366706086df5/FLAG3551e7e56 [2024-11-07 19:30:42,825 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/b96bc8573/b1aa97a9e21940289d45366706086df5 [2024-11-07 19:30:42,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-07 19:30:42,828 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-07 19:30:42,829 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-07 19:30:42,829 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-07 19:30:42,832 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-07 19:30:42,833 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:30:42" (1/1) ... [2024-11-07 19:30:42,834 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d576afa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:30:42, skipping insertion in model container [2024-11-07 19:30:42,834 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:30:42" (1/1) ... [2024-11-07 19:30:42,847 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-07 19:30:43,000 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-07 19:30:43,002 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:30:43,014 INFO L200 MainTranslator]: Completed pre-run [2024-11-07 19:30:43,034 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:30:43,050 INFO L204 MainTranslator]: Completed translation [2024-11-07 19:30:43,051 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:30:43 WrapperNode [2024-11-07 19:30:43,051 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-07 19:30:43,052 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-07 19:30:43,052 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-07 19:30:43,052 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-07 19:30:43,058 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:30:43" (1/1) ... [2024-11-07 19:30:43,068 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:30:43" (1/1) ... [2024-11-07 19:30:43,091 INFO L138 Inliner]: procedures = 23, calls = 26, calls flagged for inlining = 10, calls inlined = 12, statements flattened = 125 [2024-11-07 19:30:43,093 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-07 19:30:43,093 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-07 19:30:43,093 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-07 19:30:43,093 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-07 19:30:43,102 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:30:43" (1/1) ... [2024-11-07 19:30:43,102 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:30:43" (1/1) ... [2024-11-07 19:30:43,108 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:30:43" (1/1) ... [2024-11-07 19:30:43,124 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-07 19:30:43,124 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:30:43" (1/1) ... [2024-11-07 19:30:43,124 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:30:43" (1/1) ... [2024-11-07 19:30:43,137 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:30:43" (1/1) ... [2024-11-07 19:30:43,141 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:30:43" (1/1) ... [2024-11-07 19:30:43,142 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:30:43" (1/1) ... [2024-11-07 19:30:43,143 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:30:43" (1/1) ... [2024-11-07 19:30:43,149 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-07 19:30:43,149 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-07 19:30:43,149 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-07 19:30:43,150 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-07 19:30:43,151 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:30:43" (1/1) ... [2024-11-07 19:30:43,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:30:43,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:43,175 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-07 19:30:43,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-07 19:30:43,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-07 19:30:43,204 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-07 19:30:43,204 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-07 19:30:43,204 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-07 19:30:43,204 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-07 19:30:43,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-07 19:30:43,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-07 19:30:43,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-07 19:30:43,204 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-07 19:30:43,204 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-07 19:30:43,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-07 19:30:43,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-07 19:30:43,204 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-07 19:30:43,204 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-07 19:30:43,206 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-07 19:30:43,288 INFO L238 CfgBuilder]: Building ICFG [2024-11-07 19:30:43,289 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-07 19:30:43,655 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-07 19:30:43,656 INFO L287 CfgBuilder]: Performing block encoding [2024-11-07 19:30:43,901 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-07 19:30:43,902 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-07 19:30:43,902 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:30:43 BoogieIcfgContainer [2024-11-07 19:30:43,903 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-07 19:30:43,905 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-07 19:30:43,905 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-07 19:30:43,909 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-07 19:30:43,909 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:30:42" (1/3) ... [2024-11-07 19:30:43,909 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d06a0c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:30:43, skipping insertion in model container [2024-11-07 19:30:43,909 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:30:43" (2/3) ... [2024-11-07 19:30:43,910 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d06a0c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:30:43, skipping insertion in model container [2024-11-07 19:30:43,910 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:30:43" (3/3) ... [2024-11-07 19:30:43,910 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-word-symm.wvr.c [2024-11-07 19:30:43,923 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-07 19:30:43,923 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-11-07 19:30:43,924 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-07 19:30:44,013 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-07 19:30:44,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 66 transitions, 146 flow [2024-11-07 19:30:44,092 INFO L124 PetriNetUnfolderBase]: 8/64 cut-off events. [2024-11-07 19:30:44,095 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-07 19:30:44,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 64 events. 8/64 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 174 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2024-11-07 19:30:44,099 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 66 transitions, 146 flow [2024-11-07 19:30:44,102 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 63 transitions, 138 flow [2024-11-07 19:30:44,108 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 19:30:44,120 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;@6014e5a2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 19:30:44,120 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-11-07 19:30:44,127 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 19:30:44,127 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-07 19:30:44,127 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 19:30:44,127 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:44,128 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:30:44,128 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:30:44,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:44,132 INFO L85 PathProgramCache]: Analyzing trace with hash 580331, now seen corresponding path program 1 times [2024-11-07 19:30:44,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:44,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739390954] [2024-11-07 19:30:44,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:44,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:44,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:44,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:44,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739390954] [2024-11-07 19:30:44,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739390954] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:44,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:30:44,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-07 19:30:44,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804258600] [2024-11-07 19:30:44,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:44,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:30:44,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:44,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:30:44,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:30:44,433 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-07 19:30:44,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:44,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:44,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-07 19:30:44,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:44,636 INFO L124 PetriNetUnfolderBase]: 233/554 cut-off events. [2024-11-07 19:30:44,636 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-07 19:30:44,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 941 conditions, 554 events. 233/554 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2985 event pairs, 138 based on Foata normal form. 1/370 useless extension candidates. Maximal degree in co-relation 872. Up to 354 conditions per place. [2024-11-07 19:30:44,646 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 30 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2024-11-07 19:30:44,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 194 flow [2024-11-07 19:30:44,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:30:44,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:30:44,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 125 transitions. [2024-11-07 19:30:44,660 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6313131313131313 [2024-11-07 19:30:44,661 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 138 flow. Second operand 3 states and 125 transitions. [2024-11-07 19:30:44,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 194 flow [2024-11-07 19:30:44,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 59 transitions, 186 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-07 19:30:44,671 INFO L231 Difference]: Finished difference. Result has 56 places, 59 transitions, 126 flow [2024-11-07 19:30:44,673 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=56, PETRI_TRANSITIONS=59} [2024-11-07 19:30:44,677 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -6 predicate places. [2024-11-07 19:30:44,678 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 59 transitions, 126 flow [2024-11-07 19:30:44,678 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:44,678 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:44,678 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:30:44,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-07 19:30:44,678 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:30:44,679 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:44,679 INFO L85 PathProgramCache]: Analyzing trace with hash 580332, now seen corresponding path program 1 times [2024-11-07 19:30:44,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:44,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365789150] [2024-11-07 19:30:44,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:44,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:44,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:45,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:45,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365789150] [2024-11-07 19:30:45,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365789150] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:45,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:30:45,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:30:45,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983562211] [2024-11-07 19:30:45,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:45,015 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:30:45,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:45,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:30:45,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:30:45,090 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-07 19:30:45,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 59 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:45,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:45,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-07 19:30:45,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:45,266 INFO L124 PetriNetUnfolderBase]: 234/557 cut-off events. [2024-11-07 19:30:45,267 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-07 19:30:45,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 934 conditions, 557 events. 234/557 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3000 event pairs, 138 based on Foata normal form. 0/370 useless extension candidates. Maximal degree in co-relation 905. Up to 363 conditions per place. [2024-11-07 19:30:45,271 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 33 selfloop transitions, 4 changer transitions 0/62 dead transitions. [2024-11-07 19:30:45,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 62 transitions, 206 flow [2024-11-07 19:30:45,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:30:45,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:30:45,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 158 transitions. [2024-11-07 19:30:45,273 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5984848484848485 [2024-11-07 19:30:45,273 INFO L175 Difference]: Start difference. First operand has 56 places, 59 transitions, 126 flow. Second operand 4 states and 158 transitions. [2024-11-07 19:30:45,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 62 transitions, 206 flow [2024-11-07 19:30:45,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 62 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:30:45,276 INFO L231 Difference]: Finished difference. Result has 59 places, 62 transitions, 149 flow [2024-11-07 19:30:45,276 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=149, PETRI_PLACES=59, PETRI_TRANSITIONS=62} [2024-11-07 19:30:45,277 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -3 predicate places. [2024-11-07 19:30:45,277 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 62 transitions, 149 flow [2024-11-07 19:30:45,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:45,277 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:45,277 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-07 19:30:45,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-07 19:30:45,278 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:30:45,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:45,278 INFO L85 PathProgramCache]: Analyzing trace with hash 17991939, now seen corresponding path program 1 times [2024-11-07 19:30:45,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:45,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275730715] [2024-11-07 19:30:45,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:45,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:45,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:45,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:45,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:45,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275730715] [2024-11-07 19:30:45,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275730715] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:45,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:30:45,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:30:45,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752731796] [2024-11-07 19:30:45,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:45,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:30:45,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:45,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:30:45,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:30:45,644 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-07 19:30:45,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 62 transitions, 149 flow. Second operand has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:45,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:45,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-07 19:30:45,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:45,828 INFO L124 PetriNetUnfolderBase]: 235/560 cut-off events. [2024-11-07 19:30:45,828 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-07 19:30:45,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 560 events. 235/560 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3026 event pairs, 138 based on Foata normal form. 0/372 useless extension candidates. Maximal degree in co-relation 926. Up to 362 conditions per place. [2024-11-07 19:30:45,832 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 33 selfloop transitions, 7 changer transitions 0/65 dead transitions. [2024-11-07 19:30:45,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 65 transitions, 235 flow [2024-11-07 19:30:45,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:30:45,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:30:45,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 191 transitions. [2024-11-07 19:30:45,834 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5787878787878787 [2024-11-07 19:30:45,835 INFO L175 Difference]: Start difference. First operand has 59 places, 62 transitions, 149 flow. Second operand 5 states and 191 transitions. [2024-11-07 19:30:45,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 65 transitions, 235 flow [2024-11-07 19:30:45,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 65 transitions, 232 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:30:45,837 INFO L231 Difference]: Finished difference. Result has 64 places, 65 transitions, 183 flow [2024-11-07 19:30:45,837 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=183, PETRI_PLACES=64, PETRI_TRANSITIONS=65} [2024-11-07 19:30:45,837 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 2 predicate places. [2024-11-07 19:30:45,838 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 65 transitions, 183 flow [2024-11-07 19:30:45,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.8) internal successors, (154), 5 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:45,838 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:45,838 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-07 19:30:45,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-07 19:30:45,838 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:30:45,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:45,839 INFO L85 PathProgramCache]: Analyzing trace with hash 557718160, now seen corresponding path program 1 times [2024-11-07 19:30:45,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:45,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199567958] [2024-11-07 19:30:45,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:45,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:46,080 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:46,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:46,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199567958] [2024-11-07 19:30:46,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199567958] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:46,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170348823] [2024-11-07 19:30:46,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:46,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:46,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:46,084 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:30:46,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-07 19:30:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:46,154 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-07 19:30:46,158 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:46,220 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 19:30:46,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:46,408 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:30:46,526 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:46,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170348823] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:30:46,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:30:46,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-07 19:30:46,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284430910] [2024-11-07 19:30:46,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:30:46,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-07 19:30:46,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:46,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-07 19:30:46,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-07 19:30:46,925 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-07 19:30:46,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 65 transitions, 183 flow. Second operand has 11 states, 11 states have (on average 31.363636363636363) internal successors, (345), 11 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:46,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:46,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-07 19:30:46,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:47,280 INFO L124 PetriNetUnfolderBase]: 236/562 cut-off events. [2024-11-07 19:30:47,280 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-07 19:30:47,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 974 conditions, 562 events. 236/562 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3043 event pairs, 138 based on Foata normal form. 0/377 useless extension candidates. Maximal degree in co-relation 936. Up to 363 conditions per place. [2024-11-07 19:30:47,285 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 32 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2024-11-07 19:30:47,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 67 transitions, 278 flow [2024-11-07 19:30:47,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-07 19:30:47,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-07 19:30:47,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 281 transitions. [2024-11-07 19:30:47,290 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5321969696969697 [2024-11-07 19:30:47,290 INFO L175 Difference]: Start difference. First operand has 64 places, 65 transitions, 183 flow. Second operand 8 states and 281 transitions. [2024-11-07 19:30:47,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 67 transitions, 278 flow [2024-11-07 19:30:47,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 67 transitions, 277 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:30:47,293 INFO L231 Difference]: Finished difference. Result has 69 places, 67 transitions, 213 flow [2024-11-07 19:30:47,293 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=213, PETRI_PLACES=69, PETRI_TRANSITIONS=67} [2024-11-07 19:30:47,293 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 7 predicate places. [2024-11-07 19:30:47,293 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 67 transitions, 213 flow [2024-11-07 19:30:47,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.363636363636363) internal successors, (345), 11 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:47,294 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:47,294 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-07 19:30:47,311 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-07 19:30:47,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:47,495 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:30:47,496 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:47,496 INFO L85 PathProgramCache]: Analyzing trace with hash 110403512, now seen corresponding path program 1 times [2024-11-07 19:30:47,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:47,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925727435] [2024-11-07 19:30:47,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:47,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:47,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:47,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:47,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925727435] [2024-11-07 19:30:47,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925727435] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:47,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885351266] [2024-11-07 19:30:47,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:47,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:47,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:47,728 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 19:30:47,729 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 19:30:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:47,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-07 19:30:47,794 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:47,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-07 19:30:47,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:47,986 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:30:48,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:48,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885351266] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:30:48,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:30:48,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-07 19:30:48,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32368730] [2024-11-07 19:30:48,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:30:48,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-07 19:30:48,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:48,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-07 19:30:48,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-07 19:30:48,749 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-07 19:30:48,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 67 transitions, 213 flow. Second operand has 13 states, 13 states have (on average 31.307692307692307) internal successors, (407), 13 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:48,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:48,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-07 19:30:48,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:49,055 INFO L124 PetriNetUnfolderBase]: 236/561 cut-off events. [2024-11-07 19:30:49,057 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-07 19:30:49,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 981 conditions, 561 events. 236/561 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3046 event pairs, 138 based on Foata normal form. 0/377 useless extension candidates. Maximal degree in co-relation 935. Up to 354 conditions per place. [2024-11-07 19:30:49,063 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 26 selfloop transitions, 15 changer transitions 0/66 dead transitions. [2024-11-07 19:30:49,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 66 transitions, 291 flow [2024-11-07 19:30:49,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-07 19:30:49,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-07 19:30:49,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 249 transitions. [2024-11-07 19:30:49,068 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.538961038961039 [2024-11-07 19:30:49,068 INFO L175 Difference]: Start difference. First operand has 69 places, 67 transitions, 213 flow. Second operand 7 states and 249 transitions. [2024-11-07 19:30:49,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 66 transitions, 291 flow [2024-11-07 19:30:49,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 66 transitions, 244 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-07 19:30:49,072 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 192 flow [2024-11-07 19:30:49,072 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=192, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-11-07 19:30:49,072 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 4 predicate places. [2024-11-07 19:30:49,074 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 192 flow [2024-11-07 19:30:49,075 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 31.307692307692307) internal successors, (407), 13 states have internal predecessors, (407), 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 19:30:49,075 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:49,075 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:49,094 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-07 19:30:49,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:49,276 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:30:49,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:49,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1179744335, now seen corresponding path program 1 times [2024-11-07 19:30:49,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:49,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681551518] [2024-11-07 19:30:49,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:49,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:49,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:49,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:49,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:49,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681551518] [2024-11-07 19:30:49,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681551518] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:49,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:30:49,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:30:49,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063740251] [2024-11-07 19:30:49,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:49,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:30:49,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:49,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:30:49,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:30:49,393 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-07 19:30:49,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 192 flow. Second operand has 5 states, 5 states have (on average 32.4) internal successors, (162), 5 states have internal predecessors, (162), 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 19:30:49,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:49,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-07 19:30:49,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:49,594 INFO L124 PetriNetUnfolderBase]: 436/1017 cut-off events. [2024-11-07 19:30:49,594 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-07 19:30:49,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1773 conditions, 1017 events. 436/1017 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6237 event pairs, 234 based on Foata normal form. 0/690 useless extension candidates. Maximal degree in co-relation 1049. Up to 409 conditions per place. [2024-11-07 19:30:49,599 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 75 selfloop transitions, 7 changer transitions 0/106 dead transitions. [2024-11-07 19:30:49,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 106 transitions, 467 flow [2024-11-07 19:30:49,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:30:49,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:30:49,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 263 transitions. [2024-11-07 19:30:49,601 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6641414141414141 [2024-11-07 19:30:49,601 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 192 flow. Second operand 6 states and 263 transitions. [2024-11-07 19:30:49,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 106 transitions, 467 flow [2024-11-07 19:30:49,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 106 transitions, 426 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-07 19:30:49,604 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 210 flow [2024-11-07 19:30:49,604 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=210, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2024-11-07 19:30:49,605 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 7 predicate places. [2024-11-07 19:30:49,605 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 210 flow [2024-11-07 19:30:49,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.4) internal successors, (162), 5 states have internal predecessors, (162), 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 19:30:49,605 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:49,605 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:49,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-07 19:30:49,606 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:30:49,606 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:49,606 INFO L85 PathProgramCache]: Analyzing trace with hash 148683071, now seen corresponding path program 1 times [2024-11-07 19:30:49,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:49,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130995919] [2024-11-07 19:30:49,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:49,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:49,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:49,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:49,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:49,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130995919] [2024-11-07 19:30:49,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130995919] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:49,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:30:49,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:30:49,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561674158] [2024-11-07 19:30:49,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:49,698 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:30:49,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:49,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:30:49,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:30:49,734 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 66 [2024-11-07 19:30:49,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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 19:30:49,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:49,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 66 [2024-11-07 19:30:49,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:49,876 INFO L124 PetriNetUnfolderBase]: 532/1174 cut-off events. [2024-11-07 19:30:49,876 INFO L125 PetriNetUnfolderBase]: For 153/153 co-relation queries the response was YES. [2024-11-07 19:30:49,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2210 conditions, 1174 events. 532/1174 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6996 event pairs, 356 based on Foata normal form. 0/942 useless extension candidates. Maximal degree in co-relation 1320. Up to 832 conditions per place. [2024-11-07 19:30:49,885 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 44 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2024-11-07 19:30:49,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 66 transitions, 298 flow [2024-11-07 19:30:49,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:30:49,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:30:49,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 131 transitions. [2024-11-07 19:30:49,888 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4962121212121212 [2024-11-07 19:30:49,888 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 210 flow. Second operand 4 states and 131 transitions. [2024-11-07 19:30:49,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 66 transitions, 298 flow [2024-11-07 19:30:49,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 66 transitions, 293 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:30:49,890 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 205 flow [2024-11-07 19:30:49,890 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-11-07 19:30:49,891 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 4 predicate places. [2024-11-07 19:30:49,891 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 205 flow [2024-11-07 19:30:49,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.25) internal successors, (101), 4 states have internal predecessors, (101), 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 19:30:49,891 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:49,891 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:49,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-07 19:30:49,891 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:30:49,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:49,891 INFO L85 PathProgramCache]: Analyzing trace with hash 148683072, now seen corresponding path program 1 times [2024-11-07 19:30:49,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:49,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213015409] [2024-11-07 19:30:49,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:49,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:49,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:30:49,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:49,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213015409] [2024-11-07 19:30:49,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213015409] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:49,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:30:49,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:30:49,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309958194] [2024-11-07 19:30:49,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:49,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:30:49,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:49,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:30:49,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:30:50,007 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-07 19:30:50,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 205 flow. Second operand has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:50,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:50,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-07 19:30:50,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:50,185 INFO L124 PetriNetUnfolderBase]: 390/782 cut-off events. [2024-11-07 19:30:50,185 INFO L125 PetriNetUnfolderBase]: For 123/123 co-relation queries the response was YES. [2024-11-07 19:30:50,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1564 conditions, 782 events. 390/782 cut-off events. For 123/123 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3772 event pairs, 224 based on Foata normal form. 0/615 useless extension candidates. Maximal degree in co-relation 1073. Up to 407 conditions per place. [2024-11-07 19:30:50,189 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 68 selfloop transitions, 7 changer transitions 0/95 dead transitions. [2024-11-07 19:30:50,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 95 transitions, 436 flow [2024-11-07 19:30:50,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:30:50,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:30:50,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 256 transitions. [2024-11-07 19:30:50,191 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6464646464646465 [2024-11-07 19:30:50,191 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 205 flow. Second operand 6 states and 256 transitions. [2024-11-07 19:30:50,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 95 transitions, 436 flow [2024-11-07 19:30:50,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 95 transitions, 430 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:30:50,193 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 230 flow [2024-11-07 19:30:50,194 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=230, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2024-11-07 19:30:50,194 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 9 predicate places. [2024-11-07 19:30:50,194 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 230 flow [2024-11-07 19:30:50,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:50,195 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:50,195 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:50,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-07 19:30:50,195 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:30:50,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:50,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1430032755, now seen corresponding path program 1 times [2024-11-07 19:30:50,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:50,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176108087] [2024-11-07 19:30:50,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:50,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:50,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:50,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:30:50,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:50,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176108087] [2024-11-07 19:30:50,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176108087] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:50,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:30:50,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-07 19:30:50,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828997177] [2024-11-07 19:30:50,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:50,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:30:50,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:50,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:30:50,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:30:50,281 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-07 19:30:50,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 230 flow. Second operand has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:50,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:50,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-07 19:30:50,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:50,492 INFO L124 PetriNetUnfolderBase]: 688/1466 cut-off events. [2024-11-07 19:30:50,492 INFO L125 PetriNetUnfolderBase]: For 327/327 co-relation queries the response was YES. [2024-11-07 19:30:50,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3053 conditions, 1466 events. 688/1466 cut-off events. For 327/327 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 8753 event pairs, 398 based on Foata normal form. 16/1250 useless extension candidates. Maximal degree in co-relation 2077. Up to 630 conditions per place. [2024-11-07 19:30:50,499 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 77 selfloop transitions, 11 changer transitions 0/108 dead transitions. [2024-11-07 19:30:50,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 108 transitions, 527 flow [2024-11-07 19:30:50,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:30:50,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:30:50,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 226 transitions. [2024-11-07 19:30:50,501 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6848484848484848 [2024-11-07 19:30:50,501 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 230 flow. Second operand 5 states and 226 transitions. [2024-11-07 19:30:50,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 108 transitions, 527 flow [2024-11-07 19:30:50,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 108 transitions, 519 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:30:50,504 INFO L231 Difference]: Finished difference. Result has 74 places, 72 transitions, 284 flow [2024-11-07 19:30:50,504 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=284, PETRI_PLACES=74, PETRI_TRANSITIONS=72} [2024-11-07 19:30:50,505 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 12 predicate places. [2024-11-07 19:30:50,505 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 72 transitions, 284 flow [2024-11-07 19:30:50,505 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 32.8) internal successors, (164), 5 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:50,505 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:50,505 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:50,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-07 19:30:50,506 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:30:50,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:50,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1839389634, now seen corresponding path program 1 times [2024-11-07 19:30:50,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:50,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321738257] [2024-11-07 19:30:50,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:50,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:50,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:50,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:30:50,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:50,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321738257] [2024-11-07 19:30:50,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321738257] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:50,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:30:50,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:30:50,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143933809] [2024-11-07 19:30:50,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:50,613 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:30:50,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:50,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:30:50,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:30:50,672 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 66 [2024-11-07 19:30:50,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 284 flow. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:50,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:50,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 66 [2024-11-07 19:30:50,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:50,852 INFO L124 PetriNetUnfolderBase]: 766/1532 cut-off events. [2024-11-07 19:30:50,852 INFO L125 PetriNetUnfolderBase]: For 835/835 co-relation queries the response was YES. [2024-11-07 19:30:50,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3464 conditions, 1532 events. 766/1532 cut-off events. For 835/835 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 8561 event pairs, 540 based on Foata normal form. 0/1402 useless extension candidates. Maximal degree in co-relation 2237. Up to 1240 conditions per place. [2024-11-07 19:30:50,861 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 47 selfloop transitions, 7 changer transitions 0/68 dead transitions. [2024-11-07 19:30:50,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 68 transitions, 384 flow [2024-11-07 19:30:50,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:30:50,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:30:50,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-11-07 19:30:50,862 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-11-07 19:30:50,862 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 284 flow. Second operand 5 states and 154 transitions. [2024-11-07 19:30:50,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 68 transitions, 384 flow [2024-11-07 19:30:50,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 68 transitions, 379 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:30:50,866 INFO L231 Difference]: Finished difference. Result has 73 places, 68 transitions, 285 flow [2024-11-07 19:30:50,867 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=285, PETRI_PLACES=73, PETRI_TRANSITIONS=68} [2024-11-07 19:30:50,867 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 11 predicate places. [2024-11-07 19:30:50,867 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 68 transitions, 285 flow [2024-11-07 19:30:50,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:50,868 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:50,868 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:50,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-07 19:30:50,868 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:30:50,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:50,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1839389635, now seen corresponding path program 1 times [2024-11-07 19:30:50,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:50,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702887402] [2024-11-07 19:30:50,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:50,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:50,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:51,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:30:51,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:51,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702887402] [2024-11-07 19:30:51,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702887402] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:51,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875978773] [2024-11-07 19:30:51,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:51,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:51,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:51,069 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 19:30:51,071 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 19:30:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:51,150 INFO L255 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-07 19:30:51,151 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:51,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-07 19:30:51,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-07 19:30:51,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-07 19:30:51,217 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-07 19:30:51,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-07 19:30:51,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:30:51,271 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:30:51,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-07 19:30:51,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:30:51,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875978773] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:30:51,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:30:51,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-07 19:30:51,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707703601] [2024-11-07 19:30:51,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:30:51,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-07 19:30:51,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:51,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-07 19:30:51,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-07 19:30:52,129 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-07 19:30:52,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 68 transitions, 285 flow. Second operand has 13 states, 13 states have (on average 28.153846153846153) internal successors, (366), 13 states have internal predecessors, (366), 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 19:30:52,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:52,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-07 19:30:52,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:52,698 INFO L124 PetriNetUnfolderBase]: 936/1764 cut-off events. [2024-11-07 19:30:52,699 INFO L125 PetriNetUnfolderBase]: For 846/846 co-relation queries the response was YES. [2024-11-07 19:30:52,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4055 conditions, 1764 events. 936/1764 cut-off events. For 846/846 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 9345 event pairs, 413 based on Foata normal form. 0/1576 useless extension candidates. Maximal degree in co-relation 2815. Up to 561 conditions per place. [2024-11-07 19:30:52,708 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 87 selfloop transitions, 18 changer transitions 0/118 dead transitions. [2024-11-07 19:30:52,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 118 transitions, 628 flow [2024-11-07 19:30:52,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:30:52,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:30:52,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 335 transitions. [2024-11-07 19:30:52,710 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.563973063973064 [2024-11-07 19:30:52,710 INFO L175 Difference]: Start difference. First operand has 73 places, 68 transitions, 285 flow. Second operand 9 states and 335 transitions. [2024-11-07 19:30:52,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 118 transitions, 628 flow [2024-11-07 19:30:52,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 118 transitions, 616 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:30:52,714 INFO L231 Difference]: Finished difference. Result has 79 places, 72 transitions, 351 flow [2024-11-07 19:30:52,714 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=351, PETRI_PLACES=79, PETRI_TRANSITIONS=72} [2024-11-07 19:30:52,715 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 17 predicate places. [2024-11-07 19:30:52,715 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 72 transitions, 351 flow [2024-11-07 19:30:52,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 28.153846153846153) internal successors, (366), 13 states have internal predecessors, (366), 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 19:30:52,716 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:52,716 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:52,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-07 19:30:52,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:52,917 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:30:52,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:52,917 INFO L85 PathProgramCache]: Analyzing trace with hash 139680028, now seen corresponding path program 1 times [2024-11-07 19:30:52,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:52,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688059835] [2024-11-07 19:30:52,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:52,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:52,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:30:52,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:52,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688059835] [2024-11-07 19:30:52,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688059835] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:30:52,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:30:52,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-07 19:30:52,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993991113] [2024-11-07 19:30:52,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:30:52,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:30:52,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:52,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:30:52,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:30:53,024 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-07 19:30:53,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 72 transitions, 351 flow. Second operand has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:53,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:53,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-07 19:30:53,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:53,235 INFO L124 PetriNetUnfolderBase]: 798/1569 cut-off events. [2024-11-07 19:30:53,235 INFO L125 PetriNetUnfolderBase]: For 1635/1637 co-relation queries the response was YES. [2024-11-07 19:30:53,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3872 conditions, 1569 events. 798/1569 cut-off events. For 1635/1637 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 8328 event pairs, 486 based on Foata normal form. 13/1434 useless extension candidates. Maximal degree in co-relation 2680. Up to 856 conditions per place. [2024-11-07 19:30:53,243 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 74 selfloop transitions, 11 changer transitions 0/101 dead transitions. [2024-11-07 19:30:53,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 101 transitions, 632 flow [2024-11-07 19:30:53,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:30:53,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:30:53,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 219 transitions. [2024-11-07 19:30:53,245 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6636363636363637 [2024-11-07 19:30:53,245 INFO L175 Difference]: Start difference. First operand has 79 places, 72 transitions, 351 flow. Second operand 5 states and 219 transitions. [2024-11-07 19:30:53,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 101 transitions, 632 flow [2024-11-07 19:30:53,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 101 transitions, 593 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-11-07 19:30:53,250 INFO L231 Difference]: Finished difference. Result has 80 places, 76 transitions, 378 flow [2024-11-07 19:30:53,250 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=378, PETRI_PLACES=80, PETRI_TRANSITIONS=76} [2024-11-07 19:30:53,252 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 18 predicate places. [2024-11-07 19:30:53,253 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 76 transitions, 378 flow [2024-11-07 19:30:53,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:53,253 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:53,253 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:53,253 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-07 19:30:53,253 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:30:53,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:53,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1186504380, now seen corresponding path program 1 times [2024-11-07 19:30:53,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:53,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81036134] [2024-11-07 19:30:53,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:53,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:53,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:53,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:30:53,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:53,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81036134] [2024-11-07 19:30:53,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81036134] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:53,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834112611] [2024-11-07 19:30:53,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:53,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:53,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:53,415 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 19:30:53,423 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 19:30:53,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:53,500 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-07 19:30:53,501 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:53,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:30:53,579 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:30:53,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-07 19:30:53,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:30:53,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834112611] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:30:53,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:30:53,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-07 19:30:53,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526735344] [2024-11-07 19:30:53,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:30:53,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-07 19:30:53,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:53,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-07 19:30:53,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-07 19:30:53,913 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 66 [2024-11-07 19:30:53,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 76 transitions, 378 flow. Second operand has 11 states, 11 states have (on average 30.90909090909091) internal successors, (340), 11 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:53,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:53,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 66 [2024-11-07 19:30:53,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:54,378 INFO L124 PetriNetUnfolderBase]: 837/1552 cut-off events. [2024-11-07 19:30:54,379 INFO L125 PetriNetUnfolderBase]: For 1522/1522 co-relation queries the response was YES. [2024-11-07 19:30:54,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4020 conditions, 1552 events. 837/1552 cut-off events. For 1522/1522 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 7804 event pairs, 402 based on Foata normal form. 0/1457 useless extension candidates. Maximal degree in co-relation 2851. Up to 521 conditions per place. [2024-11-07 19:30:54,387 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 88 selfloop transitions, 18 changer transitions 0/120 dead transitions. [2024-11-07 19:30:54,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 120 transitions, 712 flow [2024-11-07 19:30:54,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-07 19:30:54,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-07 19:30:54,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 296 transitions. [2024-11-07 19:30:54,390 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6406926406926406 [2024-11-07 19:30:54,390 INFO L175 Difference]: Start difference. First operand has 80 places, 76 transitions, 378 flow. Second operand 7 states and 296 transitions. [2024-11-07 19:30:54,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 120 transitions, 712 flow [2024-11-07 19:30:54,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 120 transitions, 700 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:30:54,396 INFO L231 Difference]: Finished difference. Result has 85 places, 76 transitions, 421 flow [2024-11-07 19:30:54,396 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=421, PETRI_PLACES=85, PETRI_TRANSITIONS=76} [2024-11-07 19:30:54,397 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 23 predicate places. [2024-11-07 19:30:54,397 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 76 transitions, 421 flow [2024-11-07 19:30:54,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 30.90909090909091) internal successors, (340), 11 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:54,397 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:54,397 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:54,415 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-07 19:30:54,602 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,SelfDestructingSolverStorable12 [2024-11-07 19:30:54,603 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:30:54,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:54,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1861464815, now seen corresponding path program 1 times [2024-11-07 19:30:54,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:54,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590498328] [2024-11-07 19:30:54,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:54,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:54,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:54,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:30:54,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:54,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590498328] [2024-11-07 19:30:54,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590498328] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:54,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651370295] [2024-11-07 19:30:54,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:54,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:54,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:54,809 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 19:30:54,810 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 19:30:54,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:54,882 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-07 19:30:54,883 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:54,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:30:54,964 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:30:55,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-07 19:30:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:30:55,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651370295] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:30:55,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:30:55,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-07 19:30:55,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160012072] [2024-11-07 19:30:55,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:30:55,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-07 19:30:55,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:55,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-07 19:30:55,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-07 19:30:55,383 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 66 [2024-11-07 19:30:55,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 76 transitions, 421 flow. Second operand has 11 states, 11 states have (on average 30.272727272727273) internal successors, (333), 11 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:55,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:55,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 66 [2024-11-07 19:30:55,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:55,753 INFO L124 PetriNetUnfolderBase]: 1180/2133 cut-off events. [2024-11-07 19:30:55,753 INFO L125 PetriNetUnfolderBase]: For 3826/3886 co-relation queries the response was YES. [2024-11-07 19:30:55,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5829 conditions, 2133 events. 1180/2133 cut-off events. For 3826/3886 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 11102 event pairs, 488 based on Foata normal form. 0/1997 useless extension candidates. Maximal degree in co-relation 3768. Up to 736 conditions per place. [2024-11-07 19:30:55,768 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 97 selfloop transitions, 18 changer transitions 0/128 dead transitions. [2024-11-07 19:30:55,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 128 transitions, 883 flow [2024-11-07 19:30:55,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-07 19:30:55,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-07 19:30:55,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 289 transitions. [2024-11-07 19:30:55,770 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6255411255411255 [2024-11-07 19:30:55,770 INFO L175 Difference]: Start difference. First operand has 85 places, 76 transitions, 421 flow. Second operand 7 states and 289 transitions. [2024-11-07 19:30:55,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 128 transitions, 883 flow [2024-11-07 19:30:55,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 128 transitions, 842 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-11-07 19:30:55,777 INFO L231 Difference]: Finished difference. Result has 87 places, 79 transitions, 461 flow [2024-11-07 19:30:55,777 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=461, PETRI_PLACES=87, PETRI_TRANSITIONS=79} [2024-11-07 19:30:55,777 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 25 predicate places. [2024-11-07 19:30:55,777 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 79 transitions, 461 flow [2024-11-07 19:30:55,778 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 30.272727272727273) internal successors, (333), 11 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:55,778 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:55,778 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:55,795 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 19:30:55,982 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,SelfDestructingSolverStorable13 [2024-11-07 19:30:55,983 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:30:55,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:55,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1870833853, now seen corresponding path program 1 times [2024-11-07 19:30:55,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:55,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472183195] [2024-11-07 19:30:55,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:55,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:56,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:56,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:30:56,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:56,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472183195] [2024-11-07 19:30:56,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472183195] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:56,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071832221] [2024-11-07 19:30:56,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:56,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:56,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:56,170 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 19:30:56,172 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 19:30:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:56,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-07 19:30:56,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:56,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-07 19:30:56,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-07 19:30:56,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-07 19:30:56,307 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-07 19:30:56,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-07 19:30:56,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:30:56,372 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:30:56,471 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-07 19:30:56,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:30:56,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071832221] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:30:56,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:30:56,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-07 19:30:56,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965406859] [2024-11-07 19:30:56,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:30:56,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-07 19:30:56,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:56,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-07 19:30:56,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-07 19:31:00,697 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-07 19:31:04,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-07 19:31:08,742 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-07 19:31:12,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-07 19:31:16,816 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-07 19:31:20,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-07 19:31:21,075 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 66 [2024-11-07 19:31:21,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 79 transitions, 461 flow. Second operand has 13 states, 13 states have (on average 23.46153846153846) internal successors, (305), 13 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:21,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:21,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 66 [2024-11-07 19:31:21,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:21,690 INFO L124 PetriNetUnfolderBase]: 1148/2066 cut-off events. [2024-11-07 19:31:21,690 INFO L125 PetriNetUnfolderBase]: For 3743/3791 co-relation queries the response was YES. [2024-11-07 19:31:21,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5970 conditions, 2066 events. 1148/2066 cut-off events. For 3743/3791 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 10542 event pairs, 509 based on Foata normal form. 0/2018 useless extension candidates. Maximal degree in co-relation 3896. Up to 781 conditions per place. [2024-11-07 19:31:21,711 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 101 selfloop transitions, 18 changer transitions 0/132 dead transitions. [2024-11-07 19:31:21,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 132 transitions, 925 flow [2024-11-07 19:31:21,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:31:21,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:31:21,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 289 transitions. [2024-11-07 19:31:21,713 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48653198653198654 [2024-11-07 19:31:21,713 INFO L175 Difference]: Start difference. First operand has 87 places, 79 transitions, 461 flow. Second operand 9 states and 289 transitions. [2024-11-07 19:31:21,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 132 transitions, 925 flow [2024-11-07 19:31:21,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 132 transitions, 893 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-07 19:31:21,722 INFO L231 Difference]: Finished difference. Result has 92 places, 79 transitions, 484 flow [2024-11-07 19:31:21,722 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=484, PETRI_PLACES=92, PETRI_TRANSITIONS=79} [2024-11-07 19:31:21,723 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 30 predicate places. [2024-11-07 19:31:21,724 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 79 transitions, 484 flow [2024-11-07 19:31:21,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 23.46153846153846) internal successors, (305), 13 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:21,724 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:21,724 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:21,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-07 19:31:21,925 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,SelfDestructingSolverStorable14 [2024-11-07 19:31:21,925 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:31:21,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:21,925 INFO L85 PathProgramCache]: Analyzing trace with hash -428318647, now seen corresponding path program 1 times [2024-11-07 19:31:21,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:21,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547322778] [2024-11-07 19:31:21,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:21,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:21,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:31:22,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:22,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547322778] [2024-11-07 19:31:22,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547322778] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:22,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236708983] [2024-11-07 19:31:22,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:22,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:22,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:31:22,043 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:31:22,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-07 19:31:22,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:22,117 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-07 19:31:22,118 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:31:22,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:31:22,189 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:31:22,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:31:22,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236708983] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:31:22,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:31:22,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2024-11-07 19:31:22,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959564383] [2024-11-07 19:31:22,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:31:22,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-07 19:31:22,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:22,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-07 19:31:22,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-07 19:31:22,443 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-07 19:31:22,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 79 transitions, 484 flow. Second operand has 16 states, 16 states have (on average 33.125) internal successors, (530), 16 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:22,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:22,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-07 19:31:22,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:23,196 INFO L124 PetriNetUnfolderBase]: 2792/5128 cut-off events. [2024-11-07 19:31:23,197 INFO L125 PetriNetUnfolderBase]: For 11852/11963 co-relation queries the response was YES. [2024-11-07 19:31:23,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15516 conditions, 5128 events. 2792/5128 cut-off events. For 11852/11963 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 33079 event pairs, 1093 based on Foata normal form. 72/5122 useless extension candidates. Maximal degree in co-relation 8028. Up to 1002 conditions per place. [2024-11-07 19:31:23,224 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 231 selfloop transitions, 48 changer transitions 0/295 dead transitions. [2024-11-07 19:31:23,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 295 transitions, 2281 flow [2024-11-07 19:31:23,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-07 19:31:23,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-07 19:31:23,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 931 transitions. [2024-11-07 19:31:23,228 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6133069828722003 [2024-11-07 19:31:23,228 INFO L175 Difference]: Start difference. First operand has 92 places, 79 transitions, 484 flow. Second operand 23 states and 931 transitions. [2024-11-07 19:31:23,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 295 transitions, 2281 flow [2024-11-07 19:31:23,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 295 transitions, 2192 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-11-07 19:31:23,245 INFO L231 Difference]: Finished difference. Result has 113 places, 107 transitions, 843 flow [2024-11-07 19:31:23,246 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=843, PETRI_PLACES=113, PETRI_TRANSITIONS=107} [2024-11-07 19:31:23,246 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 51 predicate places. [2024-11-07 19:31:23,246 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 107 transitions, 843 flow [2024-11-07 19:31:23,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 33.125) internal successors, (530), 16 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:23,247 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:23,247 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:23,264 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-07 19:31:23,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:23,452 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:31:23,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:23,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1294948663, now seen corresponding path program 1 times [2024-11-07 19:31:23,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:23,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777411533] [2024-11-07 19:31:23,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:23,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:23,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:23,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:23,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:23,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777411533] [2024-11-07 19:31:23,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777411533] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:31:23,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:31:23,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:31:23,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141133896] [2024-11-07 19:31:23,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:31:23,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:31:23,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:23,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:31:23,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:31:23,604 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-07 19:31:23,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 107 transitions, 843 flow. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:23,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:23,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-07 19:31:23,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:24,135 INFO L124 PetriNetUnfolderBase]: 3045/5859 cut-off events. [2024-11-07 19:31:24,136 INFO L125 PetriNetUnfolderBase]: For 15824/16010 co-relation queries the response was YES. [2024-11-07 19:31:24,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17784 conditions, 5859 events. 3045/5859 cut-off events. For 15824/16010 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 42099 event pairs, 1702 based on Foata normal form. 54/5759 useless extension candidates. Maximal degree in co-relation 12853. Up to 3869 conditions per place. [2024-11-07 19:31:24,166 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 106 selfloop transitions, 1 changer transitions 9/133 dead transitions. [2024-11-07 19:31:24,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 133 transitions, 1192 flow [2024-11-07 19:31:24,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:31:24,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:31:24,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 182 transitions. [2024-11-07 19:31:24,168 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6893939393939394 [2024-11-07 19:31:24,168 INFO L175 Difference]: Start difference. First operand has 113 places, 107 transitions, 843 flow. Second operand 4 states and 182 transitions. [2024-11-07 19:31:24,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 133 transitions, 1192 flow [2024-11-07 19:31:24,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 133 transitions, 1155 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-11-07 19:31:24,185 INFO L231 Difference]: Finished difference. Result has 112 places, 107 transitions, 821 flow [2024-11-07 19:31:24,185 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=806, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=821, PETRI_PLACES=112, PETRI_TRANSITIONS=107} [2024-11-07 19:31:24,185 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 50 predicate places. [2024-11-07 19:31:24,185 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 107 transitions, 821 flow [2024-11-07 19:31:24,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:24,186 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:24,186 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:24,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-07 19:31:24,186 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:31:24,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:24,186 INFO L85 PathProgramCache]: Analyzing trace with hash 725935119, now seen corresponding path program 2 times [2024-11-07 19:31:24,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:24,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870578312] [2024-11-07 19:31:24,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:24,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:24,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:24,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:24,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:24,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870578312] [2024-11-07 19:31:24,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870578312] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:31:24,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:31:24,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:31:24,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573874388] [2024-11-07 19:31:24,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:31:24,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:31:24,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:24,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:31:24,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:31:24,295 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-07 19:31:24,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 107 transitions, 821 flow. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:24,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:24,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-07 19:31:24,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:24,869 INFO L124 PetriNetUnfolderBase]: 3285/6382 cut-off events. [2024-11-07 19:31:24,869 INFO L125 PetriNetUnfolderBase]: For 17855/18110 co-relation queries the response was YES. [2024-11-07 19:31:24,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19389 conditions, 6382 events. 3285/6382 cut-off events. For 17855/18110 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 47223 event pairs, 2166 based on Foata normal form. 45/6173 useless extension candidates. Maximal degree in co-relation 19257. Up to 4692 conditions per place. [2024-11-07 19:31:24,905 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 117 selfloop transitions, 1 changer transitions 7/142 dead transitions. [2024-11-07 19:31:24,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 142 transitions, 1328 flow [2024-11-07 19:31:24,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:31:24,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:31:24,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 180 transitions. [2024-11-07 19:31:24,906 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2024-11-07 19:31:24,906 INFO L175 Difference]: Start difference. First operand has 112 places, 107 transitions, 821 flow. Second operand 4 states and 180 transitions. [2024-11-07 19:31:24,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 142 transitions, 1328 flow [2024-11-07 19:31:24,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 142 transitions, 1322 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-07 19:31:24,993 INFO L231 Difference]: Finished difference. Result has 114 places, 107 transitions, 843 flow [2024-11-07 19:31:24,993 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=843, PETRI_PLACES=114, PETRI_TRANSITIONS=107} [2024-11-07 19:31:24,994 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 52 predicate places. [2024-11-07 19:31:24,994 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 107 transitions, 843 flow [2024-11-07 19:31:24,994 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:24,994 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:24,994 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:24,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-07 19:31:24,995 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:31:24,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:24,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1779849144, now seen corresponding path program 1 times [2024-11-07 19:31:24,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:24,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245311099] [2024-11-07 19:31:24,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:24,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:25,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:25,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:31:25,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:25,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245311099] [2024-11-07 19:31:25,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245311099] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:25,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309388728] [2024-11-07 19:31:25,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:25,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:25,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:31:25,074 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:31:25,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-07 19:31:25,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:25,147 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-07 19:31:25,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:31:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:31:25,226 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:31:25,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:31:25,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309388728] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:31:25,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:31:25,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 16 [2024-11-07 19:31:25,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803420912] [2024-11-07 19:31:25,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:31:25,310 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-07 19:31:25,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:25,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-07 19:31:25,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-11-07 19:31:25,554 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-07 19:31:25,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 107 transitions, 843 flow. Second operand has 16 states, 16 states have (on average 33.375) internal successors, (534), 16 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:25,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:25,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-07 19:31:25,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:26,253 INFO L124 PetriNetUnfolderBase]: 3043/5753 cut-off events. [2024-11-07 19:31:26,254 INFO L125 PetriNetUnfolderBase]: For 18205/18454 co-relation queries the response was YES. [2024-11-07 19:31:26,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18248 conditions, 5753 events. 3043/5753 cut-off events. For 18205/18454 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 39881 event pairs, 1735 based on Foata normal form. 72/5740 useless extension candidates. Maximal degree in co-relation 18115. Up to 1247 conditions per place. [2024-11-07 19:31:26,285 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 209 selfloop transitions, 46 changer transitions 0/271 dead transitions. [2024-11-07 19:31:26,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 271 transitions, 2279 flow [2024-11-07 19:31:26,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-07 19:31:26,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-07 19:31:26,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 860 transitions. [2024-11-07 19:31:26,287 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6204906204906205 [2024-11-07 19:31:26,288 INFO L175 Difference]: Start difference. First operand has 114 places, 107 transitions, 843 flow. Second operand 21 states and 860 transitions. [2024-11-07 19:31:26,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 271 transitions, 2279 flow [2024-11-07 19:31:26,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 271 transitions, 2267 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-07 19:31:26,317 INFO L231 Difference]: Finished difference. Result has 134 places, 125 transitions, 1138 flow [2024-11-07 19:31:26,318 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1138, PETRI_PLACES=134, PETRI_TRANSITIONS=125} [2024-11-07 19:31:26,318 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 72 predicate places. [2024-11-07 19:31:26,318 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 125 transitions, 1138 flow [2024-11-07 19:31:26,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 33.375) internal successors, (534), 16 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:26,319 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:26,319 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:26,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-07 19:31:26,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:26,523 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:31:26,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:26,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1069275252, now seen corresponding path program 1 times [2024-11-07 19:31:26,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:26,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869100440] [2024-11-07 19:31:26,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:26,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:26,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:26,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:26,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:26,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869100440] [2024-11-07 19:31:26,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869100440] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:31:26,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:31:26,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:31:26,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372203239] [2024-11-07 19:31:26,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:31:26,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:31:26,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:26,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:31:26,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:31:26,546 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-07 19:31:26,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 125 transitions, 1138 flow. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:26,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:26,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-07 19:31:26,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:26,894 INFO L124 PetriNetUnfolderBase]: 2161/4301 cut-off events. [2024-11-07 19:31:26,894 INFO L125 PetriNetUnfolderBase]: For 17968/18148 co-relation queries the response was YES. [2024-11-07 19:31:26,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14644 conditions, 4301 events. 2161/4301 cut-off events. For 17968/18148 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 29335 event pairs, 818 based on Foata normal form. 209/4448 useless extension candidates. Maximal degree in co-relation 10716. Up to 3107 conditions per place. [2024-11-07 19:31:26,916 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 111 selfloop transitions, 18 changer transitions 5/151 dead transitions. [2024-11-07 19:31:26,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 151 transitions, 1664 flow [2024-11-07 19:31:26,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:31:26,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:31:26,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 140 transitions. [2024-11-07 19:31:26,917 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7070707070707071 [2024-11-07 19:31:26,917 INFO L175 Difference]: Start difference. First operand has 134 places, 125 transitions, 1138 flow. Second operand 3 states and 140 transitions. [2024-11-07 19:31:26,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 151 transitions, 1664 flow [2024-11-07 19:31:26,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 151 transitions, 1623 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-11-07 19:31:26,939 INFO L231 Difference]: Finished difference. Result has 131 places, 141 transitions, 1415 flow [2024-11-07 19:31:26,940 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1097, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1415, PETRI_PLACES=131, PETRI_TRANSITIONS=141} [2024-11-07 19:31:26,940 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 69 predicate places. [2024-11-07 19:31:26,940 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 141 transitions, 1415 flow [2024-11-07 19:31:26,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:26,941 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:26,941 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:26,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-07 19:31:26,941 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:31:26,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:26,941 INFO L85 PathProgramCache]: Analyzing trace with hash -701278822, now seen corresponding path program 2 times [2024-11-07 19:31:26,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:26,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466046880] [2024-11-07 19:31:26,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:26,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:26,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:27,121 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 19:31:27,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:27,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466046880] [2024-11-07 19:31:27,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466046880] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:27,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377148125] [2024-11-07 19:31:27,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:31:27,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:27,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:31:27,124 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:31:27,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-07 19:31:27,213 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:31:27,213 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:31:27,215 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-07 19:31:27,217 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:31:27,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-07 19:31:27,299 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-07 19:31:27,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-07 19:31:27,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-07 19:31:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:31:27,427 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:31:27,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-07 19:31:27,732 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:31:27,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377148125] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:31:27,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:31:27,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 19 [2024-11-07 19:31:27,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296962623] [2024-11-07 19:31:27,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:31:27,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-07 19:31:27,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:27,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-07 19:31:27,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2024-11-07 19:31:28,701 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-07 19:31:28,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 141 transitions, 1415 flow. Second operand has 21 states, 21 states have (on average 28.142857142857142) internal successors, (591), 21 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:28,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:28,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-07 19:31:28,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:29,772 INFO L124 PetriNetUnfolderBase]: 2719/5083 cut-off events. [2024-11-07 19:31:29,772 INFO L125 PetriNetUnfolderBase]: For 23508/23679 co-relation queries the response was YES. [2024-11-07 19:31:29,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17925 conditions, 5083 events. 2719/5083 cut-off events. For 23508/23679 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 32837 event pairs, 1162 based on Foata normal form. 24/5067 useless extension candidates. Maximal degree in co-relation 13672. Up to 1675 conditions per place. [2024-11-07 19:31:29,790 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 188 selfloop transitions, 42 changer transitions 0/243 dead transitions. [2024-11-07 19:31:29,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 243 transitions, 2514 flow [2024-11-07 19:31:29,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-07 19:31:29,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-07 19:31:29,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 478 transitions. [2024-11-07 19:31:29,791 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5571095571095571 [2024-11-07 19:31:29,791 INFO L175 Difference]: Start difference. First operand has 131 places, 141 transitions, 1415 flow. Second operand 13 states and 478 transitions. [2024-11-07 19:31:29,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 243 transitions, 2514 flow [2024-11-07 19:31:29,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 243 transitions, 2426 flow, removed 44 selfloop flow, removed 2 redundant places. [2024-11-07 19:31:29,817 INFO L231 Difference]: Finished difference. Result has 143 places, 149 transitions, 1564 flow [2024-11-07 19:31:29,818 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1343, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1564, PETRI_PLACES=143, PETRI_TRANSITIONS=149} [2024-11-07 19:31:29,818 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 81 predicate places. [2024-11-07 19:31:29,818 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 149 transitions, 1564 flow [2024-11-07 19:31:29,818 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 28.142857142857142) internal successors, (591), 21 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:29,819 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:29,819 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:29,834 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 19:31:30,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:30,023 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:31:30,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:30,023 INFO L85 PathProgramCache]: Analyzing trace with hash -2029823056, now seen corresponding path program 1 times [2024-11-07 19:31:30,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:30,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866391456] [2024-11-07 19:31:30,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:30,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:30,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:30,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:30,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:30,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866391456] [2024-11-07 19:31:30,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866391456] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:31:30,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:31:30,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-07 19:31:30,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233357302] [2024-11-07 19:31:30,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:31:30,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-07 19:31:30,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:30,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-07 19:31:30,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-07 19:31:30,262 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-07 19:31:30,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 149 transitions, 1564 flow. Second operand has 8 states, 8 states have (on average 34.5) internal successors, (276), 8 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:30,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:30,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-07 19:31:30,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:30,617 INFO L124 PetriNetUnfolderBase]: 2421/4551 cut-off events. [2024-11-07 19:31:30,617 INFO L125 PetriNetUnfolderBase]: For 27025/27241 co-relation queries the response was YES. [2024-11-07 19:31:30,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17327 conditions, 4551 events. 2421/4551 cut-off events. For 27025/27241 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 29943 event pairs, 829 based on Foata normal form. 1/4472 useless extension candidates. Maximal degree in co-relation 13803. Up to 2233 conditions per place. [2024-11-07 19:31:30,638 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 155 selfloop transitions, 31 changer transitions 27/232 dead transitions. [2024-11-07 19:31:30,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 232 transitions, 2761 flow [2024-11-07 19:31:30,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-07 19:31:30,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-07 19:31:30,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 302 transitions. [2024-11-07 19:31:30,639 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6536796536796536 [2024-11-07 19:31:30,639 INFO L175 Difference]: Start difference. First operand has 143 places, 149 transitions, 1564 flow. Second operand 7 states and 302 transitions. [2024-11-07 19:31:30,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 232 transitions, 2761 flow [2024-11-07 19:31:30,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 232 transitions, 2712 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-11-07 19:31:30,668 INFO L231 Difference]: Finished difference. Result has 145 places, 169 transitions, 1897 flow [2024-11-07 19:31:30,668 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1515, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1897, PETRI_PLACES=145, PETRI_TRANSITIONS=169} [2024-11-07 19:31:30,668 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 83 predicate places. [2024-11-07 19:31:30,668 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 169 transitions, 1897 flow [2024-11-07 19:31:30,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 34.5) internal successors, (276), 8 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:30,669 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:30,669 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:30,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-07 19:31:30,669 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:31:30,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:30,669 INFO L85 PathProgramCache]: Analyzing trace with hash -264806459, now seen corresponding path program 1 times [2024-11-07 19:31:30,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:30,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789135305] [2024-11-07 19:31:30,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:30,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:30,839 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:31:30,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:30,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789135305] [2024-11-07 19:31:30,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789135305] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:30,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215797180] [2024-11-07 19:31:30,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:30,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:30,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:31:30,842 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:31:30,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-07 19:31:30,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:30,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-07 19:31:30,922 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:31:31,033 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:31:31,034 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:31:31,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-07 19:31:31,148 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:31:31,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215797180] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:31:31,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:31:31,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-07 19:31:31,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496402326] [2024-11-07 19:31:31,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:31:31,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-07 19:31:31,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:31,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-07 19:31:31,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-11-07 19:31:31,617 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 66 [2024-11-07 19:31:31,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 169 transitions, 1897 flow. Second operand has 20 states, 20 states have (on average 30.95) internal successors, (619), 20 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:31,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:31,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 66 [2024-11-07 19:31:31,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:32,202 INFO L124 PetriNetUnfolderBase]: 2606/4894 cut-off events. [2024-11-07 19:31:32,202 INFO L125 PetriNetUnfolderBase]: For 30103/30226 co-relation queries the response was YES. [2024-11-07 19:31:32,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20068 conditions, 4894 events. 2606/4894 cut-off events. For 30103/30226 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 31982 event pairs, 1099 based on Foata normal form. 26/4859 useless extension candidates. Maximal degree in co-relation 20005. Up to 1546 conditions per place. [2024-11-07 19:31:32,225 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 221 selfloop transitions, 47 changer transitions 0/284 dead transitions. [2024-11-07 19:31:32,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 284 transitions, 3285 flow [2024-11-07 19:31:32,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-07 19:31:32,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-07 19:31:32,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 417 transitions. [2024-11-07 19:31:32,226 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6318181818181818 [2024-11-07 19:31:32,226 INFO L175 Difference]: Start difference. First operand has 145 places, 169 transitions, 1897 flow. Second operand 10 states and 417 transitions. [2024-11-07 19:31:32,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 284 transitions, 3285 flow [2024-11-07 19:31:32,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 284 transitions, 3187 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-11-07 19:31:32,253 INFO L231 Difference]: Finished difference. Result has 151 places, 172 transitions, 2009 flow [2024-11-07 19:31:32,253 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1828, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2009, PETRI_PLACES=151, PETRI_TRANSITIONS=172} [2024-11-07 19:31:32,253 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 89 predicate places. [2024-11-07 19:31:32,253 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 172 transitions, 2009 flow [2024-11-07 19:31:32,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 30.95) internal successors, (619), 20 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:32,254 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:32,254 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:32,267 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 19:31:32,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-07 19:31:32,454 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:31:32,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:32,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1458126025, now seen corresponding path program 2 times [2024-11-07 19:31:32,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:32,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16501132] [2024-11-07 19:31:32,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:32,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:32,641 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 19:31:32,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:32,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16501132] [2024-11-07 19:31:32,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16501132] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:32,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869216232] [2024-11-07 19:31:32,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:31:32,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:32,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:31:32,644 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 19:31:32,646 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 19:31:32,725 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:31:32,725 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:31:32,726 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-07 19:31:32,727 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:31:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-07 19:31:32,872 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:31:33,054 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-11-07 19:31:33,104 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-07 19:31:33,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869216232] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:31:33,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:31:33,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-07 19:31:33,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621597495] [2024-11-07 19:31:33,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:31:33,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-07 19:31:33,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:33,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-07 19:31:33,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2024-11-07 19:31:33,946 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 66 [2024-11-07 19:31:33,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 172 transitions, 2009 flow. Second operand has 20 states, 20 states have (on average 29.45) internal successors, (589), 20 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:33,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:33,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 66 [2024-11-07 19:31:33,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:35,251 INFO L124 PetriNetUnfolderBase]: 3146/5425 cut-off events. [2024-11-07 19:31:35,251 INFO L125 PetriNetUnfolderBase]: For 46861/47205 co-relation queries the response was YES. [2024-11-07 19:31:35,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23238 conditions, 5425 events. 3146/5425 cut-off events. For 46861/47205 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 33662 event pairs, 712 based on Foata normal form. 33/5410 useless extension candidates. Maximal degree in co-relation 19766. Up to 1103 conditions per place. [2024-11-07 19:31:35,277 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 266 selfloop transitions, 75 changer transitions 0/357 dead transitions. [2024-11-07 19:31:35,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 357 transitions, 4527 flow [2024-11-07 19:31:35,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-07 19:31:35,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-07 19:31:35,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 737 transitions. [2024-11-07 19:31:35,279 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-11-07 19:31:35,279 INFO L175 Difference]: Start difference. First operand has 151 places, 172 transitions, 2009 flow. Second operand 21 states and 737 transitions. [2024-11-07 19:31:35,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 357 transitions, 4527 flow [2024-11-07 19:31:35,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 357 transitions, 4445 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-11-07 19:31:35,310 INFO L231 Difference]: Finished difference. Result has 167 places, 177 transitions, 2196 flow [2024-11-07 19:31:35,310 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1943, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2196, PETRI_PLACES=167, PETRI_TRANSITIONS=177} [2024-11-07 19:31:35,310 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 105 predicate places. [2024-11-07 19:31:35,310 INFO L471 AbstractCegarLoop]: Abstraction has has 167 places, 177 transitions, 2196 flow [2024-11-07 19:31:35,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 29.45) internal successors, (589), 20 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:35,311 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:35,311 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:35,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-07 19:31:35,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-07 19:31:35,511 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:31:35,511 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:35,512 INFO L85 PathProgramCache]: Analyzing trace with hash 2052384155, now seen corresponding path program 1 times [2024-11-07 19:31:35,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:35,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657746198] [2024-11-07 19:31:35,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:35,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:35,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:35,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:35,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:35,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657746198] [2024-11-07 19:31:35,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657746198] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:35,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837167212] [2024-11-07 19:31:35,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:35,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:35,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:31:35,694 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:31:35,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-07 19:31:35,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:35,772 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-07 19:31:35,775 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:31:36,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:36,040 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:31:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:36,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837167212] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:36,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-07 19:31:36,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 23 [2024-11-07 19:31:36,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616202382] [2024-11-07 19:31:36,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:31:36,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-07 19:31:36,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:36,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-07 19:31:36,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2024-11-07 19:31:36,624 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-07 19:31:36,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 177 transitions, 2196 flow. Second operand has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:36,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:36,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-07 19:31:36,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:37,474 INFO L124 PetriNetUnfolderBase]: 2652/4942 cut-off events. [2024-11-07 19:31:37,475 INFO L125 PetriNetUnfolderBase]: For 41693/41931 co-relation queries the response was YES. [2024-11-07 19:31:37,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21344 conditions, 4942 events. 2652/4942 cut-off events. For 41693/41931 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 33253 event pairs, 804 based on Foata normal form. 22/4884 useless extension candidates. Maximal degree in co-relation 18408. Up to 2146 conditions per place. [2024-11-07 19:31:37,503 INFO L140 encePairwiseOnDemand]: 53/66 looper letters, 197 selfloop transitions, 63 changer transitions 12/294 dead transitions. [2024-11-07 19:31:37,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 294 transitions, 3723 flow [2024-11-07 19:31:37,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-07 19:31:37,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-07 19:31:37,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 572 transitions. [2024-11-07 19:31:37,505 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-11-07 19:31:37,505 INFO L175 Difference]: Start difference. First operand has 167 places, 177 transitions, 2196 flow. Second operand 14 states and 572 transitions. [2024-11-07 19:31:37,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 294 transitions, 3723 flow [2024-11-07 19:31:37,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 294 transitions, 3551 flow, removed 25 selfloop flow, removed 13 redundant places. [2024-11-07 19:31:37,547 INFO L231 Difference]: Finished difference. Result has 174 places, 190 transitions, 2345 flow [2024-11-07 19:31:37,547 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2059, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2345, PETRI_PLACES=174, PETRI_TRANSITIONS=190} [2024-11-07 19:31:37,547 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 112 predicate places. [2024-11-07 19:31:37,547 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 190 transitions, 2345 flow [2024-11-07 19:31:37,547 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:37,547 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:37,548 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:37,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-07 19:31:37,748 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:37,748 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:31:37,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:37,749 INFO L85 PathProgramCache]: Analyzing trace with hash -2042732917, now seen corresponding path program 1 times [2024-11-07 19:31:37,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:37,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468046643] [2024-11-07 19:31:37,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:37,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:31:37,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:37,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468046643] [2024-11-07 19:31:37,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468046643] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:37,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789423475] [2024-11-07 19:31:37,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:37,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:37,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:31:37,918 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:31:37,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-07 19:31:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:38,005 INFO L255 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-07 19:31:38,006 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:31:38,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-07 19:31:38,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-07 19:31:38,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-07 19:31:38,078 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-07 19:31:38,078 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-07 19:31:38,166 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:31:38,166 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:31:38,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-07 19:31:38,370 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:31:38,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789423475] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:31:38,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:31:38,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-07 19:31:38,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990051425] [2024-11-07 19:31:38,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:31:38,371 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-07 19:31:38,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:38,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-07 19:31:38,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-11-07 19:31:39,154 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 66 [2024-11-07 19:31:39,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 190 transitions, 2345 flow. Second operand has 20 states, 20 states have (on average 29.55) internal successors, (591), 20 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:39,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:39,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 66 [2024-11-07 19:31:39,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:40,162 INFO L124 PetriNetUnfolderBase]: 3102/5724 cut-off events. [2024-11-07 19:31:40,162 INFO L125 PetriNetUnfolderBase]: For 49861/50191 co-relation queries the response was YES. [2024-11-07 19:31:40,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25215 conditions, 5724 events. 3102/5724 cut-off events. For 49861/50191 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 37667 event pairs, 1241 based on Foata normal form. 33/5714 useless extension candidates. Maximal degree in co-relation 25126. Up to 1832 conditions per place. [2024-11-07 19:31:40,187 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 251 selfloop transitions, 48 changer transitions 0/318 dead transitions. [2024-11-07 19:31:40,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 318 transitions, 4328 flow [2024-11-07 19:31:40,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-07 19:31:40,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-07 19:31:40,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 483 transitions. [2024-11-07 19:31:40,189 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5629370629370629 [2024-11-07 19:31:40,189 INFO L175 Difference]: Start difference. First operand has 174 places, 190 transitions, 2345 flow. Second operand 13 states and 483 transitions. [2024-11-07 19:31:40,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 318 transitions, 4328 flow [2024-11-07 19:31:40,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 318 transitions, 4196 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-11-07 19:31:40,228 INFO L231 Difference]: Finished difference. Result has 184 places, 195 transitions, 2466 flow [2024-11-07 19:31:40,228 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2267, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2466, PETRI_PLACES=184, PETRI_TRANSITIONS=195} [2024-11-07 19:31:40,229 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 122 predicate places. [2024-11-07 19:31:40,229 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 195 transitions, 2466 flow [2024-11-07 19:31:40,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 29.55) internal successors, (591), 20 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:40,229 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:40,229 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:40,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-07 19:31:40,429 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:40,430 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:31:40,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:40,430 INFO L85 PathProgramCache]: Analyzing trace with hash 243948797, now seen corresponding path program 2 times [2024-11-07 19:31:40,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:40,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459569604] [2024-11-07 19:31:40,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:40,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:40,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:40,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:40,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:40,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459569604] [2024-11-07 19:31:40,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459569604] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:40,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879336899] [2024-11-07 19:31:40,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:31:40,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:40,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:31:40,598 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:31:40,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-07 19:31:40,675 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-07 19:31:40,676 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:31:40,679 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-07 19:31:40,680 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:31:40,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:31:40,907 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-07 19:31:40,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879336899] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:31:40,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-07 19:31:40,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2024-11-07 19:31:40,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835080982] [2024-11-07 19:31:40,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:31:40,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-07 19:31:40,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:40,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-07 19:31:40,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-11-07 19:31:40,936 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-07 19:31:40,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 195 transitions, 2466 flow. Second operand has 8 states, 8 states have (on average 34.75) internal successors, (278), 8 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 19:31:40,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:40,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-07 19:31:40,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:41,580 INFO L124 PetriNetUnfolderBase]: 2777/5196 cut-off events. [2024-11-07 19:31:41,580 INFO L125 PetriNetUnfolderBase]: For 45139/45439 co-relation queries the response was YES. [2024-11-07 19:31:41,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23209 conditions, 5196 events. 2777/5196 cut-off events. For 45139/45439 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 34493 event pairs, 879 based on Foata normal form. 26/5136 useless extension candidates. Maximal degree in co-relation 22280. Up to 2671 conditions per place. [2024-11-07 19:31:41,611 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 192 selfloop transitions, 39 changer transitions 14/269 dead transitions. [2024-11-07 19:31:41,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 269 transitions, 3716 flow [2024-11-07 19:31:41,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:31:41,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:31:41,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 377 transitions. [2024-11-07 19:31:41,612 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6346801346801347 [2024-11-07 19:31:41,612 INFO L175 Difference]: Start difference. First operand has 184 places, 195 transitions, 2466 flow. Second operand 9 states and 377 transitions. [2024-11-07 19:31:41,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 269 transitions, 3716 flow [2024-11-07 19:31:41,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 269 transitions, 3683 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-07 19:31:41,652 INFO L231 Difference]: Finished difference. Result has 190 places, 197 transitions, 2570 flow [2024-11-07 19:31:41,653 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2433, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2570, PETRI_PLACES=190, PETRI_TRANSITIONS=197} [2024-11-07 19:31:41,653 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 128 predicate places. [2024-11-07 19:31:41,653 INFO L471 AbstractCegarLoop]: Abstraction has has 190 places, 197 transitions, 2570 flow [2024-11-07 19:31:41,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 34.75) internal successors, (278), 8 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 19:31:41,653 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:41,654 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:41,665 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-07 19:31:41,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-07 19:31:41,854 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:31:41,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:41,854 INFO L85 PathProgramCache]: Analyzing trace with hash -755207473, now seen corresponding path program 3 times [2024-11-07 19:31:41,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:41,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367649849] [2024-11-07 19:31:41,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:41,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:41,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:42,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:42,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:42,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367649849] [2024-11-07 19:31:42,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367649849] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:42,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69932312] [2024-11-07 19:31:42,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-07 19:31:42,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:42,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:31:42,056 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:31:42,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-07 19:31:42,144 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-07 19:31:42,145 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:31:42,150 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-07 19:31:42,151 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:31:42,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:31:42,407 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-07 19:31:42,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69932312] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:31:42,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-07 19:31:42,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2024-11-07 19:31:42,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49784389] [2024-11-07 19:31:42,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:31:42,408 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-07 19:31:42,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:42,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-07 19:31:42,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-11-07 19:31:42,434 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-07 19:31:42,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 197 transitions, 2570 flow. Second operand has 8 states, 8 states have (on average 34.75) internal successors, (278), 8 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 19:31:42,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:42,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-07 19:31:42,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:42,937 INFO L124 PetriNetUnfolderBase]: 2725/5088 cut-off events. [2024-11-07 19:31:42,937 INFO L125 PetriNetUnfolderBase]: For 47908/48208 co-relation queries the response was YES. [2024-11-07 19:31:42,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24164 conditions, 5088 events. 2725/5088 cut-off events. For 47908/48208 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 33496 event pairs, 865 based on Foata normal form. 26/5028 useless extension candidates. Maximal degree in co-relation 23950. Up to 2577 conditions per place. [2024-11-07 19:31:42,972 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 181 selfloop transitions, 36 changer transitions 25/266 dead transitions. [2024-11-07 19:31:42,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 266 transitions, 3744 flow [2024-11-07 19:31:42,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:31:42,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:31:42,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 378 transitions. [2024-11-07 19:31:42,973 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-11-07 19:31:42,973 INFO L175 Difference]: Start difference. First operand has 190 places, 197 transitions, 2570 flow. Second operand 9 states and 378 transitions. [2024-11-07 19:31:42,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 266 transitions, 3744 flow [2024-11-07 19:31:43,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 266 transitions, 3648 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-07 19:31:43,091 INFO L231 Difference]: Finished difference. Result has 192 places, 192 transitions, 2494 flow [2024-11-07 19:31:43,091 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2474, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2494, PETRI_PLACES=192, PETRI_TRANSITIONS=192} [2024-11-07 19:31:43,091 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 130 predicate places. [2024-11-07 19:31:43,092 INFO L471 AbstractCegarLoop]: Abstraction has has 192 places, 192 transitions, 2494 flow [2024-11-07 19:31:43,092 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 34.75) internal successors, (278), 8 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 19:31:43,092 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:43,092 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:43,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-07 19:31:43,292 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-07 19:31:43,292 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:31:43,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:43,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1255482953, now seen corresponding path program 4 times [2024-11-07 19:31:43,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:43,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967158466] [2024-11-07 19:31:43,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:43,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:43,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:43,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967158466] [2024-11-07 19:31:43,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967158466] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:43,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102458062] [2024-11-07 19:31:43,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-07 19:31:43,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:43,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:31:43,455 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:31:43,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-07 19:31:43,542 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-07 19:31:43,542 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:31:43,543 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-07 19:31:43,544 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:31:43,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:43,759 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:31:44,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:44,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102458062] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:44,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-07 19:31:44,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9, 10] total 27 [2024-11-07 19:31:44,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613877915] [2024-11-07 19:31:44,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:31:44,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-07 19:31:44,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:44,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-07 19:31:44,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2024-11-07 19:31:44,111 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-07 19:31:44,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 192 transitions, 2494 flow. Second operand has 10 states, 10 states have (on average 33.2) internal successors, (332), 10 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:44,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:44,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-07 19:31:44,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:45,093 INFO L124 PetriNetUnfolderBase]: 3698/7008 cut-off events. [2024-11-07 19:31:45,094 INFO L125 PetriNetUnfolderBase]: For 60557/60894 co-relation queries the response was YES. [2024-11-07 19:31:45,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31684 conditions, 7008 events. 3698/7008 cut-off events. For 60557/60894 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 49792 event pairs, 390 based on Foata normal form. 6/6906 useless extension candidates. Maximal degree in co-relation 31151. Up to 1346 conditions per place. [2024-11-07 19:31:45,131 INFO L140 encePairwiseOnDemand]: 51/66 looper letters, 292 selfloop transitions, 118 changer transitions 26/459 dead transitions. [2024-11-07 19:31:45,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 459 transitions, 6438 flow [2024-11-07 19:31:45,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-07 19:31:45,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-07 19:31:45,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 632 transitions. [2024-11-07 19:31:45,132 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6383838383838384 [2024-11-07 19:31:45,132 INFO L175 Difference]: Start difference. First operand has 192 places, 192 transitions, 2494 flow. Second operand 15 states and 632 transitions. [2024-11-07 19:31:45,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 459 transitions, 6438 flow [2024-11-07 19:31:45,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 459 transitions, 6230 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-11-07 19:31:45,187 INFO L231 Difference]: Finished difference. Result has 204 places, 241 transitions, 3532 flow [2024-11-07 19:31:45,187 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2390, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3532, PETRI_PLACES=204, PETRI_TRANSITIONS=241} [2024-11-07 19:31:45,188 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 142 predicate places. [2024-11-07 19:31:45,188 INFO L471 AbstractCegarLoop]: Abstraction has has 204 places, 241 transitions, 3532 flow [2024-11-07 19:31:45,188 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 33.2) internal successors, (332), 10 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:45,188 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:45,188 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:45,200 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-07 19:31:45,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-07 19:31:45,389 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:31:45,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:45,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1842144305, now seen corresponding path program 5 times [2024-11-07 19:31:45,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:45,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647596524] [2024-11-07 19:31:45,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:45,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:45,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:45,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:45,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647596524] [2024-11-07 19:31:45,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647596524] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:45,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075019191] [2024-11-07 19:31:45,551 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-07 19:31:45,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:45,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:31:45,554 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:31:45,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-07 19:31:45,638 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:31:45,638 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:31:45,639 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-07 19:31:45,640 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:31:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:45,846 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:31:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:46,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075019191] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:46,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-07 19:31:46,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 23 [2024-11-07 19:31:46,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972967111] [2024-11-07 19:31:46,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:31:46,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-07 19:31:46,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:46,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-07 19:31:46,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2024-11-07 19:31:46,375 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-07 19:31:46,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 241 transitions, 3532 flow. Second operand has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:46,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:46,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-07 19:31:46,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:47,333 INFO L124 PetriNetUnfolderBase]: 3329/6403 cut-off events. [2024-11-07 19:31:47,333 INFO L125 PetriNetUnfolderBase]: For 68815/69307 co-relation queries the response was YES. [2024-11-07 19:31:47,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30981 conditions, 6403 events. 3329/6403 cut-off events. For 68815/69307 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 45909 event pairs, 984 based on Foata normal form. 78/6347 useless extension candidates. Maximal degree in co-relation 30863. Up to 3715 conditions per place. [2024-11-07 19:31:47,378 INFO L140 encePairwiseOnDemand]: 53/66 looper letters, 157 selfloop transitions, 83 changer transitions 30/296 dead transitions. [2024-11-07 19:31:47,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 296 transitions, 4497 flow [2024-11-07 19:31:47,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-07 19:31:47,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-07 19:31:47,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 508 transitions. [2024-11-07 19:31:47,380 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5920745920745921 [2024-11-07 19:31:47,380 INFO L175 Difference]: Start difference. First operand has 204 places, 241 transitions, 3532 flow. Second operand 13 states and 508 transitions. [2024-11-07 19:31:47,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 296 transitions, 4497 flow [2024-11-07 19:31:47,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 296 transitions, 4337 flow, removed 32 selfloop flow, removed 10 redundant places. [2024-11-07 19:31:47,474 INFO L231 Difference]: Finished difference. Result has 206 places, 228 transitions, 3336 flow [2024-11-07 19:31:47,474 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3382, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3336, PETRI_PLACES=206, PETRI_TRANSITIONS=228} [2024-11-07 19:31:47,474 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 144 predicate places. [2024-11-07 19:31:47,474 INFO L471 AbstractCegarLoop]: Abstraction has has 206 places, 228 transitions, 3336 flow [2024-11-07 19:31:47,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:47,475 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:47,475 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:47,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-07 19:31:47,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:47,675 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:31:47,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:47,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1936349030, now seen corresponding path program 1 times [2024-11-07 19:31:47,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:47,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080601148] [2024-11-07 19:31:47,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:47,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:47,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:47,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:47,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:47,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080601148] [2024-11-07 19:31:47,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080601148] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:47,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725308199] [2024-11-07 19:31:47,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:47,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:47,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:31:47,837 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:31:47,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-07 19:31:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:47,911 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-07 19:31:47,912 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:31:48,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:48,133 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:31:48,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:48,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725308199] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:48,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-07 19:31:48,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 26 [2024-11-07 19:31:48,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678244881] [2024-11-07 19:31:48,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:31:48,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-07 19:31:48,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:48,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-07 19:31:48,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2024-11-07 19:31:48,644 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-07 19:31:48,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 228 transitions, 3336 flow. Second operand has 10 states, 10 states have (on average 34.2) internal successors, (342), 10 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:48,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:48,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-07 19:31:48,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:49,611 INFO L124 PetriNetUnfolderBase]: 3409/6575 cut-off events. [2024-11-07 19:31:49,611 INFO L125 PetriNetUnfolderBase]: For 66252/66718 co-relation queries the response was YES. [2024-11-07 19:31:49,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31066 conditions, 6575 events. 3409/6575 cut-off events. For 66252/66718 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 47727 event pairs, 956 based on Foata normal form. 58/6492 useless extension candidates. Maximal degree in co-relation 30936. Up to 3590 conditions per place. [2024-11-07 19:31:49,646 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 196 selfloop transitions, 93 changer transitions 12/327 dead transitions. [2024-11-07 19:31:49,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 327 transitions, 4757 flow [2024-11-07 19:31:49,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-07 19:31:49,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-07 19:31:49,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 536 transitions. [2024-11-07 19:31:49,647 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6247086247086248 [2024-11-07 19:31:49,647 INFO L175 Difference]: Start difference. First operand has 206 places, 228 transitions, 3336 flow. Second operand 13 states and 536 transitions. [2024-11-07 19:31:49,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 327 transitions, 4757 flow [2024-11-07 19:31:49,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 327 transitions, 4538 flow, removed 18 selfloop flow, removed 12 redundant places. [2024-11-07 19:31:49,722 INFO L231 Difference]: Finished difference. Result has 207 places, 237 transitions, 3467 flow [2024-11-07 19:31:49,722 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3139, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3467, PETRI_PLACES=207, PETRI_TRANSITIONS=237} [2024-11-07 19:31:49,722 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 145 predicate places. [2024-11-07 19:31:49,722 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 237 transitions, 3467 flow [2024-11-07 19:31:49,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.2) internal successors, (342), 10 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:49,723 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:49,723 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:49,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-07 19:31:49,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:49,923 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:31:49,923 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:49,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1662315244, now seen corresponding path program 2 times [2024-11-07 19:31:49,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:49,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567494495] [2024-11-07 19:31:49,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:49,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:49,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:50,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:50,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:50,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567494495] [2024-11-07 19:31:50,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567494495] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:50,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7583886] [2024-11-07 19:31:50,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:31:50,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:50,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:31:50,086 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:31:50,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-07 19:31:50,166 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-07 19:31:50,167 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:31:50,167 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-07 19:31:50,168 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:31:50,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:31:50,375 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-07 19:31:50,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7583886] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:31:50,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-07 19:31:50,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2024-11-07 19:31:50,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782830853] [2024-11-07 19:31:50,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:31:50,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-07 19:31:50,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:50,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-07 19:31:50,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-11-07 19:31:50,392 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-07 19:31:50,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 237 transitions, 3467 flow. Second operand has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:50,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:50,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-07 19:31:50,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:51,210 INFO L124 PetriNetUnfolderBase]: 3367/6507 cut-off events. [2024-11-07 19:31:51,210 INFO L125 PetriNetUnfolderBase]: For 65383/65839 co-relation queries the response was YES. [2024-11-07 19:31:51,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30910 conditions, 6507 events. 3367/6507 cut-off events. For 65383/65839 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 47373 event pairs, 998 based on Foata normal form. 58/6419 useless extension candidates. Maximal degree in co-relation 30777. Up to 3933 conditions per place. [2024-11-07 19:31:51,260 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 184 selfloop transitions, 72 changer transitions 15/297 dead transitions. [2024-11-07 19:31:51,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 297 transitions, 4578 flow [2024-11-07 19:31:51,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:31:51,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:31:51,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 373 transitions. [2024-11-07 19:31:51,261 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6279461279461279 [2024-11-07 19:31:51,261 INFO L175 Difference]: Start difference. First operand has 207 places, 237 transitions, 3467 flow. Second operand 9 states and 373 transitions. [2024-11-07 19:31:51,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 297 transitions, 4578 flow [2024-11-07 19:31:51,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 297 transitions, 4471 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-11-07 19:31:51,370 INFO L231 Difference]: Finished difference. Result has 211 places, 239 transitions, 3552 flow [2024-11-07 19:31:51,370 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3370, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3552, PETRI_PLACES=211, PETRI_TRANSITIONS=239} [2024-11-07 19:31:51,371 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 149 predicate places. [2024-11-07 19:31:51,371 INFO L471 AbstractCegarLoop]: Abstraction has has 211 places, 239 transitions, 3552 flow [2024-11-07 19:31:51,371 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:51,371 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:51,371 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:51,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-07 19:31:51,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:51,572 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:31:51,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:51,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1395325048, now seen corresponding path program 3 times [2024-11-07 19:31:51,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:51,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775844990] [2024-11-07 19:31:51,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:51,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:51,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:51,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:51,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775844990] [2024-11-07 19:31:51,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775844990] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:51,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279104577] [2024-11-07 19:31:51,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-07 19:31:51,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:51,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:31:51,757 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:31:51,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-07 19:31:51,828 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-07 19:31:51,828 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:31:51,829 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-07 19:31:51,830 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:31:52,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:31:52,013 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-07 19:31:52,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279104577] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:31:52,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-07 19:31:52,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2024-11-07 19:31:52,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126311439] [2024-11-07 19:31:52,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:31:52,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-07 19:31:52,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:52,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-07 19:31:52,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2024-11-07 19:31:52,034 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-07 19:31:52,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 239 transitions, 3552 flow. Second operand has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:52,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:52,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-07 19:31:52,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:52,779 INFO L124 PetriNetUnfolderBase]: 3315/6399 cut-off events. [2024-11-07 19:31:52,779 INFO L125 PetriNetUnfolderBase]: For 68286/68742 co-relation queries the response was YES. [2024-11-07 19:31:52,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31023 conditions, 6399 events. 3315/6399 cut-off events. For 68286/68742 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 46483 event pairs, 985 based on Foata normal form. 58/6311 useless extension candidates. Maximal degree in co-relation 30898. Up to 3839 conditions per place. [2024-11-07 19:31:52,811 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 173 selfloop transitions, 69 changer transitions 26/294 dead transitions. [2024-11-07 19:31:52,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 294 transitions, 4570 flow [2024-11-07 19:31:52,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:31:52,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:31:52,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 374 transitions. [2024-11-07 19:31:52,812 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6296296296296297 [2024-11-07 19:31:52,812 INFO L175 Difference]: Start difference. First operand has 211 places, 239 transitions, 3552 flow. Second operand 9 states and 374 transitions. [2024-11-07 19:31:52,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 294 transitions, 4570 flow [2024-11-07 19:31:52,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 294 transitions, 4430 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-07 19:31:52,888 INFO L231 Difference]: Finished difference. Result has 213 places, 234 transitions, 3469 flow [2024-11-07 19:31:52,888 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3412, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3469, PETRI_PLACES=213, PETRI_TRANSITIONS=234} [2024-11-07 19:31:52,888 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 151 predicate places. [2024-11-07 19:31:52,888 INFO L471 AbstractCegarLoop]: Abstraction has has 213 places, 234 transitions, 3469 flow [2024-11-07 19:31:52,888 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:52,888 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:52,888 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:52,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-11-07 19:31:53,089 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:53,089 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:31:53,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:53,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1895600528, now seen corresponding path program 4 times [2024-11-07 19:31:53,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:53,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542053758] [2024-11-07 19:31:53,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:53,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:53,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:53,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:53,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542053758] [2024-11-07 19:31:53,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542053758] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:53,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054260136] [2024-11-07 19:31:53,228 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-07 19:31:53,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:53,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:31:53,230 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:31:53,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-07 19:31:53,296 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-07 19:31:53,296 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:31:53,297 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-07 19:31:53,298 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:31:53,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:53,495 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:31:53,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:53,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054260136] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:53,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-07 19:31:53,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 26 [2024-11-07 19:31:53,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810038790] [2024-11-07 19:31:53,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:31:53,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-07 19:31:53,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:53,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-07 19:31:53,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2024-11-07 19:31:53,796 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-07 19:31:53,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 234 transitions, 3469 flow. Second operand has 10 states, 10 states have (on average 34.2) internal successors, (342), 10 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:53,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:53,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-07 19:31:53,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:54,632 INFO L124 PetriNetUnfolderBase]: 3227/6221 cut-off events. [2024-11-07 19:31:54,632 INFO L125 PetriNetUnfolderBase]: For 66824/67290 co-relation queries the response was YES. [2024-11-07 19:31:54,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30193 conditions, 6221 events. 3227/6221 cut-off events. For 66824/67290 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 44782 event pairs, 944 based on Foata normal form. 58/6138 useless extension candidates. Maximal degree in co-relation 30077. Up to 3590 conditions per place. [2024-11-07 19:31:54,663 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 156 selfloop transitions, 87 changer transitions 21/290 dead transitions. [2024-11-07 19:31:54,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 290 transitions, 4354 flow [2024-11-07 19:31:54,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-07 19:31:54,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-07 19:31:54,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 480 transitions. [2024-11-07 19:31:54,664 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-11-07 19:31:54,664 INFO L175 Difference]: Start difference. First operand has 213 places, 234 transitions, 3469 flow. Second operand 12 states and 480 transitions. [2024-11-07 19:31:54,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 290 transitions, 4354 flow [2024-11-07 19:31:54,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 290 transitions, 4207 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-11-07 19:31:54,736 INFO L231 Difference]: Finished difference. Result has 213 places, 228 transitions, 3418 flow [2024-11-07 19:31:54,736 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3324, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3418, PETRI_PLACES=213, PETRI_TRANSITIONS=228} [2024-11-07 19:31:54,737 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 151 predicate places. [2024-11-07 19:31:54,737 INFO L471 AbstractCegarLoop]: Abstraction has has 213 places, 228 transitions, 3418 flow [2024-11-07 19:31:54,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.2) internal successors, (342), 10 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:54,737 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:54,737 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:54,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-07 19:31:54,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-07 19:31:54,938 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:31:54,938 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:54,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1755724260, now seen corresponding path program 5 times [2024-11-07 19:31:54,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:54,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152225692] [2024-11-07 19:31:54,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:54,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:54,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:55,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:55,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:55,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152225692] [2024-11-07 19:31:55,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152225692] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:55,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026524113] [2024-11-07 19:31:55,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-07 19:31:55,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:55,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:31:55,108 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:31:55,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-07 19:31:55,176 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:31:55,176 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:31:55,177 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-07 19:31:55,178 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:31:55,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:55,381 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:31:55,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:55,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026524113] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:55,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-07 19:31:55,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 26 [2024-11-07 19:31:55,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683958190] [2024-11-07 19:31:55,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:31:55,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-07 19:31:55,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:55,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-07 19:31:55,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2024-11-07 19:31:55,917 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-07 19:31:55,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 228 transitions, 3418 flow. Second operand has 10 states, 10 states have (on average 34.2) internal successors, (342), 10 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:55,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:55,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-07 19:31:55,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:56,817 INFO L124 PetriNetUnfolderBase]: 3199/6109 cut-off events. [2024-11-07 19:31:56,818 INFO L125 PetriNetUnfolderBase]: For 66587/67073 co-relation queries the response was YES. [2024-11-07 19:31:56,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29805 conditions, 6109 events. 3199/6109 cut-off events. For 66587/67073 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 44060 event pairs, 930 based on Foata normal form. 70/6042 useless extension candidates. Maximal degree in co-relation 29690. Up to 3608 conditions per place. [2024-11-07 19:31:56,851 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 145 selfloop transitions, 83 changer transitions 26/280 dead transitions. [2024-11-07 19:31:56,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 280 transitions, 4305 flow [2024-11-07 19:31:56,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-07 19:31:56,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-07 19:31:56,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 472 transitions. [2024-11-07 19:31:56,852 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5959595959595959 [2024-11-07 19:31:56,852 INFO L175 Difference]: Start difference. First operand has 213 places, 228 transitions, 3418 flow. Second operand 12 states and 472 transitions. [2024-11-07 19:31:56,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 280 transitions, 4305 flow [2024-11-07 19:31:56,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 280 transitions, 4227 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-11-07 19:31:56,926 INFO L231 Difference]: Finished difference. Result has 212 places, 221 transitions, 3423 flow [2024-11-07 19:31:56,926 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3350, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3423, PETRI_PLACES=212, PETRI_TRANSITIONS=221} [2024-11-07 19:31:56,926 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 150 predicate places. [2024-11-07 19:31:56,926 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 221 transitions, 3423 flow [2024-11-07 19:31:56,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.2) internal successors, (342), 10 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:56,926 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:56,926 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:56,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-07 19:31:57,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-07 19:31:57,127 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:31:57,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:57,127 INFO L85 PathProgramCache]: Analyzing trace with hash -330388147, now seen corresponding path program 6 times [2024-11-07 19:31:57,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:57,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165440837] [2024-11-07 19:31:57,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:57,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:57,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:57,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:57,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165440837] [2024-11-07 19:31:57,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165440837] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:57,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078227345] [2024-11-07 19:31:57,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-07 19:31:57,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:57,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:31:57,241 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:31:57,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-07 19:31:57,307 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-07 19:31:57,307 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:31:57,308 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-07 19:31:57,309 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:31:57,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:31:57,463 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-07 19:31:57,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078227345] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:31:57,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-07 19:31:57,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2024-11-07 19:31:57,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386285400] [2024-11-07 19:31:57,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:31:57,463 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-07 19:31:57,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:57,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-07 19:31:57,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2024-11-07 19:31:57,485 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-07 19:31:57,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 221 transitions, 3423 flow. Second operand has 8 states, 8 states have (on average 34.75) internal successors, (278), 8 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 19:31:57,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:57,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-07 19:31:57,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:58,096 INFO L124 PetriNetUnfolderBase]: 3093/5953 cut-off events. [2024-11-07 19:31:58,096 INFO L125 PetriNetUnfolderBase]: For 68455/68923 co-relation queries the response was YES. [2024-11-07 19:31:58,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29364 conditions, 5953 events. 3093/5953 cut-off events. For 68455/68923 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 42827 event pairs, 935 based on Foata normal form. 70/5886 useless extension candidates. Maximal degree in co-relation 29259. Up to 3591 conditions per place. [2024-11-07 19:31:58,132 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 140 selfloop transitions, 54 changer transitions 34/254 dead transitions. [2024-11-07 19:31:58,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 254 transitions, 4098 flow [2024-11-07 19:31:58,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:31:58,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:31:58,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 365 transitions. [2024-11-07 19:31:58,133 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6144781144781145 [2024-11-07 19:31:58,133 INFO L175 Difference]: Start difference. First operand has 212 places, 221 transitions, 3423 flow. Second operand 9 states and 365 transitions. [2024-11-07 19:31:58,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 254 transitions, 4098 flow [2024-11-07 19:31:58,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 254 transitions, 3973 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-11-07 19:31:58,285 INFO L231 Difference]: Finished difference. Result has 207 places, 202 transitions, 3189 flow [2024-11-07 19:31:58,286 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=3298, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3189, PETRI_PLACES=207, PETRI_TRANSITIONS=202} [2024-11-07 19:31:58,286 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 145 predicate places. [2024-11-07 19:31:58,286 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 202 transitions, 3189 flow [2024-11-07 19:31:58,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 34.75) internal successors, (278), 8 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 19:31:58,286 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:58,286 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:58,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-07 19:31:58,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-07 19:31:58,487 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:31:58,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:58,487 INFO L85 PathProgramCache]: Analyzing trace with hash -970505722, now seen corresponding path program 6 times [2024-11-07 19:31:58,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:58,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411064742] [2024-11-07 19:31:58,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:58,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:58,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:31:58,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:31:58,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:31:58,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411064742] [2024-11-07 19:31:58,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411064742] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:31:58,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052867472] [2024-11-07 19:31:58,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-07 19:31:58,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:31:58,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:31:58,672 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:31:58,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-07 19:31:58,742 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-11-07 19:31:58,742 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:31:58,743 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-07 19:31:58,744 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:31:58,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:31:58,947 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-07 19:31:58,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052867472] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:31:58,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-07 19:31:58,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [10] total 17 [2024-11-07 19:31:58,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173616696] [2024-11-07 19:31:58,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:31:58,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-07 19:31:58,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:31:58,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-07 19:31:58,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2024-11-07 19:31:58,971 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-07 19:31:58,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 202 transitions, 3189 flow. Second operand has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:58,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:31:58,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-07 19:31:58,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:31:59,614 INFO L124 PetriNetUnfolderBase]: 3058/5792 cut-off events. [2024-11-07 19:31:59,615 INFO L125 PetriNetUnfolderBase]: For 68081/68569 co-relation queries the response was YES. [2024-11-07 19:31:59,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29848 conditions, 5792 events. 3058/5792 cut-off events. For 68081/68569 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 41419 event pairs, 902 based on Foata normal form. 58/5709 useless extension candidates. Maximal degree in co-relation 29688. Up to 3507 conditions per place. [2024-11-07 19:31:59,651 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 127 selfloop transitions, 55 changer transitions 28/236 dead transitions. [2024-11-07 19:31:59,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 236 transitions, 3830 flow [2024-11-07 19:31:59,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:31:59,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:31:59,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 361 transitions. [2024-11-07 19:31:59,652 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6077441077441077 [2024-11-07 19:31:59,652 INFO L175 Difference]: Start difference. First operand has 207 places, 202 transitions, 3189 flow. Second operand 9 states and 361 transitions. [2024-11-07 19:31:59,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 236 transitions, 3830 flow [2024-11-07 19:31:59,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 236 transitions, 3456 flow, removed 41 selfloop flow, removed 17 redundant places. [2024-11-07 19:31:59,740 INFO L231 Difference]: Finished difference. Result has 183 places, 190 transitions, 2774 flow [2024-11-07 19:31:59,741 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2825, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2774, PETRI_PLACES=183, PETRI_TRANSITIONS=190} [2024-11-07 19:31:59,741 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 121 predicate places. [2024-11-07 19:31:59,741 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 190 transitions, 2774 flow [2024-11-07 19:31:59,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.44444444444444) internal successors, (310), 9 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:31:59,741 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:31:59,741 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:31:59,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-07 19:31:59,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-07 19:31:59,942 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:31:59,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:31:59,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1006245536, now seen corresponding path program 3 times [2024-11-07 19:31:59,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:31:59,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108443532] [2024-11-07 19:31:59,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:31:59,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:31:59,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:00,006 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:32:00,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:32:00,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108443532] [2024-11-07 19:32:00,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108443532] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:32:00,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328217] [2024-11-07 19:32:00,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-07 19:32:00,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:32:00,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:32:00,008 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:32:00,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-07 19:32:00,078 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-07 19:32:00,078 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:32:00,079 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-07 19:32:00,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:32:00,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-07 19:32:00,120 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-07 19:32:00,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2024-11-07 19:32:00,128 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-07 19:32:00,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-07 19:32:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-07 19:32:00,205 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:32:00,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2024-11-07 19:32:00,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-07 19:32:00,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328217] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:32:00,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:32:00,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 21 [2024-11-07 19:32:00,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399879961] [2024-11-07 19:32:00,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:32:00,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-07 19:32:00,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:32:00,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-07 19:32:00,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2024-11-07 19:32:01,290 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-07 19:32:01,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 190 transitions, 2774 flow. Second operand has 22 states, 22 states have (on average 26.545454545454547) internal successors, (584), 22 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:32:01,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:32:01,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-07 19:32:01,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:32:02,941 INFO L124 PetriNetUnfolderBase]: 6790/12213 cut-off events. [2024-11-07 19:32:02,942 INFO L125 PetriNetUnfolderBase]: For 112532/112552 co-relation queries the response was YES. [2024-11-07 19:32:02,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59755 conditions, 12213 events. 6790/12213 cut-off events. For 112532/112552 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 88664 event pairs, 2308 based on Foata normal form. 80/12265 useless extension candidates. Maximal degree in co-relation 59640. Up to 2993 conditions per place. [2024-11-07 19:32:03,027 INFO L140 encePairwiseOnDemand]: 54/66 looper letters, 429 selfloop transitions, 100 changer transitions 0/542 dead transitions. [2024-11-07 19:32:03,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 542 transitions, 8407 flow [2024-11-07 19:32:03,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-07 19:32:03,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-07 19:32:03,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 673 transitions. [2024-11-07 19:32:03,028 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5098484848484849 [2024-11-07 19:32:03,028 INFO L175 Difference]: Start difference. First operand has 183 places, 190 transitions, 2774 flow. Second operand 20 states and 673 transitions. [2024-11-07 19:32:03,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 542 transitions, 8407 flow [2024-11-07 19:32:03,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 542 transitions, 7863 flow, removed 77 selfloop flow, removed 9 redundant places. [2024-11-07 19:32:03,245 INFO L231 Difference]: Finished difference. Result has 181 places, 227 transitions, 3452 flow [2024-11-07 19:32:03,245 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2552, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3452, PETRI_PLACES=181, PETRI_TRANSITIONS=227} [2024-11-07 19:32:03,246 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 119 predicate places. [2024-11-07 19:32:03,246 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 227 transitions, 3452 flow [2024-11-07 19:32:03,246 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 26.545454545454547) internal successors, (584), 22 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:32:03,246 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:32:03,246 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:32:03,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-07 19:32:03,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-07 19:32:03,446 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:32:03,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:32:03,447 INFO L85 PathProgramCache]: Analyzing trace with hash 1381627071, now seen corresponding path program 1 times [2024-11-07 19:32:03,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:32:03,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945531188] [2024-11-07 19:32:03,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:32:03,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:32:03,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:03,520 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 19:32:03,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:32:03,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945531188] [2024-11-07 19:32:03,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945531188] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:32:03,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465552526] [2024-11-07 19:32:03,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:32:03,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:32:03,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:32:03,522 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:32:03,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-07 19:32:03,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:03,594 INFO L255 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-07 19:32:03,595 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:32:03,669 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 19:32:03,669 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:32:03,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:32:03,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465552526] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-07 19:32:03,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-07 19:32:03,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 6] total 14 [2024-11-07 19:32:03,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517247969] [2024-11-07 19:32:03,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:32:03,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-07 19:32:03,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:32:03,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-07 19:32:03,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2024-11-07 19:32:03,767 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-07 19:32:03,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 227 transitions, 3452 flow. Second operand has 7 states, 7 states have (on average 34.42857142857143) internal successors, (241), 7 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:32:03,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:32:03,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-07 19:32:03,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:32:04,596 INFO L124 PetriNetUnfolderBase]: 4865/9807 cut-off events. [2024-11-07 19:32:04,596 INFO L125 PetriNetUnfolderBase]: For 91225/91827 co-relation queries the response was YES. [2024-11-07 19:32:04,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45580 conditions, 9807 events. 4865/9807 cut-off events. For 91225/91827 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 78958 event pairs, 1794 based on Foata normal form. 276/10020 useless extension candidates. Maximal degree in co-relation 41697. Up to 4456 conditions per place. [2024-11-07 19:32:04,657 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 232 selfloop transitions, 30 changer transitions 0/287 dead transitions. [2024-11-07 19:32:04,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 287 transitions, 5014 flow [2024-11-07 19:32:04,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-07 19:32:04,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-07 19:32:04,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 263 transitions. [2024-11-07 19:32:04,659 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5692640692640693 [2024-11-07 19:32:04,659 INFO L175 Difference]: Start difference. First operand has 181 places, 227 transitions, 3452 flow. Second operand 7 states and 263 transitions. [2024-11-07 19:32:04,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 287 transitions, 5014 flow [2024-11-07 19:32:04,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 287 transitions, 4822 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-11-07 19:32:04,772 INFO L231 Difference]: Finished difference. Result has 182 places, 209 transitions, 3011 flow [2024-11-07 19:32:04,773 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2888, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3011, PETRI_PLACES=182, PETRI_TRANSITIONS=209} [2024-11-07 19:32:04,773 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 120 predicate places. [2024-11-07 19:32:04,773 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 209 transitions, 3011 flow [2024-11-07 19:32:04,773 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 34.42857142857143) internal successors, (241), 7 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:32:04,773 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:32:04,773 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:32:04,785 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-07 19:32:04,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-07 19:32:04,974 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:32:04,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:32:04,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1821426884, now seen corresponding path program 2 times [2024-11-07 19:32:04,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:32:04,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532865020] [2024-11-07 19:32:04,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:32:04,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:32:04,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:05,039 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:32:05,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:32:05,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532865020] [2024-11-07 19:32:05,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532865020] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:32:05,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753803939] [2024-11-07 19:32:05,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:32:05,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:32:05,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:32:05,042 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:32:05,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-07 19:32:05,110 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-07 19:32:05,110 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:32:05,111 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-07 19:32:05,112 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:32:05,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-07 19:32:05,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-07 19:32:05,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-07 19:32:05,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-07 19:32:05,193 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-07 19:32:05,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-07 19:32:05,462 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-07 19:32:05,462 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:32:05,792 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-07 19:32:05,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753803939] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:32:05,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:32:05,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 19 [2024-11-07 19:32:05,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961667010] [2024-11-07 19:32:05,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:32:05,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-07 19:32:05,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:32:05,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-07 19:32:05,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2024-11-07 19:32:06,758 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-07 19:32:06,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 209 transitions, 3011 flow. Second operand has 19 states, 19 states have (on average 27.31578947368421) internal successors, (519), 19 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:32:06,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:32:06,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-07 19:32:06,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:32:09,069 INFO L124 PetriNetUnfolderBase]: 10479/17847 cut-off events. [2024-11-07 19:32:09,069 INFO L125 PetriNetUnfolderBase]: For 196127/197728 co-relation queries the response was YES. [2024-11-07 19:32:09,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90510 conditions, 17847 events. 10479/17847 cut-off events. For 196127/197728 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 135116 event pairs, 2220 based on Foata normal form. 384/18183 useless extension candidates. Maximal degree in co-relation 76531. Up to 3862 conditions per place. [2024-11-07 19:32:09,161 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 570 selfloop transitions, 82 changer transitions 0/669 dead transitions. [2024-11-07 19:32:09,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 669 transitions, 11818 flow [2024-11-07 19:32:09,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-07 19:32:09,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-07 19:32:09,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 571 transitions. [2024-11-07 19:32:09,163 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5089126559714795 [2024-11-07 19:32:09,163 INFO L175 Difference]: Start difference. First operand has 182 places, 209 transitions, 3011 flow. Second operand 17 states and 571 transitions. [2024-11-07 19:32:09,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 669 transitions, 11818 flow [2024-11-07 19:32:09,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 669 transitions, 11706 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-11-07 19:32:09,390 INFO L231 Difference]: Finished difference. Result has 195 places, 243 transitions, 3760 flow [2024-11-07 19:32:09,390 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=2930, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3760, PETRI_PLACES=195, PETRI_TRANSITIONS=243} [2024-11-07 19:32:09,390 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 133 predicate places. [2024-11-07 19:32:09,390 INFO L471 AbstractCegarLoop]: Abstraction has has 195 places, 243 transitions, 3760 flow [2024-11-07 19:32:09,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 27.31578947368421) internal successors, (519), 19 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:32:09,391 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:32:09,391 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:32:09,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-11-07 19:32:09,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-07 19:32:09,591 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-07 19:32:09,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:32:09,591 INFO L85 PathProgramCache]: Analyzing trace with hash 456846371, now seen corresponding path program 2 times [2024-11-07 19:32:09,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:32:09,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529785864] [2024-11-07 19:32:09,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:32:09,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:32:09,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:09,679 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-07 19:32:09,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:32:09,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529785864] [2024-11-07 19:32:09,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529785864] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:32:09,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60770020] [2024-11-07 19:32:09,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:32:09,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:32:09,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:32:09,682 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:32:09,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-07 19:32:09,753 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-07 19:32:09,753 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:32:09,754 INFO L255 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-07 19:32:09,755 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:32:09,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-07 19:32:09,985 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-07 19:32:09,985 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:32:10,294 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-07 19:32:10,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60770020] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:32:10,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:32:10,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 19 [2024-11-07 19:32:10,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286143702] [2024-11-07 19:32:10,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:32:10,295 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-07 19:32:10,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:32:10,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-07 19:32:10,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2024-11-07 19:32:11,101 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-07 19:32:11,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 243 transitions, 3760 flow. Second operand has 19 states, 19 states have (on average 29.0) internal successors, (551), 19 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:32:11,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:32:11,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-07 19:32:11,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand