./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-chromosome-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-chromosome-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', '23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa'] 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-chromosome-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 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-07 19:28:52,254 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-07 19:28:52,350 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-07 19:28:52,355 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-07 19:28:52,355 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-07 19:28:52,375 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-07 19:28:52,377 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-07 19:28:52,378 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-07 19:28:52,378 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-07 19:28:52,378 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-07 19:28:52,379 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-07 19:28:52,379 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-07 19:28:52,379 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-07 19:28:52,380 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-07 19:28:52,380 INFO L153 SettingsManager]: * Use SBE=true [2024-11-07 19:28:52,380 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-07 19:28:52,380 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-07 19:28:52,380 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-07 19:28:52,380 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-07 19:28:52,380 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-07 19:28:52,381 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-07 19:28:52,381 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-07 19:28:52,381 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-07 19:28:52,381 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-07 19:28:52,381 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-07 19:28:52,381 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-07 19:28:52,381 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-07 19:28:52,381 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-07 19:28:52,381 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-07 19:28:52,381 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-07 19:28:52,381 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-07 19:28:52,381 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-07 19:28:52,381 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-07 19:28:52,381 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:28:52,381 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-07 19:28:52,381 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-07 19:28:52,381 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-07 19:28:52,381 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-07 19:28:52,381 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-07 19:28:52,381 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-07 19:28:52,381 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-07 19:28:52,382 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-07 19:28:52,382 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 -> 23ca06a4d1d66eab783b29fc3ce31114eee62eb7d17a2452b84e2d73b8d92cfa [2024-11-07 19:28:52,687 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-07 19:28:52,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-07 19:28:52,696 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-07 19:28:52,697 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-07 19:28:52,697 INFO L274 PluginConnector]: CDTParser initialized [2024-11-07 19:28:52,698 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2024-11-07 19:28:53,788 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-07 19:28:53,989 INFO L384 CDTParser]: Found 1 translation units. [2024-11-07 19:28:53,990 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-symm.wvr.c [2024-11-07 19:28:53,998 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c83ab7d03/bff0489a702b402fb83e2c011a67c323/FLAG9fe51e119 [2024-11-07 19:28:54,342 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/c83ab7d03/bff0489a702b402fb83e2c011a67c323 [2024-11-07 19:28:54,344 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-07 19:28:54,346 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-07 19:28:54,349 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-07 19:28:54,349 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-07 19:28:54,352 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-07 19:28:54,352 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:28:54" (1/1) ... [2024-11-07 19:28:54,354 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bbf08fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:54, skipping insertion in model container [2024-11-07 19:28:54,355 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:28:54" (1/1) ... [2024-11-07 19:28:54,368 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-07 19:28:54,502 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 19:28:54,508 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:28:54,519 INFO L200 MainTranslator]: Completed pre-run [2024-11-07 19:28:54,544 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:28:54,557 INFO L204 MainTranslator]: Completed translation [2024-11-07 19:28:54,557 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:54 WrapperNode [2024-11-07 19:28:54,558 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-07 19:28:54,558 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-07 19:28:54,559 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-07 19:28:54,559 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-07 19:28:54,564 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:54" (1/1) ... [2024-11-07 19:28:54,571 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:54" (1/1) ... [2024-11-07 19:28:54,595 INFO L138 Inliner]: procedures = 24, calls = 28, calls flagged for inlining = 16, calls inlined = 20, statements flattened = 193 [2024-11-07 19:28:54,598 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-07 19:28:54,599 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-07 19:28:54,599 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-07 19:28:54,599 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-07 19:28:54,606 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:54" (1/1) ... [2024-11-07 19:28:54,606 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:54" (1/1) ... [2024-11-07 19:28:54,608 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:54" (1/1) ... [2024-11-07 19:28:54,622 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-07 19:28:54,622 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:54" (1/1) ... [2024-11-07 19:28:54,622 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:54" (1/1) ... [2024-11-07 19:28:54,630 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:54" (1/1) ... [2024-11-07 19:28:54,632 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:54" (1/1) ... [2024-11-07 19:28:54,634 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:54" (1/1) ... [2024-11-07 19:28:54,634 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:54" (1/1) ... [2024-11-07 19:28:54,636 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-07 19:28:54,637 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-07 19:28:54,637 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-07 19:28:54,637 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-07 19:28:54,638 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:54" (1/1) ... [2024-11-07 19:28:54,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:28:54,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:28:54,666 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 19:28:54,671 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 19:28:54,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-07 19:28:54,686 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-07 19:28:54,686 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-07 19:28:54,686 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-07 19:28:54,687 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-07 19:28:54,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-07 19:28:54,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-07 19:28:54,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-07 19:28:54,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-07 19:28:54,687 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-07 19:28:54,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-07 19:28:54,687 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-07 19:28:54,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-07 19:28:54,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-07 19:28:54,688 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 19:28:54,772 INFO L238 CfgBuilder]: Building ICFG [2024-11-07 19:28:54,773 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-07 19:28:55,126 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-07 19:28:55,126 INFO L287 CfgBuilder]: Performing block encoding [2024-11-07 19:28:55,350 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-07 19:28:55,351 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-07 19:28:55,351 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:28:55 BoogieIcfgContainer [2024-11-07 19:28:55,352 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-07 19:28:55,353 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-07 19:28:55,353 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-07 19:28:55,373 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-07 19:28:55,374 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:28:54" (1/3) ... [2024-11-07 19:28:55,374 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5322c55a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:28:55, skipping insertion in model container [2024-11-07 19:28:55,374 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:28:54" (2/3) ... [2024-11-07 19:28:55,374 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5322c55a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:28:55, skipping insertion in model container [2024-11-07 19:28:55,374 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:28:55" (3/3) ... [2024-11-07 19:28:55,375 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-symm.wvr.c [2024-11-07 19:28:55,388 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-07 19:28:55,388 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-11-07 19:28:55,388 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-07 19:28:55,432 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-07 19:28:55,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 45 places, 42 transitions, 98 flow [2024-11-07 19:28:55,478 INFO L124 PetriNetUnfolderBase]: 4/40 cut-off events. [2024-11-07 19:28:55,480 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-07 19:28:55,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 40 events. 4/40 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 80 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-11-07 19:28:55,483 INFO L82 GeneralOperation]: Start removeDead. Operand has 45 places, 42 transitions, 98 flow [2024-11-07 19:28:55,485 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 39 transitions, 90 flow [2024-11-07 19:28:55,494 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 19:28:55,505 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;@1f56534e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 19:28:55,505 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2024-11-07 19:28:55,509 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 19:28:55,509 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-07 19:28:55,509 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 19:28:55,510 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:28:55,510 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:28:55,510 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-07 19:28:55,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:28:55,514 INFO L85 PathProgramCache]: Analyzing trace with hash 664973, now seen corresponding path program 1 times [2024-11-07 19:28:55,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:28:55,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570990994] [2024-11-07 19:28:55,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:28:55,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:28:55,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:28:55,671 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 19:28:55,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:28:55,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570990994] [2024-11-07 19:28:55,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570990994] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:28:55,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:28:55,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-07 19:28:55,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010206993] [2024-11-07 19:28:55,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:28:55,678 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:28:55,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:28:55,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:28:55,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:28:55,717 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-11-07 19:28:55,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 19:28:55,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:28:55,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-11-07 19:28:55,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:28:55,789 INFO L124 PetriNetUnfolderBase]: 39/124 cut-off events. [2024-11-07 19:28:55,789 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-11-07 19:28:55,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 124 events. 39/124 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 488 event pairs, 22 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 168. Up to 68 conditions per place. [2024-11-07 19:28:55,792 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 18 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2024-11-07 19:28:55,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 35 transitions, 122 flow [2024-11-07 19:28:55,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:28:55,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:28:55,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-11-07 19:28:55,804 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-11-07 19:28:55,805 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 90 flow. Second operand 3 states and 77 transitions. [2024-11-07 19:28:55,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 35 transitions, 122 flow [2024-11-07 19:28:55,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 114 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-07 19:28:55,812 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 78 flow [2024-11-07 19:28:55,815 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2024-11-07 19:28:55,820 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, -6 predicate places. [2024-11-07 19:28:55,820 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 78 flow [2024-11-07 19:28:55,820 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 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 19:28:55,820 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:28:55,820 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:28:55,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-07 19:28:55,821 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-07 19:28:55,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:28:55,822 INFO L85 PathProgramCache]: Analyzing trace with hash 664974, now seen corresponding path program 1 times [2024-11-07 19:28:55,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:28:55,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510521960] [2024-11-07 19:28:55,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:28:55,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:28:55,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:28:55,984 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 19:28:55,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:28:55,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510521960] [2024-11-07 19:28:55,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510521960] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:28:55,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:28:55,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:28:55,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765826905] [2024-11-07 19:28:55,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:28:55,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:28:55,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:28:55,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:28:55,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:28:56,024 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-11-07 19:28:56,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 78 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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 19:28:56,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:28:56,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-11-07 19:28:56,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:28:56,106 INFO L124 PetriNetUnfolderBase]: 41/130 cut-off events. [2024-11-07 19:28:56,106 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-07 19:28:56,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221 conditions, 130 events. 41/130 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 507 event pairs, 22 based on Foata normal form. 0/98 useless extension candidates. Maximal degree in co-relation 185. Up to 77 conditions per place. [2024-11-07 19:28:56,107 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 23 selfloop transitions, 5 changer transitions 0/41 dead transitions. [2024-11-07 19:28:56,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 41 transitions, 148 flow [2024-11-07 19:28:56,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:28:56,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:28:56,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-11-07 19:28:56,108 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-07 19:28:56,108 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 78 flow. Second operand 3 states and 84 transitions. [2024-11-07 19:28:56,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 41 transitions, 148 flow [2024-11-07 19:28:56,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 41 transitions, 142 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:28:56,109 INFO L231 Difference]: Finished difference. Result has 38 places, 39 transitions, 114 flow [2024-11-07 19:28:56,109 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=38, PETRI_TRANSITIONS=39} [2024-11-07 19:28:56,110 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, -4 predicate places. [2024-11-07 19:28:56,110 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 39 transitions, 114 flow [2024-11-07 19:28:56,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 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 19:28:56,110 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:28:56,110 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-07 19:28:56,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-07 19:28:56,110 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-07 19:28:56,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:28:56,111 INFO L85 PathProgramCache]: Analyzing trace with hash 639061118, now seen corresponding path program 1 times [2024-11-07 19:28:56,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:28:56,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741913089] [2024-11-07 19:28:56,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:28:56,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:28:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:28:56,328 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 19:28:56,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:28:56,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741913089] [2024-11-07 19:28:56,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741913089] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:28:56,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413377665] [2024-11-07 19:28:56,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:28:56,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:28:56,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:28:56,333 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 19:28:56,335 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 19:28:56,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:28:56,390 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-07 19:28:56,393 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:28:56,428 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 19:28:56,476 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 19:28:56,476 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:28:56,525 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 19:28:56,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413377665] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:28:56,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:28:56,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-07 19:28:56,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342838755] [2024-11-07 19:28:56,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:28:56,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-07 19:28:56,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:28:56,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-07 19:28:56,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-11-07 19:28:56,660 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-11-07 19:28:56,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 39 transitions, 114 flow. Second operand has 9 states, 9 states have (on average 19.666666666666668) internal successors, (177), 9 states have internal predecessors, (177), 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 19:28:56,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:28:56,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-11-07 19:28:56,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:28:56,868 INFO L124 PetriNetUnfolderBase]: 43/144 cut-off events. [2024-11-07 19:28:56,868 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-07 19:28:56,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 144 events. 43/144 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 522 event pairs, 22 based on Foata normal form. 4/118 useless extension candidates. Maximal degree in co-relation 217. Up to 78 conditions per place. [2024-11-07 19:28:56,869 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 28 selfloop transitions, 14 changer transitions 0/55 dead transitions. [2024-11-07 19:28:56,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 55 transitions, 248 flow [2024-11-07 19:28:56,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:28:56,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:28:56,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-11-07 19:28:56,870 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-11-07 19:28:56,870 INFO L175 Difference]: Start difference. First operand has 38 places, 39 transitions, 114 flow. Second operand 6 states and 160 transitions. [2024-11-07 19:28:56,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 55 transitions, 248 flow [2024-11-07 19:28:56,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 55 transitions, 236 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:28:56,872 INFO L231 Difference]: Finished difference. Result has 44 places, 47 transitions, 198 flow [2024-11-07 19:28:56,872 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=198, PETRI_PLACES=44, PETRI_TRANSITIONS=47} [2024-11-07 19:28:56,872 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2024-11-07 19:28:56,872 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 47 transitions, 198 flow [2024-11-07 19:28:56,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.666666666666668) internal successors, (177), 9 states have internal predecessors, (177), 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 19:28:56,872 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:28:56,873 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-11-07 19:28:56,886 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 19:28:57,076 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:28:57,076 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-07 19:28:57,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:28:57,077 INFO L85 PathProgramCache]: Analyzing trace with hash -425273010, now seen corresponding path program 2 times [2024-11-07 19:28:57,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:28:57,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391328404] [2024-11-07 19:28:57,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:28:57,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:28:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:28:57,446 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:28:57,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:28:57,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391328404] [2024-11-07 19:28:57,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391328404] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:28:57,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794884307] [2024-11-07 19:28:57,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:28:57,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:28:57,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:28:57,450 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 19:28:57,451 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 19:28:57,508 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:28:57,508 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:28:57,509 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-07 19:28:57,511 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:28:57,520 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 19:28:57,695 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:28:57,695 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:28:57,933 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:28:57,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794884307] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:28:57,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:28:57,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-07 19:28:57,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909010084] [2024-11-07 19:28:57,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:28:57,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-07 19:28:57,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:28:57,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-07 19:28:57,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2024-11-07 19:28:58,362 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-11-07 19:28:58,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 47 transitions, 198 flow. Second operand has 20 states, 20 states have (on average 19.65) internal successors, (393), 20 states have internal predecessors, (393), 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 19:28:58,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:28:58,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-11-07 19:28:58,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:28:58,619 INFO L124 PetriNetUnfolderBase]: 39/140 cut-off events. [2024-11-07 19:28:58,619 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-07 19:28:58,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 274 conditions, 140 events. 39/140 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 481 event pairs, 22 based on Foata normal form. 8/120 useless extension candidates. Maximal degree in co-relation 211. Up to 68 conditions per place. [2024-11-07 19:28:58,620 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 23 selfloop transitions, 15 changer transitions 0/51 dead transitions. [2024-11-07 19:28:58,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 51 transitions, 246 flow [2024-11-07 19:28:58,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-07 19:28:58,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-07 19:28:58,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-11-07 19:28:58,623 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-11-07 19:28:58,623 INFO L175 Difference]: Start difference. First operand has 44 places, 47 transitions, 198 flow. Second operand 8 states and 190 transitions. [2024-11-07 19:28:58,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 51 transitions, 246 flow [2024-11-07 19:28:58,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 51 transitions, 208 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-11-07 19:28:58,624 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 156 flow [2024-11-07 19:28:58,625 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=156, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2024-11-07 19:28:58,625 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-11-07 19:28:58,625 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 156 flow [2024-11-07 19:28:58,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.65) internal successors, (393), 20 states have internal predecessors, (393), 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 19:28:58,626 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:28:58,626 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:28:58,638 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 19:28:58,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:28:58,830 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-07 19:28:58,830 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:28:58,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1693709676, now seen corresponding path program 1 times [2024-11-07 19:28:58,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:28:58,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025637317] [2024-11-07 19:28:58,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:28:58,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:28:58,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:28:58,997 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-07 19:28:58,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:28:58,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025637317] [2024-11-07 19:28:58,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025637317] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:28:58,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:28:58,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:28:58,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720409896] [2024-11-07 19:28:58,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:28:58,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:28:58,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:28:58,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:28:58,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:28:59,026 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-11-07 19:28:59,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 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 19:28:59,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:28:59,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-11-07 19:28:59,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:28:59,078 INFO L124 PetriNetUnfolderBase]: 50/159 cut-off events. [2024-11-07 19:28:59,078 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-11-07 19:28:59,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321 conditions, 159 events. 50/159 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 570 event pairs, 31 based on Foata normal form. 0/139 useless extension candidates. Maximal degree in co-relation 224. Up to 86 conditions per place. [2024-11-07 19:28:59,079 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 28 selfloop transitions, 3 changer transitions 0/41 dead transitions. [2024-11-07 19:28:59,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 41 transitions, 214 flow [2024-11-07 19:28:59,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:28:59,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:28:59,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-11-07 19:28:59,080 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-11-07 19:28:59,080 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 156 flow. Second operand 5 states and 98 transitions. [2024-11-07 19:28:59,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 41 transitions, 214 flow [2024-11-07 19:28:59,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 41 transitions, 186 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-11-07 19:28:59,081 INFO L231 Difference]: Finished difference. Result has 41 places, 41 transitions, 130 flow [2024-11-07 19:28:59,081 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=130, PETRI_PLACES=41, PETRI_TRANSITIONS=41} [2024-11-07 19:28:59,081 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2024-11-07 19:28:59,082 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 41 transitions, 130 flow [2024-11-07 19:28:59,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 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 19:28:59,082 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:28:59,082 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:28:59,082 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-07 19:28:59,082 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-07 19:28:59,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:28:59,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1693709675, now seen corresponding path program 1 times [2024-11-07 19:28:59,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:28:59,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565020482] [2024-11-07 19:28:59,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:28:59,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:28:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:28:59,419 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-07 19:28:59,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:28:59,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565020482] [2024-11-07 19:28:59,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565020482] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:28:59,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622228092] [2024-11-07 19:28:59,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:28:59,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:28:59,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:28:59,422 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 19:28:59,423 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 19:28:59,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:28:59,501 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-07 19:28:59,503 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:28:59,511 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 19:28:59,515 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 19:28:59,606 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-07 19:28:59,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-07 19:28:59,622 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-07 19:28:59,622 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 19:28:59,899 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-07 19:28:59,900 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:29:00,226 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-07 19:29:00,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622228092] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-07 19:29:00,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-07 19:29:00,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 8] total 21 [2024-11-07 19:29:00,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135030804] [2024-11-07 19:29:00,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:29:00,226 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-07 19:29:00,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:00,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-07 19:29:00,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2024-11-07 19:29:00,380 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-11-07 19:29:00,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 41 transitions, 130 flow. Second operand has 10 states, 10 states have (on average 19.8) internal successors, (198), 10 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:00,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:00,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-11-07 19:29:00,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:29:00,490 INFO L124 PetriNetUnfolderBase]: 86/233 cut-off events. [2024-11-07 19:29:00,490 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 19:29:00,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 233 events. 86/233 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 919 event pairs, 31 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 366. Up to 78 conditions per place. [2024-11-07 19:29:00,491 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 37 selfloop transitions, 6 changer transitions 0/52 dead transitions. [2024-11-07 19:29:00,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 52 transitions, 241 flow [2024-11-07 19:29:00,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:29:00,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:29:00,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-11-07 19:29:00,492 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-11-07 19:29:00,492 INFO L175 Difference]: Start difference. First operand has 41 places, 41 transitions, 130 flow. Second operand 6 states and 142 transitions. [2024-11-07 19:29:00,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 52 transitions, 241 flow [2024-11-07 19:29:00,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 52 transitions, 236 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:29:00,493 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 150 flow [2024-11-07 19:29:00,494 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=150, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2024-11-07 19:29:00,494 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-11-07 19:29:00,494 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 150 flow [2024-11-07 19:29:00,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.8) internal successors, (198), 10 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:00,494 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:00,494 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:29:00,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-07 19:29:00,695 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:29:00,695 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-07 19:29:00,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:00,695 INFO L85 PathProgramCache]: Analyzing trace with hash -965391780, now seen corresponding path program 1 times [2024-11-07 19:29:00,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:00,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300619317] [2024-11-07 19:29:00,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:00,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:00,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:00,778 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-07 19:29:00,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:00,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300619317] [2024-11-07 19:29:00,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300619317] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:29:00,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:29:00,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:29:00,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123519268] [2024-11-07 19:29:00,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:29:00,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:29:00,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:00,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:29:00,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:29:00,803 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-11-07 19:29:00,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:00,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:00,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-11-07 19:29:00,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:29:00,856 INFO L124 PetriNetUnfolderBase]: 73/200 cut-off events. [2024-11-07 19:29:00,856 INFO L125 PetriNetUnfolderBase]: For 67/72 co-relation queries the response was YES. [2024-11-07 19:29:00,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 200 events. 73/200 cut-off events. For 67/72 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 730 event pairs, 57 based on Foata normal form. 7/204 useless extension candidates. Maximal degree in co-relation 360. Up to 132 conditions per place. [2024-11-07 19:29:00,857 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 29 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2024-11-07 19:29:00,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 40 transitions, 208 flow [2024-11-07 19:29:00,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:29:00,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:29:00,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-11-07 19:29:00,859 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-11-07 19:29:00,859 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 150 flow. Second operand 4 states and 83 transitions. [2024-11-07 19:29:00,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 40 transitions, 208 flow [2024-11-07 19:29:00,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 200 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-07 19:29:00,860 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 142 flow [2024-11-07 19:29:00,860 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-11-07 19:29:00,860 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-11-07 19:29:00,860 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 142 flow [2024-11-07 19:29:00,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:00,860 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:00,860 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:29:00,861 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-07 19:29:00,861 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-07 19:29:00,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:00,861 INFO L85 PathProgramCache]: Analyzing trace with hash -965391779, now seen corresponding path program 1 times [2024-11-07 19:29:00,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:00,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020292451] [2024-11-07 19:29:00,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:00,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:01,100 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-07 19:29:01,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:01,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020292451] [2024-11-07 19:29:01,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020292451] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:29:01,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134055574] [2024-11-07 19:29:01,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:01,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:29:01,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:29:01,104 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 19:29:01,106 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 19:29:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:01,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-07 19:29:01,179 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:29:01,287 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-07 19:29:01,287 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:29:01,338 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 19:29:01,416 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-07 19:29:01,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134055574] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:29:01,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:29:01,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 20 [2024-11-07 19:29:01,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524818058] [2024-11-07 19:29:01,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:29:01,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-07 19:29:01,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:01,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-07 19:29:01,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2024-11-07 19:29:01,816 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-11-07 19:29:01,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 142 flow. Second operand has 21 states, 21 states have (on average 20.904761904761905) internal successors, (439), 21 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:01,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:01,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-11-07 19:29:01,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:29:02,067 INFO L124 PetriNetUnfolderBase]: 100/275 cut-off events. [2024-11-07 19:29:02,067 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-11-07 19:29:02,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 275 events. 100/275 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1069 event pairs, 31 based on Foata normal form. 16/274 useless extension candidates. Maximal degree in co-relation 520. Up to 86 conditions per place. [2024-11-07 19:29:02,069 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 47 selfloop transitions, 14 changer transitions 0/70 dead transitions. [2024-11-07 19:29:02,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 70 transitions, 352 flow [2024-11-07 19:29:02,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-07 19:29:02,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-07 19:29:02,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-11-07 19:29:02,070 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5976190476190476 [2024-11-07 19:29:02,070 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 142 flow. Second operand 10 states and 251 transitions. [2024-11-07 19:29:02,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 70 transitions, 352 flow [2024-11-07 19:29:02,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 349 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:29:02,071 INFO L231 Difference]: Finished difference. Result has 51 places, 42 transitions, 187 flow [2024-11-07 19:29:02,072 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=187, PETRI_PLACES=51, PETRI_TRANSITIONS=42} [2024-11-07 19:29:02,073 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-11-07 19:29:02,074 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 42 transitions, 187 flow [2024-11-07 19:29:02,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 20.904761904761905) internal successors, (439), 21 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:02,074 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:02,074 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:29:02,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-07 19:29:02,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-07 19:29:02,278 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-07 19:29:02,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:02,278 INFO L85 PathProgramCache]: Analyzing trace with hash 114216719, now seen corresponding path program 1 times [2024-11-07 19:29:02,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:02,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018007135] [2024-11-07 19:29:02,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:02,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:02,487 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-07 19:29:02,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:02,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018007135] [2024-11-07 19:29:02,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018007135] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:29:02,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768239540] [2024-11-07 19:29:02,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:02,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:29:02,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:29:02,490 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 19:29:02,491 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 19:29:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:02,569 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-07 19:29:02,571 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:29:02,683 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-07 19:29:02,683 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:29:02,743 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 19:29:02,818 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-07 19:29:02,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768239540] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:29:02,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:29:02,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9, 9] total 20 [2024-11-07 19:29:02,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179872486] [2024-11-07 19:29:02,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:29:02,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-07 19:29:02,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:02,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-07 19:29:02,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2024-11-07 19:29:03,063 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-11-07 19:29:03,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 42 transitions, 187 flow. Second operand has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:03,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:03,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-11-07 19:29:03,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:29:03,310 INFO L124 PetriNetUnfolderBase]: 257/591 cut-off events. [2024-11-07 19:29:03,310 INFO L125 PetriNetUnfolderBase]: For 504/521 co-relation queries the response was YES. [2024-11-07 19:29:03,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1431 conditions, 591 events. 257/591 cut-off events. For 504/521 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2876 event pairs, 84 based on Foata normal form. 0/568 useless extension candidates. Maximal degree in co-relation 1331. Up to 183 conditions per place. [2024-11-07 19:29:03,313 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 50 selfloop transitions, 15 changer transitions 0/73 dead transitions. [2024-11-07 19:29:03,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 73 transitions, 447 flow [2024-11-07 19:29:03,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-07 19:29:03,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-07 19:29:03,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-11-07 19:29:03,314 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.569047619047619 [2024-11-07 19:29:03,314 INFO L175 Difference]: Start difference. First operand has 51 places, 42 transitions, 187 flow. Second operand 10 states and 239 transitions. [2024-11-07 19:29:03,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 73 transitions, 447 flow [2024-11-07 19:29:03,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 73 transitions, 426 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-07 19:29:03,315 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 215 flow [2024-11-07 19:29:03,316 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=215, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2024-11-07 19:29:03,316 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 15 predicate places. [2024-11-07 19:29:03,319 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 215 flow [2024-11-07 19:29:03,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 20.19047619047619) internal successors, (424), 21 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:03,319 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:03,319 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:29:03,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-07 19:29:03,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:29:03,524 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-07 19:29:03,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:03,524 INFO L85 PathProgramCache]: Analyzing trace with hash -754248404, now seen corresponding path program 1 times [2024-11-07 19:29:03,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:03,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172833414] [2024-11-07 19:29:03,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:03,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:03,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:03,754 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-07 19:29:03,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:03,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172833414] [2024-11-07 19:29:03,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172833414] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:29:03,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051091483] [2024-11-07 19:29:03,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:03,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:29:03,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:29:03,757 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 19:29:03,758 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 19:29:03,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:03,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-07 19:29:03,838 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:29:03,842 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 19:29:03,882 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-07 19:29:03,883 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 12 treesize of output 14 [2024-11-07 19:29:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-07 19:29:04,069 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:29:04,264 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-07 19:29:04,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051091483] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-07 19:29:04,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-07 19:29:04,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [5, 9] total 22 [2024-11-07 19:29:04,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871187710] [2024-11-07 19:29:04,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:29:04,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-07 19:29:04,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:04,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-07 19:29:04,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2024-11-07 19:29:04,381 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-11-07 19:29:04,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 215 flow. Second operand has 10 states, 10 states have (on average 21.0) internal successors, (210), 10 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:04,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:04,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-11-07 19:29:04,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:29:04,510 INFO L124 PetriNetUnfolderBase]: 206/514 cut-off events. [2024-11-07 19:29:04,510 INFO L125 PetriNetUnfolderBase]: For 547/560 co-relation queries the response was YES. [2024-11-07 19:29:04,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1396 conditions, 514 events. 206/514 cut-off events. For 547/560 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2498 event pairs, 128 based on Foata normal form. 17/519 useless extension candidates. Maximal degree in co-relation 1292. Up to 271 conditions per place. [2024-11-07 19:29:04,512 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 39 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2024-11-07 19:29:04,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 54 transitions, 349 flow [2024-11-07 19:29:04,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:29:04,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:29:04,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-11-07 19:29:04,513 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-11-07 19:29:04,513 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 215 flow. Second operand 6 states and 145 transitions. [2024-11-07 19:29:04,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 54 transitions, 349 flow [2024-11-07 19:29:04,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 54 transitions, 328 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-07 19:29:04,515 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 208 flow [2024-11-07 19:29:04,515 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=208, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2024-11-07 19:29:04,516 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 15 predicate places. [2024-11-07 19:29:04,516 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 208 flow [2024-11-07 19:29:04,516 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.0) internal successors, (210), 10 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:04,516 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:04,516 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:29:04,528 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 19:29:04,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-07 19:29:04,718 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-07 19:29:04,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:04,718 INFO L85 PathProgramCache]: Analyzing trace with hash -28541918, now seen corresponding path program 1 times [2024-11-07 19:29:04,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:04,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361898797] [2024-11-07 19:29:04,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:04,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:04,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-07 19:29:04,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:04,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361898797] [2024-11-07 19:29:04,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361898797] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:29:04,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303277058] [2024-11-07 19:29:04,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:04,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:29:04,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:29:04,964 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 19:29:04,966 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 19:29:05,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:05,044 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-07 19:29:05,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:29:05,048 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 19:29:05,086 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-07 19:29:05,086 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 12 treesize of output 14 [2024-11-07 19:29:05,268 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-07 19:29:05,268 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:29:05,481 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-07 19:29:05,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303277058] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:29:05,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:29:05,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2024-11-07 19:29:05,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788986053] [2024-11-07 19:29:05,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:29:05,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-07 19:29:05,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:05,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-07 19:29:05,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2024-11-07 19:29:06,014 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-11-07 19:29:06,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 208 flow. Second operand has 26 states, 26 states have (on average 16.115384615384617) internal successors, (419), 26 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:06,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:06,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-11-07 19:29:06,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:29:06,619 INFO L124 PetriNetUnfolderBase]: 376/879 cut-off events. [2024-11-07 19:29:06,619 INFO L125 PetriNetUnfolderBase]: For 1183/1208 co-relation queries the response was YES. [2024-11-07 19:29:06,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2461 conditions, 879 events. 376/879 cut-off events. For 1183/1208 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4732 event pairs, 75 based on Foata normal form. 48/917 useless extension candidates. Maximal degree in co-relation 2345. Up to 153 conditions per place. [2024-11-07 19:29:06,623 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 76 selfloop transitions, 21 changer transitions 0/105 dead transitions. [2024-11-07 19:29:06,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 105 transitions, 655 flow [2024-11-07 19:29:06,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-07 19:29:06,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-07 19:29:06,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 375 transitions. [2024-11-07 19:29:06,625 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-11-07 19:29:06,625 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 208 flow. Second operand 20 states and 375 transitions. [2024-11-07 19:29:06,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 105 transitions, 655 flow [2024-11-07 19:29:06,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 105 transitions, 627 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-07 19:29:06,640 INFO L231 Difference]: Finished difference. Result has 76 places, 50 transitions, 297 flow [2024-11-07 19:29:06,640 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=297, PETRI_PLACES=76, PETRI_TRANSITIONS=50} [2024-11-07 19:29:06,641 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-11-07 19:29:06,641 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 50 transitions, 297 flow [2024-11-07 19:29:06,641 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 16.115384615384617) internal successors, (419), 26 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:06,641 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:06,641 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:29:06,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-07 19:29:06,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:29:06,842 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-07 19:29:06,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:06,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1455373354, now seen corresponding path program 1 times [2024-11-07 19:29:06,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:06,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191547738] [2024-11-07 19:29:06,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:06,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:06,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:07,082 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-07 19:29:07,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:07,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191547738] [2024-11-07 19:29:07,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191547738] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:29:07,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115253442] [2024-11-07 19:29:07,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:07,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:29:07,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:29:07,084 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 19:29:07,086 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 19:29:07,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:07,170 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-07 19:29:07,171 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:29:07,177 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 19:29:07,179 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 19:29:07,236 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-07 19:29:07,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-07 19:29:07,250 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-07 19:29:07,250 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 19:29:07,513 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-07 19:29:07,513 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:29:07,766 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-07 19:29:07,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115253442] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:29:07,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:29:07,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2024-11-07 19:29:07,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935614057] [2024-11-07 19:29:07,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:29:07,766 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-07 19:29:07,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:07,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-07 19:29:07,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2024-11-07 19:29:08,373 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-11-07 19:29:08,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 50 transitions, 297 flow. Second operand has 26 states, 26 states have (on average 19.23076923076923) internal successors, (500), 26 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:08,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:08,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-11-07 19:29:08,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:29:08,846 INFO L124 PetriNetUnfolderBase]: 458/1266 cut-off events. [2024-11-07 19:29:08,846 INFO L125 PetriNetUnfolderBase]: For 2146/2188 co-relation queries the response was YES. [2024-11-07 19:29:08,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3654 conditions, 1266 events. 458/1266 cut-off events. For 2146/2188 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 8053 event pairs, 138 based on Foata normal form. 81/1329 useless extension candidates. Maximal degree in co-relation 3532. Up to 306 conditions per place. [2024-11-07 19:29:08,853 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 77 selfloop transitions, 13 changer transitions 0/101 dead transitions. [2024-11-07 19:29:08,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 101 transitions, 795 flow [2024-11-07 19:29:08,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-07 19:29:08,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-07 19:29:08,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 289 transitions. [2024-11-07 19:29:08,854 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5293040293040293 [2024-11-07 19:29:08,854 INFO L175 Difference]: Start difference. First operand has 76 places, 50 transitions, 297 flow. Second operand 13 states and 289 transitions. [2024-11-07 19:29:08,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 101 transitions, 795 flow [2024-11-07 19:29:08,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 101 transitions, 726 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-11-07 19:29:08,858 INFO L231 Difference]: Finished difference. Result has 83 places, 53 transitions, 326 flow [2024-11-07 19:29:08,858 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=326, PETRI_PLACES=83, PETRI_TRANSITIONS=53} [2024-11-07 19:29:08,858 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-11-07 19:29:08,858 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 53 transitions, 326 flow [2024-11-07 19:29:08,858 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 19.23076923076923) internal successors, (500), 26 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:08,859 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:08,859 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2024-11-07 19:29:08,875 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 19:29:09,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:29:09,059 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-07 19:29:09,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:09,060 INFO L85 PathProgramCache]: Analyzing trace with hash -827986563, now seen corresponding path program 1 times [2024-11-07 19:29:09,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:09,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176123319] [2024-11-07 19:29:09,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:09,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:09,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:09,296 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-07 19:29:09,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:09,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176123319] [2024-11-07 19:29:09,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176123319] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:29:09,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435558333] [2024-11-07 19:29:09,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:09,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:29:09,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:29:09,299 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 19:29:09,300 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 19:29:09,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:09,386 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-07 19:29:09,387 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:29:09,538 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-07 19:29:09,538 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:29:09,645 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 19:29:09,732 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-07 19:29:09,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435558333] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:29:09,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:29:09,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 27 [2024-11-07 19:29:09,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680575782] [2024-11-07 19:29:09,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:29:09,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-07 19:29:09,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:09,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-07 19:29:09,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2024-11-07 19:29:10,280 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-11-07 19:29:10,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 53 transitions, 326 flow. Second operand has 28 states, 28 states have (on average 20.678571428571427) internal successors, (579), 28 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:10,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:10,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-11-07 19:29:10,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:29:10,830 INFO L124 PetriNetUnfolderBase]: 560/1433 cut-off events. [2024-11-07 19:29:10,831 INFO L125 PetriNetUnfolderBase]: For 3156/3178 co-relation queries the response was YES. [2024-11-07 19:29:10,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4499 conditions, 1433 events. 560/1433 cut-off events. For 3156/3178 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 8959 event pairs, 119 based on Foata normal form. 72/1479 useless extension candidates. Maximal degree in co-relation 4376. Up to 270 conditions per place. [2024-11-07 19:29:10,839 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 104 selfloop transitions, 18 changer transitions 0/133 dead transitions. [2024-11-07 19:29:10,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 133 transitions, 995 flow [2024-11-07 19:29:10,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-07 19:29:10,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-07 19:29:10,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 342 transitions. [2024-11-07 19:29:10,841 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6263736263736264 [2024-11-07 19:29:10,841 INFO L175 Difference]: Start difference. First operand has 83 places, 53 transitions, 326 flow. Second operand 13 states and 342 transitions. [2024-11-07 19:29:10,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 133 transitions, 995 flow [2024-11-07 19:29:10,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 133 transitions, 968 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-07 19:29:10,848 INFO L231 Difference]: Finished difference. Result has 90 places, 55 transitions, 377 flow [2024-11-07 19:29:10,848 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=377, PETRI_PLACES=90, PETRI_TRANSITIONS=55} [2024-11-07 19:29:10,849 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-11-07 19:29:10,849 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 55 transitions, 377 flow [2024-11-07 19:29:10,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 20.678571428571427) internal successors, (579), 28 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:10,849 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:10,849 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:29:10,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-07 19:29:11,050 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:29:11,050 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-07 19:29:11,050 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:11,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1181979473, now seen corresponding path program 1 times [2024-11-07 19:29:11,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:11,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868809144] [2024-11-07 19:29:11,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:11,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:11,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:11,155 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-07 19:29:11,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:11,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868809144] [2024-11-07 19:29:11,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868809144] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:29:11,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:29:11,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:29:11,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410576965] [2024-11-07 19:29:11,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:29:11,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:29:11,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:11,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:29:11,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:29:11,167 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 42 [2024-11-07 19:29:11,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 55 transitions, 377 flow. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:11,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:11,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 42 [2024-11-07 19:29:11,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:29:11,342 INFO L124 PetriNetUnfolderBase]: 523/1424 cut-off events. [2024-11-07 19:29:11,342 INFO L125 PetriNetUnfolderBase]: For 3510/3548 co-relation queries the response was YES. [2024-11-07 19:29:11,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4612 conditions, 1424 events. 523/1424 cut-off events. For 3510/3548 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 9172 event pairs, 380 based on Foata normal form. 2/1390 useless extension candidates. Maximal degree in co-relation 4482. Up to 825 conditions per place. [2024-11-07 19:29:11,349 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 62 selfloop transitions, 3 changer transitions 0/77 dead transitions. [2024-11-07 19:29:11,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 77 transitions, 687 flow [2024-11-07 19:29:11,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:29:11,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:29:11,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-11-07 19:29:11,350 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-11-07 19:29:11,350 INFO L175 Difference]: Start difference. First operand has 90 places, 55 transitions, 377 flow. Second operand 4 states and 114 transitions. [2024-11-07 19:29:11,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 77 transitions, 687 flow [2024-11-07 19:29:11,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 77 transitions, 647 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-07 19:29:11,354 INFO L231 Difference]: Finished difference. Result has 86 places, 56 transitions, 364 flow [2024-11-07 19:29:11,354 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=364, PETRI_PLACES=86, PETRI_TRANSITIONS=56} [2024-11-07 19:29:11,355 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-11-07 19:29:11,355 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 56 transitions, 364 flow [2024-11-07 19:29:11,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:11,355 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:11,356 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:29:11,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-07 19:29:11,356 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-07 19:29:11,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:11,356 INFO L85 PathProgramCache]: Analyzing trace with hash 595953299, now seen corresponding path program 2 times [2024-11-07 19:29:11,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:11,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116628339] [2024-11-07 19:29:11,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:11,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:11,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:11,456 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-07 19:29:11,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:11,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116628339] [2024-11-07 19:29:11,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116628339] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:29:11,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:29:11,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:29:11,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921665411] [2024-11-07 19:29:11,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:29:11,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:29:11,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:11,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:29:11,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:29:11,464 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 42 [2024-11-07 19:29:11,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 56 transitions, 364 flow. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:11,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:11,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 42 [2024-11-07 19:29:11,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:29:11,607 INFO L124 PetriNetUnfolderBase]: 520/1169 cut-off events. [2024-11-07 19:29:11,607 INFO L125 PetriNetUnfolderBase]: For 3590/3616 co-relation queries the response was YES. [2024-11-07 19:29:11,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4230 conditions, 1169 events. 520/1169 cut-off events. For 3590/3616 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 6741 event pairs, 388 based on Foata normal form. 3/1070 useless extension candidates. Maximal degree in co-relation 4109. Up to 841 conditions per place. [2024-11-07 19:29:11,612 INFO L140 encePairwiseOnDemand]: 38/42 looper letters, 64 selfloop transitions, 3 changer transitions 2/81 dead transitions. [2024-11-07 19:29:11,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 81 transitions, 655 flow [2024-11-07 19:29:11,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:29:11,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:29:11,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-11-07 19:29:11,613 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6964285714285714 [2024-11-07 19:29:11,613 INFO L175 Difference]: Start difference. First operand has 86 places, 56 transitions, 364 flow. Second operand 4 states and 117 transitions. [2024-11-07 19:29:11,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 81 transitions, 655 flow [2024-11-07 19:29:11,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 81 transitions, 645 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:29:11,617 INFO L231 Difference]: Finished difference. Result has 89 places, 57 transitions, 376 flow [2024-11-07 19:29:11,617 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=376, PETRI_PLACES=89, PETRI_TRANSITIONS=57} [2024-11-07 19:29:11,617 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-11-07 19:29:11,617 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 57 transitions, 376 flow [2024-11-07 19:29:11,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:11,617 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:11,617 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:29:11,617 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-07 19:29:11,618 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-07 19:29:11,618 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:11,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1043574799, now seen corresponding path program 3 times [2024-11-07 19:29:11,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:11,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309361972] [2024-11-07 19:29:11,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:11,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:11,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:11,726 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-07 19:29:11,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:11,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309361972] [2024-11-07 19:29:11,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309361972] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:29:11,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:29:11,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:29:11,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985088321] [2024-11-07 19:29:11,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:29:11,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:29:11,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:11,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:29:11,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:29:11,738 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-11-07 19:29:11,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 57 transitions, 376 flow. Second operand has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:11,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:11,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-11-07 19:29:11,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:29:11,982 INFO L124 PetriNetUnfolderBase]: 787/1820 cut-off events. [2024-11-07 19:29:11,983 INFO L125 PetriNetUnfolderBase]: For 5707/5765 co-relation queries the response was YES. [2024-11-07 19:29:11,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6588 conditions, 1820 events. 787/1820 cut-off events. For 5707/5765 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 11371 event pairs, 552 based on Foata normal form. 30/1838 useless extension candidates. Maximal degree in co-relation 6465. Up to 1133 conditions per place. [2024-11-07 19:29:11,994 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 68 selfloop transitions, 4 changer transitions 0/83 dead transitions. [2024-11-07 19:29:11,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 83 transitions, 733 flow [2024-11-07 19:29:11,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:29:11,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:29:11,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-11-07 19:29:11,995 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-11-07 19:29:11,996 INFO L175 Difference]: Start difference. First operand has 89 places, 57 transitions, 376 flow. Second operand 4 states and 114 transitions. [2024-11-07 19:29:11,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 83 transitions, 733 flow [2024-11-07 19:29:12,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 83 transitions, 721 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:29:12,001 INFO L231 Difference]: Finished difference. Result has 92 places, 59 transitions, 407 flow [2024-11-07 19:29:12,001 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=407, PETRI_PLACES=92, PETRI_TRANSITIONS=59} [2024-11-07 19:29:12,002 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-11-07 19:29:12,002 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 59 transitions, 407 flow [2024-11-07 19:29:12,002 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.5) internal successors, (94), 4 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:12,002 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:12,002 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:29:12,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-07 19:29:12,002 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-07 19:29:12,003 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:12,003 INFO L85 PathProgramCache]: Analyzing trace with hash -2028777029, now seen corresponding path program 4 times [2024-11-07 19:29:12,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:12,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815445229] [2024-11-07 19:29:12,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:12,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:12,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-07 19:29:12,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:12,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815445229] [2024-11-07 19:29:12,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815445229] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:29:12,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:29:12,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:29:12,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520558584] [2024-11-07 19:29:12,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:29:12,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:29:12,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:12,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:29:12,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:29:12,104 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 42 [2024-11-07 19:29:12,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 59 transitions, 407 flow. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:12,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:12,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 42 [2024-11-07 19:29:12,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:29:12,279 INFO L124 PetriNetUnfolderBase]: 544/1517 cut-off events. [2024-11-07 19:29:12,279 INFO L125 PetriNetUnfolderBase]: For 5707/5732 co-relation queries the response was YES. [2024-11-07 19:29:12,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5798 conditions, 1517 events. 544/1517 cut-off events. For 5707/5732 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 10202 event pairs, 18 based on Foata normal form. 30/1533 useless extension candidates. Maximal degree in co-relation 5673. Up to 919 conditions per place. [2024-11-07 19:29:12,289 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 60 selfloop transitions, 6 changer transitions 1/80 dead transitions. [2024-11-07 19:29:12,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 80 transitions, 714 flow [2024-11-07 19:29:12,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:29:12,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:29:12,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-11-07 19:29:12,290 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-11-07 19:29:12,290 INFO L175 Difference]: Start difference. First operand has 92 places, 59 transitions, 407 flow. Second operand 4 states and 112 transitions. [2024-11-07 19:29:12,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 80 transitions, 714 flow [2024-11-07 19:29:12,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 80 transitions, 707 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-07 19:29:12,297 INFO L231 Difference]: Finished difference. Result has 96 places, 60 transitions, 444 flow [2024-11-07 19:29:12,298 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=403, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=444, PETRI_PLACES=96, PETRI_TRANSITIONS=60} [2024-11-07 19:29:12,298 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-11-07 19:29:12,298 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 60 transitions, 444 flow [2024-11-07 19:29:12,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:12,298 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:12,298 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:29:12,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-07 19:29:12,298 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-07 19:29:12,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:12,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1545523249, now seen corresponding path program 1 times [2024-11-07 19:29:12,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:12,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812983391] [2024-11-07 19:29:12,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:12,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:12,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:12,510 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-11-07 19:29:12,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:12,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812983391] [2024-11-07 19:29:12,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812983391] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:29:12,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838459051] [2024-11-07 19:29:12,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:12,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:29:12,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:29:12,512 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 19:29:12,513 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 19:29:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:12,604 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-07 19:29:12,605 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:29:12,766 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-07 19:29:12,766 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:29:12,867 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 19:29:12,954 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-07 19:29:12,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838459051] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:29:12,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:29:12,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 11] total 27 [2024-11-07 19:29:12,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283888791] [2024-11-07 19:29:12,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:29:12,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-07 19:29:12,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:12,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-07 19:29:12,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2024-11-07 19:29:13,470 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-11-07 19:29:13,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 60 transitions, 444 flow. Second operand has 28 states, 28 states have (on average 20.107142857142858) internal successors, (563), 28 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:13,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:13,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-11-07 19:29:13,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:29:14,050 INFO L124 PetriNetUnfolderBase]: 947/2069 cut-off events. [2024-11-07 19:29:14,050 INFO L125 PetriNetUnfolderBase]: For 8668/8726 co-relation queries the response was YES. [2024-11-07 19:29:14,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8123 conditions, 2069 events. 947/2069 cut-off events. For 8668/8726 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 12502 event pairs, 170 based on Foata normal form. 96/2125 useless extension candidates. Maximal degree in co-relation 7995. Up to 344 conditions per place. [2024-11-07 19:29:14,070 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 108 selfloop transitions, 21 changer transitions 0/139 dead transitions. [2024-11-07 19:29:14,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 139 transitions, 1297 flow [2024-11-07 19:29:14,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-07 19:29:14,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-07 19:29:14,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 321 transitions. [2024-11-07 19:29:14,073 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5879120879120879 [2024-11-07 19:29:14,074 INFO L175 Difference]: Start difference. First operand has 96 places, 60 transitions, 444 flow. Second operand 13 states and 321 transitions. [2024-11-07 19:29:14,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 139 transitions, 1297 flow [2024-11-07 19:29:14,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 139 transitions, 1278 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-07 19:29:14,082 INFO L231 Difference]: Finished difference. Result has 107 places, 61 transitions, 498 flow [2024-11-07 19:29:14,083 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=430, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=498, PETRI_PLACES=107, PETRI_TRANSITIONS=61} [2024-11-07 19:29:14,084 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-11-07 19:29:14,084 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 61 transitions, 498 flow [2024-11-07 19:29:14,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 20.107142857142858) internal successors, (563), 28 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:14,084 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:14,084 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:29:14,097 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 19:29:14,284 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,SelfDestructingSolverStorable17 [2024-11-07 19:29:14,285 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-07 19:29:14,285 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:14,285 INFO L85 PathProgramCache]: Analyzing trace with hash 969379333, now seen corresponding path program 1 times [2024-11-07 19:29:14,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:14,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991448354] [2024-11-07 19:29:14,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:14,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:14,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:14,392 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-07 19:29:14,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:14,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991448354] [2024-11-07 19:29:14,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991448354] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:29:14,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:29:14,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:29:14,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603550843] [2024-11-07 19:29:14,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:29:14,393 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:29:14,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:14,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:29:14,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:29:14,406 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 42 [2024-11-07 19:29:14,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 61 transitions, 498 flow. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:14,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:14,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 42 [2024-11-07 19:29:14,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:29:14,674 INFO L124 PetriNetUnfolderBase]: 908/2209 cut-off events. [2024-11-07 19:29:14,675 INFO L125 PetriNetUnfolderBase]: For 10585/10640 co-relation queries the response was YES. [2024-11-07 19:29:14,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8906 conditions, 2209 events. 908/2209 cut-off events. For 10585/10640 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 14465 event pairs, 611 based on Foata normal form. 22/2215 useless extension candidates. Maximal degree in co-relation 8765. Up to 1328 conditions per place. [2024-11-07 19:29:14,688 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 69 selfloop transitions, 5 changer transitions 0/87 dead transitions. [2024-11-07 19:29:14,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 87 transitions, 866 flow [2024-11-07 19:29:14,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:29:14,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:29:14,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-11-07 19:29:14,689 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6964285714285714 [2024-11-07 19:29:14,689 INFO L175 Difference]: Start difference. First operand has 107 places, 61 transitions, 498 flow. Second operand 4 states and 117 transitions. [2024-11-07 19:29:14,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 87 transitions, 866 flow [2024-11-07 19:29:14,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 87 transitions, 798 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-11-07 19:29:14,699 INFO L231 Difference]: Finished difference. Result has 101 places, 63 transitions, 498 flow [2024-11-07 19:29:14,699 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=456, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=498, PETRI_PLACES=101, PETRI_TRANSITIONS=63} [2024-11-07 19:29:14,699 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-11-07 19:29:14,699 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 63 transitions, 498 flow [2024-11-07 19:29:14,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:14,700 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:14,700 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:29:14,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-07 19:29:14,700 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-07 19:29:14,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:14,700 INFO L85 PathProgramCache]: Analyzing trace with hash 747439645, now seen corresponding path program 2 times [2024-11-07 19:29:14,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:14,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078951945] [2024-11-07 19:29:14,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:14,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:14,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:14,797 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-11-07 19:29:14,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:14,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078951945] [2024-11-07 19:29:14,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078951945] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:29:14,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:29:14,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:29:14,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22036903] [2024-11-07 19:29:14,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:29:14,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:29:14,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:14,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:29:14,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:29:14,806 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 42 [2024-11-07 19:29:14,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 63 transitions, 498 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:14,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:14,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 42 [2024-11-07 19:29:14,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:29:15,017 INFO L124 PetriNetUnfolderBase]: 628/1691 cut-off events. [2024-11-07 19:29:15,017 INFO L125 PetriNetUnfolderBase]: For 9290/9358 co-relation queries the response was YES. [2024-11-07 19:29:15,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7044 conditions, 1691 events. 628/1691 cut-off events. For 9290/9358 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 11073 event pairs, 46 based on Foata normal form. 22/1696 useless extension candidates. Maximal degree in co-relation 6912. Up to 952 conditions per place. [2024-11-07 19:29:15,028 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 57 selfloop transitions, 8 changer transitions 1/81 dead transitions. [2024-11-07 19:29:15,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 81 transitions, 806 flow [2024-11-07 19:29:15,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:29:15,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:29:15,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-11-07 19:29:15,029 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6547619047619048 [2024-11-07 19:29:15,029 INFO L175 Difference]: Start difference. First operand has 101 places, 63 transitions, 498 flow. Second operand 4 states and 110 transitions. [2024-11-07 19:29:15,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 81 transitions, 806 flow [2024-11-07 19:29:15,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 81 transitions, 798 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-07 19:29:15,039 INFO L231 Difference]: Finished difference. Result has 105 places, 64 transitions, 546 flow [2024-11-07 19:29:15,039 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=546, PETRI_PLACES=105, PETRI_TRANSITIONS=64} [2024-11-07 19:29:15,040 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-11-07 19:29:15,040 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 64 transitions, 546 flow [2024-11-07 19:29:15,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:15,040 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:15,040 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1] [2024-11-07 19:29:15,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-07 19:29:15,040 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-07 19:29:15,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:15,041 INFO L85 PathProgramCache]: Analyzing trace with hash -117255083, now seen corresponding path program 2 times [2024-11-07 19:29:15,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:15,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426144777] [2024-11-07 19:29:15,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:15,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:15,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:15,546 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-07 19:29:15,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:15,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426144777] [2024-11-07 19:29:15,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426144777] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:29:15,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80794913] [2024-11-07 19:29:15,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:29:15,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:29:15,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:29:15,548 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 19:29:15,550 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 19:29:15,658 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:29:15,658 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:29:15,659 INFO L255 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-07 19:29:15,661 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:29:15,665 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 19:29:15,715 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-07 19:29:15,716 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 12 treesize of output 14 [2024-11-07 19:29:16,125 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-07 19:29:16,125 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:29:16,527 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 26 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-07 19:29:16,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80794913] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:29:16,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:29:16,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 12] total 35 [2024-11-07 19:29:16,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132562635] [2024-11-07 19:29:16,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:29:16,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-07 19:29:16,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:16,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-07 19:29:16,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1059, Unknown=0, NotChecked=0, Total=1332 [2024-11-07 19:29:17,531 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-11-07 19:29:17,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 64 transitions, 546 flow. Second operand has 37 states, 37 states have (on average 17.945945945945947) internal successors, (664), 37 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:17,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:29:17,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-11-07 19:29:17,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:29:18,551 INFO L124 PetriNetUnfolderBase]: 928/2016 cut-off events. [2024-11-07 19:29:18,551 INFO L125 PetriNetUnfolderBase]: For 13212/13271 co-relation queries the response was YES. [2024-11-07 19:29:18,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8727 conditions, 2016 events. 928/2016 cut-off events. For 13212/13271 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 12246 event pairs, 143 based on Foata normal form. 28/2002 useless extension candidates. Maximal degree in co-relation 8592. Up to 342 conditions per place. [2024-11-07 19:29:18,590 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 121 selfloop transitions, 26 changer transitions 0/158 dead transitions. [2024-11-07 19:29:18,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 158 transitions, 1554 flow [2024-11-07 19:29:18,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-07 19:29:18,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-11-07 19:29:18,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 460 transitions. [2024-11-07 19:29:18,591 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49783549783549785 [2024-11-07 19:29:18,592 INFO L175 Difference]: Start difference. First operand has 105 places, 64 transitions, 546 flow. Second operand 22 states and 460 transitions. [2024-11-07 19:29:18,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 158 transitions, 1554 flow [2024-11-07 19:29:18,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 158 transitions, 1532 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-07 19:29:18,601 INFO L231 Difference]: Finished difference. Result has 123 places, 65 transitions, 604 flow [2024-11-07 19:29:18,602 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=604, PETRI_PLACES=123, PETRI_TRANSITIONS=65} [2024-11-07 19:29:18,602 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-11-07 19:29:18,602 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 65 transitions, 604 flow [2024-11-07 19:29:18,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 17.945945945945947) internal successors, (664), 37 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:29:18,603 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:29:18,603 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:29:18,616 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 19:29:18,803 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,SelfDestructingSolverStorable20 [2024-11-07 19:29:18,803 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-07 19:29:18,804 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:29:18,804 INFO L85 PathProgramCache]: Analyzing trace with hash -438428342, now seen corresponding path program 1 times [2024-11-07 19:29:18,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:29:18,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268037832] [2024-11-07 19:29:18,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:18,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:29:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-07 19:29:19,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:29:19,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268037832] [2024-11-07 19:29:19,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268037832] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:29:19,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775474632] [2024-11-07 19:29:19,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:29:19,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:29:19,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:29:19,372 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 19:29:19,373 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 19:29:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:29:19,465 INFO L255 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-07 19:29:19,466 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:29:19,587 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:29:19,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2024-11-07 19:29:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-07 19:29:19,618 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:29:36,313 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-07 19:29:36,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 50 treesize of output 50 [2024-11-07 19:29:36,343 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-07 19:29:36,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775474632] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:29:36,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:29:36,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 28 [2024-11-07 19:29:36,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983949155] [2024-11-07 19:29:36,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:29:36,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-07 19:29:36,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:29:36,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-07 19:29:36,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=636, Unknown=4, NotChecked=0, Total=756 [2024-11-07 19:29:40,357 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-07 19:29:44,448 WARN L539 Checker$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 19:29:48,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-07 19:29:52,561 WARN L539 Checker$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 19:29:56,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-07 19:30:00,674 WARN L539 Checker$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 19:30:04,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-07 19:30:08,782 WARN L539 Checker$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 19:30:12,841 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-07 19:30:16,896 WARN L539 Checker$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 19:30:20,916 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 19:30:20,916 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 42 [2024-11-07 19:30:20,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 65 transitions, 604 flow. Second operand has 28 states, 28 states have (on average 8.107142857142858) internal successors, (227), 28 states have internal predecessors, (227), 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 19:30:20,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:20,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 42 [2024-11-07 19:30:20,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:21,952 INFO L124 PetriNetUnfolderBase]: 2633/4554 cut-off events. [2024-11-07 19:30:21,952 INFO L125 PetriNetUnfolderBase]: For 21150/21150 co-relation queries the response was YES. [2024-11-07 19:30:21,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19577 conditions, 4554 events. 2633/4554 cut-off events. For 21150/21150 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 24024 event pairs, 1174 based on Foata normal form. 1/4555 useless extension candidates. Maximal degree in co-relation 19428. Up to 3704 conditions per place. [2024-11-07 19:30:21,978 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 110 selfloop transitions, 23 changer transitions 3/137 dead transitions. [2024-11-07 19:30:21,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 137 transitions, 1399 flow [2024-11-07 19:30:21,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-07 19:30:21,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-07 19:30:21,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 173 transitions. [2024-11-07 19:30:21,981 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2942176870748299 [2024-11-07 19:30:21,981 INFO L175 Difference]: Start difference. First operand has 123 places, 65 transitions, 604 flow. Second operand 14 states and 173 transitions. [2024-11-07 19:30:21,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 137 transitions, 1399 flow [2024-11-07 19:30:21,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 137 transitions, 1337 flow, removed 1 selfloop flow, removed 20 redundant places. [2024-11-07 19:30:22,000 INFO L231 Difference]: Finished difference. Result has 122 places, 78 transitions, 780 flow [2024-11-07 19:30:22,000 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=554, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=780, PETRI_PLACES=122, PETRI_TRANSITIONS=78} [2024-11-07 19:30:22,001 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-11-07 19:30:22,001 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 78 transitions, 780 flow [2024-11-07 19:30:22,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 8.107142857142858) internal successors, (227), 28 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:22,001 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:22,001 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:22,017 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 19:30:22,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:22,202 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-07 19:30:22,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:22,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1161539514, now seen corresponding path program 2 times [2024-11-07 19:30:22,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:22,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952603278] [2024-11-07 19:30:22,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:22,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:22,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:22,735 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-07 19:30:22,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:22,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952603278] [2024-11-07 19:30:22,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952603278] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:22,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623431064] [2024-11-07 19:30:22,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:30:22,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:22,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:22,738 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 19:30:22,738 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 19:30:22,833 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:30:22,833 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:30:22,835 INFO L255 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-07 19:30:22,836 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:22,983 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:30:22,984 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-07 19:30:23,006 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-07 19:30:23,006 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:30:23,420 INFO L349 Elim1Store]: treesize reduction 28, result has 63.6 percent of original size [2024-11-07 19:30:23,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 56 [2024-11-07 19:30:23,439 INFO L349 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2024-11-07 19:30:23,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2024-11-07 19:30:23,449 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-07 19:30:23,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-11-07 19:30:23,455 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-07 19:30:23,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-11-07 19:30:23,460 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-07 19:30:23,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 1 [2024-11-07 19:30:23,466 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-07 19:30:23,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-11-07 19:30:23,475 INFO L349 Elim1Store]: treesize reduction 76, result has 1.3 percent of original size [2024-11-07 19:30:23,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 1 [2024-11-07 19:30:23,509 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-07 19:30:23,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623431064] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:30:23,510 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:30:23,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 25 [2024-11-07 19:30:23,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333838] [2024-11-07 19:30:23,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:30:23,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-07 19:30:23,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:23,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-07 19:30:23,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2024-11-07 19:30:24,199 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-11-07 19:30:24,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 78 transitions, 780 flow. Second operand has 25 states, 25 states have (on average 18.2) internal successors, (455), 25 states have internal predecessors, (455), 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 19:30:24,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:24,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-11-07 19:30:24,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:30:25,160 INFO L124 PetriNetUnfolderBase]: 2393/4360 cut-off events. [2024-11-07 19:30:25,161 INFO L125 PetriNetUnfolderBase]: For 23064/23072 co-relation queries the response was YES. [2024-11-07 19:30:25,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19693 conditions, 4360 events. 2393/4360 cut-off events. For 23064/23072 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 24434 event pairs, 1181 based on Foata normal form. 1/4361 useless extension candidates. Maximal degree in co-relation 19551. Up to 3289 conditions per place. [2024-11-07 19:30:25,186 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 101 selfloop transitions, 34 changer transitions 2/142 dead transitions. [2024-11-07 19:30:25,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 142 transitions, 1510 flow [2024-11-07 19:30:25,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-07 19:30:25,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-07 19:30:25,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 313 transitions. [2024-11-07 19:30:25,187 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.532312925170068 [2024-11-07 19:30:25,187 INFO L175 Difference]: Start difference. First operand has 122 places, 78 transitions, 780 flow. Second operand 14 states and 313 transitions. [2024-11-07 19:30:25,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 142 transitions, 1510 flow [2024-11-07 19:30:25,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 142 transitions, 1436 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-11-07 19:30:25,213 INFO L231 Difference]: Finished difference. Result has 136 places, 96 transitions, 1058 flow [2024-11-07 19:30:25,214 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=723, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1058, PETRI_PLACES=136, PETRI_TRANSITIONS=96} [2024-11-07 19:30:25,214 INFO L277 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-11-07 19:30:25,214 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 96 transitions, 1058 flow [2024-11-07 19:30:25,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.2) internal successors, (455), 25 states have internal predecessors, (455), 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 19:30:25,214 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:30:25,215 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:30:25,227 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 19:30:25,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:25,419 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-11-07 19:30:25,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:30:25,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1430750380, now seen corresponding path program 3 times [2024-11-07 19:30:25,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:30:25,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286468607] [2024-11-07 19:30:25,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:30:25,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:30:25,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:30:26,569 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-11-07 19:30:26,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:30:26,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286468607] [2024-11-07 19:30:26,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286468607] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:30:26,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390467882] [2024-11-07 19:30:26,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-07 19:30:26,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:30:26,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:30:26,571 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 19:30:26,572 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 19:30:26,655 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-07 19:30:26,655 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:30:26,656 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-07 19:30:26,658 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:30:26,846 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:30:26,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-11-07 19:30:26,881 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-07 19:30:26,881 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:30:27,396 INFO L349 Elim1Store]: treesize reduction 28, result has 59.4 percent of original size [2024-11-07 19:30:27,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 50 [2024-11-07 19:30:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-07 19:30:27,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390467882] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:30:27,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:30:27,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 10] total 36 [2024-11-07 19:30:27,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943150204] [2024-11-07 19:30:27,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:30:27,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-07 19:30:27,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:30:27,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-07 19:30:27,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2024-11-07 19:30:28,540 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-11-07 19:30:28,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 96 transitions, 1058 flow. Second operand has 36 states, 36 states have (on average 16.02777777777778) internal successors, (577), 36 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:30:28,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:30:28,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-11-07 19:30:28,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand