./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4f9af400 extending candidate: java ['java'] extending candidate: /usr/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/oracle-jdk-bin-*/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/openjdk-*/bin/java ['java', '/usr/bin/java'] extending candidate: /usr/lib/jvm/java-*-openjdk-amd64/bin/java ['java', '/usr/bin/java', '/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java', '/usr/lib/jvm/java-17-openjdk-amd64/bin/java', '/usr/lib/jvm/java-11-openjdk-amd64/bin/java', '/usr/lib/jvm/java-1.17.0-openjdk-amd64/bin/java'] ['/root/.sdkman/candidates/java/21.0.5-tem/bin/java', '-Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config', '-Xmx15G', '-Xms4m', '-jar', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar', '-data', '@noDefault', '-ultimatedata', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data', '-tc', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml', '-i', '../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.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', '20832c4ec3f8ccecbcf7cfcec0aecbbc925bfb9e6d8397db46b5825bb40681b3'] Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.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 20832c4ec3f8ccecbcf7cfcec0aecbbc925bfb9e6d8397db46b5825bb40681b3 --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-07 19:33:33,260 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-07 19:33:33,338 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-07 19:33:33,344 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-07 19:33:33,348 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-07 19:33:33,382 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-07 19:33:33,384 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-07 19:33:33,385 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-07 19:33:33,385 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-07 19:33:33,386 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-07 19:33:33,387 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-07 19:33:33,387 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-07 19:33:33,387 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-07 19:33:33,387 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-07 19:33:33,387 INFO L153 SettingsManager]: * Use SBE=true [2024-11-07 19:33:33,388 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-07 19:33:33,388 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-07 19:33:33,388 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-07 19:33:33,388 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-07 19:33:33,388 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-07 19:33:33,388 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-07 19:33:33,389 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-07 19:33:33,389 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-07 19:33:33,389 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-07 19:33:33,389 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-07 19:33:33,389 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-07 19:33:33,389 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-07 19:33:33,390 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-07 19:33:33,390 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-07 19:33:33,390 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-07 19:33:33,390 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-07 19:33:33,390 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-07 19:33:33,390 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-07 19:33:33,390 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:33:33,391 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-07 19:33:33,391 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-07 19:33:33,391 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-07 19:33:33,391 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-07 19:33:33,392 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-07 19:33:33,392 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-07 19:33:33,392 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-07 19:33:33,392 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-07 19:33:33,392 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 -> 20832c4ec3f8ccecbcf7cfcec0aecbbc925bfb9e6d8397db46b5825bb40681b3 [2024-11-07 19:33:33,698 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-07 19:33:33,704 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-07 19:33:33,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-07 19:33:33,709 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-07 19:33:33,709 INFO L274 PluginConnector]: CDTParser initialized [2024-11-07 19:33:33,710 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2024-11-07 19:33:35,072 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-07 19:33:35,299 INFO L384 CDTParser]: Found 1 translation units. [2024-11-07 19:33:35,301 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2024-11-07 19:33:35,309 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/545c786d2/260d5095283640309e07aa860ac1f50e/FLAGd7889401c [2024-11-07 19:33:35,325 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/545c786d2/260d5095283640309e07aa860ac1f50e [2024-11-07 19:33:35,327 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-07 19:33:35,328 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-07 19:33:35,329 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-07 19:33:35,329 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-07 19:33:35,333 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-07 19:33:35,334 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:33:35" (1/1) ... [2024-11-07 19:33:35,334 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18017b9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:35, skipping insertion in model container [2024-11-07 19:33:35,335 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:33:35" (1/1) ... [2024-11-07 19:33:35,348 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-07 19:33:35,519 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 19:33:35,523 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:33:35,539 INFO L200 MainTranslator]: Completed pre-run [2024-11-07 19:33:35,572 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:33:35,589 INFO L204 MainTranslator]: Completed translation [2024-11-07 19:33:35,589 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:35 WrapperNode [2024-11-07 19:33:35,590 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-07 19:33:35,591 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-07 19:33:35,591 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-07 19:33:35,591 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-07 19:33:35,597 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:35" (1/1) ... [2024-11-07 19:33:35,604 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:35" (1/1) ... [2024-11-07 19:33:35,634 INFO L138 Inliner]: procedures = 25, calls = 31, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 267 [2024-11-07 19:33:35,635 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-07 19:33:35,635 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-07 19:33:35,636 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-07 19:33:35,636 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-07 19:33:35,643 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:35" (1/1) ... [2024-11-07 19:33:35,643 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:35" (1/1) ... [2024-11-07 19:33:35,650 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:35" (1/1) ... [2024-11-07 19:33:35,675 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-11-07 19:33:35,675 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:35" (1/1) ... [2024-11-07 19:33:35,676 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:35" (1/1) ... [2024-11-07 19:33:35,691 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:35" (1/1) ... [2024-11-07 19:33:35,699 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:35" (1/1) ... [2024-11-07 19:33:35,701 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:35" (1/1) ... [2024-11-07 19:33:35,702 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:35" (1/1) ... [2024-11-07 19:33:35,704 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-07 19:33:35,705 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-07 19:33:35,705 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-07 19:33:35,705 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-07 19:33:35,706 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:35" (1/1) ... [2024-11-07 19:33:35,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:33:35,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:33:35,744 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 19:33:35,749 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 19:33:35,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-07 19:33:35,768 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-07 19:33:35,768 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-07 19:33:35,769 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-07 19:33:35,769 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-07 19:33:35,769 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-07 19:33:35,769 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-07 19:33:35,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-07 19:33:35,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-07 19:33:35,769 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-07 19:33:35,770 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-07 19:33:35,770 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-07 19:33:35,770 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-07 19:33:35,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-07 19:33:35,770 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-07 19:33:35,770 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-07 19:33:35,772 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 19:33:35,876 INFO L238 CfgBuilder]: Building ICFG [2024-11-07 19:33:35,877 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-07 19:33:36,437 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-07 19:33:36,438 INFO L287 CfgBuilder]: Performing block encoding [2024-11-07 19:33:36,852 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-07 19:33:36,853 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-07 19:33:36,853 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:33:36 BoogieIcfgContainer [2024-11-07 19:33:36,853 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-07 19:33:36,856 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-07 19:33:36,857 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-07 19:33:36,861 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-07 19:33:36,862 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:33:35" (1/3) ... [2024-11-07 19:33:36,863 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2543a78a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:33:36, skipping insertion in model container [2024-11-07 19:33:36,863 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:33:35" (2/3) ... [2024-11-07 19:33:36,863 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2543a78a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:33:36, skipping insertion in model container [2024-11-07 19:33:36,863 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:33:36" (3/3) ... [2024-11-07 19:33:36,865 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-three-array-sum-alt.wvr.c [2024-11-07 19:33:36,881 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-07 19:33:36,881 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2024-11-07 19:33:36,882 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-07 19:33:36,967 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-07 19:33:37,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 60 transitions, 141 flow [2024-11-07 19:33:37,043 INFO L124 PetriNetUnfolderBase]: 6/57 cut-off events. [2024-11-07 19:33:37,045 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-07 19:33:37,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 57 events. 6/57 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 113 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2024-11-07 19:33:37,049 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 60 transitions, 141 flow [2024-11-07 19:33:37,055 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 56 transitions, 130 flow [2024-11-07 19:33:37,067 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 19:33:37,080 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;@6c67f672, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 19:33:37,081 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-11-07 19:33:37,084 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 19:33:37,084 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-07 19:33:37,085 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 19:33:37,085 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:37,086 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:33:37,087 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-07 19:33:37,090 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:37,091 INFO L85 PathProgramCache]: Analyzing trace with hash 900566, now seen corresponding path program 1 times [2024-11-07 19:33:37,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:37,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24737475] [2024-11-07 19:33:37,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:37,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:37,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:37,349 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 19:33:37,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:37,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24737475] [2024-11-07 19:33:37,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24737475] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:37,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:37,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-07 19:33:37,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940746673] [2024-11-07 19:33:37,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:37,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:33:37,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:37,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:33:37,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:33:37,426 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-11-07 19:33:37,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 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 19:33:37,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:37,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-11-07 19:33:37,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:37,676 INFO L124 PetriNetUnfolderBase]: 306/579 cut-off events. [2024-11-07 19:33:37,676 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2024-11-07 19:33:37,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1080 conditions, 579 events. 306/579 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2477 event pairs, 202 based on Foata normal form. 1/500 useless extension candidates. Maximal degree in co-relation 906. Up to 441 conditions per place. [2024-11-07 19:33:37,685 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 29 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2024-11-07 19:33:37,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 51 transitions, 182 flow [2024-11-07 19:33:37,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:33:37,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:33:37,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-11-07 19:33:37,700 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5944444444444444 [2024-11-07 19:33:37,702 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 130 flow. Second operand 3 states and 107 transitions. [2024-11-07 19:33:37,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 51 transitions, 182 flow [2024-11-07 19:33:37,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 170 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-07 19:33:37,712 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 112 flow [2024-11-07 19:33:37,716 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2024-11-07 19:33:37,719 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2024-11-07 19:33:37,719 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 112 flow [2024-11-07 19:33:37,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 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 19:33:37,719 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:37,719 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:33:37,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-07 19:33:37,720 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-07 19:33:37,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:37,720 INFO L85 PathProgramCache]: Analyzing trace with hash 900567, now seen corresponding path program 1 times [2024-11-07 19:33:37,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:37,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195250737] [2024-11-07 19:33:37,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:37,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:37,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:38,028 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 19:33:38,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:38,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195250737] [2024-11-07 19:33:38,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195250737] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:38,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:38,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:33:38,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041719910] [2024-11-07 19:33:38,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:38,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:33:38,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:38,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:33:38,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:33:38,076 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-11-07 19:33:38,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 112 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 19:33:38,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:38,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-11-07 19:33:38,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:38,275 INFO L124 PetriNetUnfolderBase]: 306/578 cut-off events. [2024-11-07 19:33:38,275 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-07 19:33:38,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1047 conditions, 578 events. 306/578 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2465 event pairs, 202 based on Foata normal form. 0/497 useless extension candidates. Maximal degree in co-relation 1018. Up to 449 conditions per place. [2024-11-07 19:33:38,286 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 29 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2024-11-07 19:33:38,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 50 transitions, 176 flow [2024-11-07 19:33:38,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:33:38,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:33:38,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-11-07 19:33:38,289 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-11-07 19:33:38,289 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 112 flow. Second operand 4 states and 130 transitions. [2024-11-07 19:33:38,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 50 transitions, 176 flow [2024-11-07 19:33:38,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 50 transitions, 172 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:33:38,292 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 114 flow [2024-11-07 19:33:38,293 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-11-07 19:33:38,294 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2024-11-07 19:33:38,294 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 114 flow [2024-11-07 19:33:38,294 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 19:33:38,294 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:38,295 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-07 19:33:38,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-07 19:33:38,295 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-07 19:33:38,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:38,295 INFO L85 PathProgramCache]: Analyzing trace with hash 27918966, now seen corresponding path program 1 times [2024-11-07 19:33:38,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:38,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671626820] [2024-11-07 19:33:38,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:38,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:38,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:38,423 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 19:33:38,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:38,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671626820] [2024-11-07 19:33:38,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671626820] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:38,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:38,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:33:38,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701699420] [2024-11-07 19:33:38,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:38,425 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:33:38,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:38,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:33:38,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:33:38,445 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2024-11-07 19:33:38,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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 19:33:38,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:38,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2024-11-07 19:33:38,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:38,609 INFO L124 PetriNetUnfolderBase]: 309/591 cut-off events. [2024-11-07 19:33:38,609 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-07 19:33:38,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1074 conditions, 591 events. 309/591 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2541 event pairs, 202 based on Foata normal form. 0/508 useless extension candidates. Maximal degree in co-relation 1022. Up to 452 conditions per place. [2024-11-07 19:33:38,614 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 32 selfloop transitions, 10 changer transitions 0/61 dead transitions. [2024-11-07 19:33:38,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 61 transitions, 226 flow [2024-11-07 19:33:38,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:33:38,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:33:38,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-11-07 19:33:38,616 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-11-07 19:33:38,616 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 114 flow. Second operand 4 states and 152 transitions. [2024-11-07 19:33:38,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 61 transitions, 226 flow [2024-11-07 19:33:38,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 212 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:33:38,618 INFO L231 Difference]: Finished difference. Result has 53 places, 58 transitions, 168 flow [2024-11-07 19:33:38,619 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=53, PETRI_TRANSITIONS=58} [2024-11-07 19:33:38,619 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -7 predicate places. [2024-11-07 19:33:38,619 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 58 transitions, 168 flow [2024-11-07 19:33:38,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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 19:33:38,620 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:38,620 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-07 19:33:38,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-07 19:33:38,620 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-07 19:33:38,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:38,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1059916041, now seen corresponding path program 1 times [2024-11-07 19:33:38,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:38,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22913030] [2024-11-07 19:33:38,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:38,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:38,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:38,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:38,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:38,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22913030] [2024-11-07 19:33:38,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22913030] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:33:38,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476832022] [2024-11-07 19:33:38,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:38,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:38,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:33:38,899 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 19:33:38,901 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 19:33:38,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:38,993 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-07 19:33:38,998 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:33:39,045 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 19:33:39,221 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-07 19:33:39,222 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 32 treesize of output 27 [2024-11-07 19:33:39,257 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:39,257 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:33:39,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:39,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476832022] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-07 19:33:39,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-07 19:33:39,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 10 [2024-11-07 19:33:39,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841030334] [2024-11-07 19:33:39,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:39,353 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:33:39,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:39,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:33:39,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-07 19:33:39,431 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-11-07 19:33:39,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 58 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:39,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:39,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-11-07 19:33:39,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:39,788 INFO L124 PetriNetUnfolderBase]: 611/1156 cut-off events. [2024-11-07 19:33:39,788 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-07 19:33:39,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2117 conditions, 1156 events. 611/1156 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5957 event pairs, 404 based on Foata normal form. 2/1011 useless extension candidates. Maximal degree in co-relation 1025. Up to 453 conditions per place. [2024-11-07 19:33:39,798 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 57 selfloop transitions, 9 changer transitions 0/83 dead transitions. [2024-11-07 19:33:39,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 83 transitions, 363 flow [2024-11-07 19:33:39,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:33:39,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:33:39,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 187 transitions. [2024-11-07 19:33:39,803 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6233333333333333 [2024-11-07 19:33:39,803 INFO L175 Difference]: Start difference. First operand has 53 places, 58 transitions, 168 flow. Second operand 5 states and 187 transitions. [2024-11-07 19:33:39,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 83 transitions, 363 flow [2024-11-07 19:33:39,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 83 transitions, 363 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-07 19:33:39,807 INFO L231 Difference]: Finished difference. Result has 58 places, 59 transitions, 201 flow [2024-11-07 19:33:39,807 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=201, PETRI_PLACES=58, PETRI_TRANSITIONS=59} [2024-11-07 19:33:39,808 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -2 predicate places. [2024-11-07 19:33:39,808 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 59 transitions, 201 flow [2024-11-07 19:33:39,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:39,809 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:39,809 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:39,828 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 19:33:40,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:40,014 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-07 19:33:40,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:40,014 INFO L85 PathProgramCache]: Analyzing trace with hash 672095073, now seen corresponding path program 1 times [2024-11-07 19:33:40,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:40,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083394747] [2024-11-07 19:33:40,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:40,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:40,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:40,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:40,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:40,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083394747] [2024-11-07 19:33:40,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083394747] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:33:40,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586591195] [2024-11-07 19:33:40,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:40,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:40,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:33:40,178 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 19:33:40,182 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 19:33:40,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:40,259 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-07 19:33:40,261 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:33:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:40,354 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:33:40,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:40,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586591195] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:33:40,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:33:40,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-07 19:33:40,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710267183] [2024-11-07 19:33:40,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:33:40,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-07 19:33:40,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:40,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-07 19:33:40,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-07 19:33:40,542 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2024-11-07 19:33:40,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 59 transitions, 201 flow. Second operand has 13 states, 13 states have (on average 28.53846153846154) internal successors, (371), 13 states have internal predecessors, (371), 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 19:33:40,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:40,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2024-11-07 19:33:40,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:41,016 INFO L124 PetriNetUnfolderBase]: 918/1741 cut-off events. [2024-11-07 19:33:41,016 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-11-07 19:33:41,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3217 conditions, 1741 events. 918/1741 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 8759 event pairs, 606 based on Foata normal form. 2/1519 useless extension candidates. Maximal degree in co-relation 1051. Up to 884 conditions per place. [2024-11-07 19:33:41,030 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 52 selfloop transitions, 29 changer transitions 0/100 dead transitions. [2024-11-07 19:33:41,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 100 transitions, 513 flow [2024-11-07 19:33:41,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:33:41,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:33:41,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 325 transitions. [2024-11-07 19:33:41,032 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6018518518518519 [2024-11-07 19:33:41,032 INFO L175 Difference]: Start difference. First operand has 58 places, 59 transitions, 201 flow. Second operand 9 states and 325 transitions. [2024-11-07 19:33:41,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 100 transitions, 513 flow [2024-11-07 19:33:41,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 100 transitions, 511 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:33:41,037 INFO L231 Difference]: Finished difference. Result has 67 places, 74 transitions, 369 flow [2024-11-07 19:33:41,038 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=369, PETRI_PLACES=67, PETRI_TRANSITIONS=74} [2024-11-07 19:33:41,039 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 7 predicate places. [2024-11-07 19:33:41,040 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 74 transitions, 369 flow [2024-11-07 19:33:41,040 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 28.53846153846154) internal successors, (371), 13 states have internal predecessors, (371), 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 19:33:41,040 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:41,041 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:41,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-07 19:33:41,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:41,241 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-07 19:33:41,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:41,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1148794552, now seen corresponding path program 1 times [2024-11-07 19:33:41,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:41,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69945898] [2024-11-07 19:33:41,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:41,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:41,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:41,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:41,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69945898] [2024-11-07 19:33:41,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69945898] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:41,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:41,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:33:41,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176276502] [2024-11-07 19:33:41,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:41,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:33:41,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:41,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:33:41,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:33:41,357 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-07 19:33:41,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 74 transitions, 369 flow. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 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 19:33:41,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:41,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-07 19:33:41,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:41,762 INFO L124 PetriNetUnfolderBase]: 1322/2481 cut-off events. [2024-11-07 19:33:41,763 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2024-11-07 19:33:41,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4647 conditions, 2481 events. 1322/2481 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 13718 event pairs, 808 based on Foata normal form. 0/2109 useless extension candidates. Maximal degree in co-relation 1871. Up to 1153 conditions per place. [2024-11-07 19:33:41,783 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 72 selfloop transitions, 20 changer transitions 0/110 dead transitions. [2024-11-07 19:33:41,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 110 transitions, 647 flow [2024-11-07 19:33:41,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:33:41,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:33:41,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 233 transitions. [2024-11-07 19:33:41,785 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6472222222222223 [2024-11-07 19:33:41,785 INFO L175 Difference]: Start difference. First operand has 67 places, 74 transitions, 369 flow. Second operand 6 states and 233 transitions. [2024-11-07 19:33:41,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 110 transitions, 647 flow [2024-11-07 19:33:41,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 110 transitions, 573 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-11-07 19:33:41,790 INFO L231 Difference]: Finished difference. Result has 70 places, 76 transitions, 353 flow [2024-11-07 19:33:41,790 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=353, PETRI_PLACES=70, PETRI_TRANSITIONS=76} [2024-11-07 19:33:41,791 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 10 predicate places. [2024-11-07 19:33:41,791 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 76 transitions, 353 flow [2024-11-07 19:33:41,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 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 19:33:41,791 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:41,791 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-07 19:33:41,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-07 19:33:41,791 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-07 19:33:41,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:41,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1219944564, now seen corresponding path program 2 times [2024-11-07 19:33:41,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:41,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872102151] [2024-11-07 19:33:41,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:41,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:41,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:42,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:42,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:42,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872102151] [2024-11-07 19:33:42,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872102151] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:33:42,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765084915] [2024-11-07 19:33:42,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:33:42,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:42,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:33:42,090 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 19:33:42,092 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 19:33:42,170 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:33:42,170 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:33:42,172 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-07 19:33:42,173 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:33:42,182 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 19:33:42,335 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-07 19:33:42,335 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 23 treesize of output 20 [2024-11-07 19:33:42,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:42,466 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:33:42,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:42,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765084915] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:33:42,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:33:42,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 19 [2024-11-07 19:33:42,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013150861] [2024-11-07 19:33:42,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:33:42,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-07 19:33:42,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:42,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-07 19:33:42,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2024-11-07 19:33:43,820 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-11-07 19:33:43,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 76 transitions, 353 flow. Second operand has 21 states, 21 states have (on average 25.428571428571427) internal successors, (534), 21 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:43,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:43,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-11-07 19:33:43,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:45,582 INFO L124 PetriNetUnfolderBase]: 1474/2962 cut-off events. [2024-11-07 19:33:45,582 INFO L125 PetriNetUnfolderBase]: For 742/791 co-relation queries the response was YES. [2024-11-07 19:33:45,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6185 conditions, 2962 events. 1474/2962 cut-off events. For 742/791 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 16957 event pairs, 1010 based on Foata normal form. 18/2597 useless extension candidates. Maximal degree in co-relation 2640. Up to 1703 conditions per place. [2024-11-07 19:33:45,604 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 74 selfloop transitions, 104 changer transitions 0/195 dead transitions. [2024-11-07 19:33:45,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 195 transitions, 1358 flow [2024-11-07 19:33:45,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-07 19:33:45,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-07 19:33:45,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 809 transitions. [2024-11-07 19:33:45,608 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5185897435897436 [2024-11-07 19:33:45,609 INFO L175 Difference]: Start difference. First operand has 70 places, 76 transitions, 353 flow. Second operand 26 states and 809 transitions. [2024-11-07 19:33:45,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 195 transitions, 1358 flow [2024-11-07 19:33:45,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 195 transitions, 1285 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:33:45,622 INFO L231 Difference]: Finished difference. Result has 104 places, 162 transitions, 1180 flow [2024-11-07 19:33:45,623 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1180, PETRI_PLACES=104, PETRI_TRANSITIONS=162} [2024-11-07 19:33:45,624 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 44 predicate places. [2024-11-07 19:33:45,626 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 162 transitions, 1180 flow [2024-11-07 19:33:45,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 25.428571428571427) internal successors, (534), 21 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:45,627 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:45,627 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:45,644 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 19:33:45,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:45,829 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-07 19:33:45,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:45,829 INFO L85 PathProgramCache]: Analyzing trace with hash 183154492, now seen corresponding path program 1 times [2024-11-07 19:33:45,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:45,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078016427] [2024-11-07 19:33:45,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:45,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:45,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:45,933 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 19:33:45,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:45,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078016427] [2024-11-07 19:33:45,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078016427] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:45,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:45,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:33:45,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640956358] [2024-11-07 19:33:45,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:45,935 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:33:45,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:45,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:33:45,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:33:45,953 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-07 19:33:45,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 162 transitions, 1180 flow. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 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 19:33:45,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:45,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-07 19:33:45,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:46,409 INFO L124 PetriNetUnfolderBase]: 1683/3289 cut-off events. [2024-11-07 19:33:46,409 INFO L125 PetriNetUnfolderBase]: For 1256/1400 co-relation queries the response was YES. [2024-11-07 19:33:46,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7083 conditions, 3289 events. 1683/3289 cut-off events. For 1256/1400 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 18707 event pairs, 1058 based on Foata normal form. 0/2753 useless extension candidates. Maximal degree in co-relation 6952. Up to 1818 conditions per place. [2024-11-07 19:33:46,435 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 133 selfloop transitions, 41 changer transitions 0/192 dead transitions. [2024-11-07 19:33:46,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 192 transitions, 1628 flow [2024-11-07 19:33:46,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:33:46,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:33:46,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 230 transitions. [2024-11-07 19:33:46,440 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-11-07 19:33:46,440 INFO L175 Difference]: Start difference. First operand has 104 places, 162 transitions, 1180 flow. Second operand 6 states and 230 transitions. [2024-11-07 19:33:46,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 192 transitions, 1628 flow [2024-11-07 19:33:46,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 192 transitions, 1582 flow, removed 23 selfloop flow, removed 0 redundant places. [2024-11-07 19:33:46,457 INFO L231 Difference]: Finished difference. Result has 111 places, 164 transitions, 1235 flow [2024-11-07 19:33:46,458 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1235, PETRI_PLACES=111, PETRI_TRANSITIONS=164} [2024-11-07 19:33:46,460 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 51 predicate places. [2024-11-07 19:33:46,461 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 164 transitions, 1235 flow [2024-11-07 19:33:46,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 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 19:33:46,461 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:46,462 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:46,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-07 19:33:46,462 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-07 19:33:46,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:46,462 INFO L85 PathProgramCache]: Analyzing trace with hash -99082247, now seen corresponding path program 1 times [2024-11-07 19:33:46,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:46,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976769137] [2024-11-07 19:33:46,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:46,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:46,549 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 19:33:46,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:46,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976769137] [2024-11-07 19:33:46,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976769137] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:46,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:46,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:33:46,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589064446] [2024-11-07 19:33:46,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:46,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:33:46,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:46,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:33:46,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:33:46,590 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-07 19:33:46,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 164 transitions, 1235 flow. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 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 19:33:46,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:46,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-07 19:33:46,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:47,023 INFO L124 PetriNetUnfolderBase]: 1348/2652 cut-off events. [2024-11-07 19:33:47,024 INFO L125 PetriNetUnfolderBase]: For 1720/1972 co-relation queries the response was YES. [2024-11-07 19:33:47,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6353 conditions, 2652 events. 1348/2652 cut-off events. For 1720/1972 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 14098 event pairs, 893 based on Foata normal form. 0/2279 useless extension candidates. Maximal degree in co-relation 6219. Up to 1626 conditions per place. [2024-11-07 19:33:47,051 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 126 selfloop transitions, 41 changer transitions 0/185 dead transitions. [2024-11-07 19:33:47,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 185 transitions, 1659 flow [2024-11-07 19:33:47,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:33:47,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:33:47,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 223 transitions. [2024-11-07 19:33:47,053 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6194444444444445 [2024-11-07 19:33:47,053 INFO L175 Difference]: Start difference. First operand has 111 places, 164 transitions, 1235 flow. Second operand 6 states and 223 transitions. [2024-11-07 19:33:47,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 185 transitions, 1659 flow [2024-11-07 19:33:47,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 185 transitions, 1570 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-11-07 19:33:47,071 INFO L231 Difference]: Finished difference. Result has 115 places, 166 transitions, 1255 flow [2024-11-07 19:33:47,073 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1154, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1255, PETRI_PLACES=115, PETRI_TRANSITIONS=166} [2024-11-07 19:33:47,074 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 55 predicate places. [2024-11-07 19:33:47,074 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 166 transitions, 1255 flow [2024-11-07 19:33:47,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 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 19:33:47,074 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:47,075 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:47,075 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-07 19:33:47,075 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-07 19:33:47,076 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:47,077 INFO L85 PathProgramCache]: Analyzing trace with hash 379331070, now seen corresponding path program 1 times [2024-11-07 19:33:47,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:47,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047906335] [2024-11-07 19:33:47,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:47,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:47,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:47,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:33:47,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:47,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047906335] [2024-11-07 19:33:47,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047906335] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:33:47,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638254889] [2024-11-07 19:33:47,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:47,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:47,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:33:47,517 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 19:33:47,530 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 19:33:47,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:47,616 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-07 19:33:47,618 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:33:47,625 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 19:33:47,637 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 19:33:47,685 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-07 19:33:47,685 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-07 19:33:47,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2024-11-07 19:33:47,844 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-07 19:33:47,845 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 19:33:47,866 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-07 19:33:47,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 36 [2024-11-07 19:33:47,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:33:47,980 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:33:48,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:33:48,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638254889] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-07 19:33:48,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-07 19:33:48,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 15 [2024-11-07 19:33:48,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123416016] [2024-11-07 19:33:48,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:48,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-07 19:33:48,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:48,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-07 19:33:48,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-11-07 19:33:48,860 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-11-07 19:33:48,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 166 transitions, 1255 flow. Second operand has 7 states, 7 states have (on average 26.857142857142858) internal successors, (188), 7 states have internal predecessors, (188), 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 19:33:48,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:48,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-11-07 19:33:48,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:49,851 INFO L124 PetriNetUnfolderBase]: 2227/4399 cut-off events. [2024-11-07 19:33:49,851 INFO L125 PetriNetUnfolderBase]: For 2425/2749 co-relation queries the response was YES. [2024-11-07 19:33:49,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10564 conditions, 4399 events. 2227/4399 cut-off events. For 2425/2749 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 27245 event pairs, 1164 based on Foata normal form. 0/3894 useless extension candidates. Maximal degree in co-relation 10428. Up to 2277 conditions per place. [2024-11-07 19:33:49,885 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 132 selfloop transitions, 54 changer transitions 0/203 dead transitions. [2024-11-07 19:33:49,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 203 transitions, 1767 flow [2024-11-07 19:33:49,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-07 19:33:49,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-07 19:33:49,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 270 transitions. [2024-11-07 19:33:49,887 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-11-07 19:33:49,887 INFO L175 Difference]: Start difference. First operand has 115 places, 166 transitions, 1255 flow. Second operand 8 states and 270 transitions. [2024-11-07 19:33:49,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 203 transitions, 1767 flow [2024-11-07 19:33:49,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 203 transitions, 1694 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:33:49,906 INFO L231 Difference]: Finished difference. Result has 121 places, 170 transitions, 1345 flow [2024-11-07 19:33:49,906 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1182, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1345, PETRI_PLACES=121, PETRI_TRANSITIONS=170} [2024-11-07 19:33:49,907 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 61 predicate places. [2024-11-07 19:33:49,907 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 170 transitions, 1345 flow [2024-11-07 19:33:49,908 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.857142857142858) internal successors, (188), 7 states have internal predecessors, (188), 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 19:33:49,908 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:49,908 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:49,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-07 19:33:50,108 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,SelfDestructingSolverStorable9 [2024-11-07 19:33:50,108 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-07 19:33:50,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:50,110 INFO L85 PathProgramCache]: Analyzing trace with hash 379331069, now seen corresponding path program 1 times [2024-11-07 19:33:50,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:50,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629035218] [2024-11-07 19:33:50,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:50,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:50,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:50,263 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:33:50,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:50,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629035218] [2024-11-07 19:33:50,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629035218] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:50,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:50,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:33:50,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509562670] [2024-11-07 19:33:50,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:50,265 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:33:50,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:50,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:33:50,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:33:50,321 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-11-07 19:33:50,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 170 transitions, 1345 flow. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:50,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:50,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-11-07 19:33:50,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:50,722 INFO L124 PetriNetUnfolderBase]: 1915/3772 cut-off events. [2024-11-07 19:33:50,722 INFO L125 PetriNetUnfolderBase]: For 5014/5569 co-relation queries the response was YES. [2024-11-07 19:33:50,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10600 conditions, 3772 events. 1915/3772 cut-off events. For 5014/5569 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 22338 event pairs, 1347 based on Foata normal form. 264/3733 useless extension candidates. Maximal degree in co-relation 10462. Up to 2782 conditions per place. [2024-11-07 19:33:50,745 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 125 selfloop transitions, 27 changer transitions 0/168 dead transitions. [2024-11-07 19:33:50,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 168 transitions, 1645 flow [2024-11-07 19:33:50,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:33:50,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:33:50,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 139 transitions. [2024-11-07 19:33:50,747 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4633333333333333 [2024-11-07 19:33:50,747 INFO L175 Difference]: Start difference. First operand has 121 places, 170 transitions, 1345 flow. Second operand 5 states and 139 transitions. [2024-11-07 19:33:50,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 168 transitions, 1645 flow [2024-11-07 19:33:50,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 168 transitions, 1609 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:33:50,761 INFO L231 Difference]: Finished difference. Result has 121 places, 168 transitions, 1359 flow [2024-11-07 19:33:50,762 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1305, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1359, PETRI_PLACES=121, PETRI_TRANSITIONS=168} [2024-11-07 19:33:50,762 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 61 predicate places. [2024-11-07 19:33:50,762 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 168 transitions, 1359 flow [2024-11-07 19:33:50,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:50,763 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:50,763 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:50,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-07 19:33:50,763 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-07 19:33:50,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:50,763 INFO L85 PathProgramCache]: Analyzing trace with hash -536877759, now seen corresponding path program 1 times [2024-11-07 19:33:50,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:50,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052627287] [2024-11-07 19:33:50,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:50,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:50,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:51,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:33:51,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:51,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052627287] [2024-11-07 19:33:51,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052627287] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:33:51,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30967602] [2024-11-07 19:33:51,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:51,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:51,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:33:51,026 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 19:33:51,027 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 19:33:51,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:51,116 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-07 19:33:51,118 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:33:51,124 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 19:33:51,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-07 19:33:51,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-07 19:33:51,176 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-07 19:33:51,177 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 19:33:51,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:33:51,231 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:33:51,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-07 19:33:51,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:33:51,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30967602] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:33:51,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:33:51,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-07 19:33:51,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997671037] [2024-11-07 19:33:51,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:33:51,395 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-07 19:33:51,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:51,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-07 19:33:51,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-07 19:33:51,924 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-11-07 19:33:51,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 168 transitions, 1359 flow. Second operand has 13 states, 13 states have (on average 25.53846153846154) internal successors, (332), 13 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:51,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:51,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-11-07 19:33:51,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:52,905 INFO L124 PetriNetUnfolderBase]: 2560/4995 cut-off events. [2024-11-07 19:33:52,905 INFO L125 PetriNetUnfolderBase]: For 5686/6493 co-relation queries the response was YES. [2024-11-07 19:33:52,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13219 conditions, 4995 events. 2560/4995 cut-off events. For 5686/6493 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 31876 event pairs, 1334 based on Foata normal form. 0/4407 useless extension candidates. Maximal degree in co-relation 13081. Up to 2702 conditions per place. [2024-11-07 19:33:52,941 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 134 selfloop transitions, 54 changer transitions 0/204 dead transitions. [2024-11-07 19:33:52,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 204 transitions, 1899 flow [2024-11-07 19:33:52,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-07 19:33:52,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-07 19:33:52,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 257 transitions. [2024-11-07 19:33:52,943 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5354166666666667 [2024-11-07 19:33:52,943 INFO L175 Difference]: Start difference. First operand has 121 places, 168 transitions, 1359 flow. Second operand 8 states and 257 transitions. [2024-11-07 19:33:52,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 204 transitions, 1899 flow [2024-11-07 19:33:52,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 204 transitions, 1864 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:33:52,960 INFO L231 Difference]: Finished difference. Result has 127 places, 172 transitions, 1487 flow [2024-11-07 19:33:52,960 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1324, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1487, PETRI_PLACES=127, PETRI_TRANSITIONS=172} [2024-11-07 19:33:52,961 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 67 predicate places. [2024-11-07 19:33:52,961 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 172 transitions, 1487 flow [2024-11-07 19:33:52,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 25.53846153846154) internal successors, (332), 13 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:52,961 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:52,961 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:52,978 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 19:33:53,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-07 19:33:53,162 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-07 19:33:53,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:53,163 INFO L85 PathProgramCache]: Analyzing trace with hash -536877760, now seen corresponding path program 1 times [2024-11-07 19:33:53,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:53,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666306733] [2024-11-07 19:33:53,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:53,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:53,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:33:53,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:53,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666306733] [2024-11-07 19:33:53,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666306733] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:53,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:53,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:33:53,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84061308] [2024-11-07 19:33:53,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:53,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:33:53,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:53,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:33:53,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:33:53,314 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-11-07 19:33:53,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 172 transitions, 1487 flow. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 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 19:33:53,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:53,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-11-07 19:33:53,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:53,768 INFO L124 PetriNetUnfolderBase]: 2146/4194 cut-off events. [2024-11-07 19:33:53,769 INFO L125 PetriNetUnfolderBase]: For 7820/8690 co-relation queries the response was YES. [2024-11-07 19:33:53,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12857 conditions, 4194 events. 2146/4194 cut-off events. For 7820/8690 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 25799 event pairs, 1382 based on Foata normal form. 318/4182 useless extension candidates. Maximal degree in co-relation 12717. Up to 2995 conditions per place. [2024-11-07 19:33:53,809 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 117 selfloop transitions, 38 changer transitions 0/170 dead transitions. [2024-11-07 19:33:53,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 170 transitions, 1793 flow [2024-11-07 19:33:53,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:33:53,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:33:53,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-11-07 19:33:53,811 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4766666666666667 [2024-11-07 19:33:53,811 INFO L175 Difference]: Start difference. First operand has 127 places, 172 transitions, 1487 flow. Second operand 5 states and 143 transitions. [2024-11-07 19:33:53,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 170 transitions, 1793 flow [2024-11-07 19:33:53,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 170 transitions, 1745 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:33:53,827 INFO L231 Difference]: Finished difference. Result has 126 places, 170 transitions, 1511 flow [2024-11-07 19:33:53,827 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1435, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1511, PETRI_PLACES=126, PETRI_TRANSITIONS=170} [2024-11-07 19:33:53,828 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 66 predicate places. [2024-11-07 19:33:53,829 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 170 transitions, 1511 flow [2024-11-07 19:33:53,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 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 19:33:53,829 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:53,829 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:53,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-07 19:33:53,829 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-07 19:33:53,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:53,829 INFO L85 PathProgramCache]: Analyzing trace with hash -535031870, now seen corresponding path program 1 times [2024-11-07 19:33:53,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:53,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585979720] [2024-11-07 19:33:53,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:53,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:53,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:53,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:33:53,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:53,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585979720] [2024-11-07 19:33:53,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585979720] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:33:53,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062520400] [2024-11-07 19:33:53,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:53,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:53,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:33:53,943 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 19:33:53,944 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 19:33:54,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:54,035 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-07 19:33:54,036 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:33:54,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:33:54,094 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:33:54,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:33:54,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062520400] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:33:54,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:33:54,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-07 19:33:54,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868378360] [2024-11-07 19:33:54,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:33:54,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-07 19:33:54,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:54,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-07 19:33:54,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-07 19:33:54,253 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-07 19:33:54,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 170 transitions, 1511 flow. Second operand has 14 states, 14 states have (on average 28.142857142857142) internal successors, (394), 14 states have internal predecessors, (394), 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 19:33:54,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:54,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-07 19:33:54,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:54,881 INFO L124 PetriNetUnfolderBase]: 2746/4982 cut-off events. [2024-11-07 19:33:54,881 INFO L125 PetriNetUnfolderBase]: For 8884/9730 co-relation queries the response was YES. [2024-11-07 19:33:54,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15345 conditions, 4982 events. 2746/4982 cut-off events. For 8884/9730 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 28936 event pairs, 1488 based on Foata normal form. 50/4658 useless extension candidates. Maximal degree in co-relation 15205. Up to 2457 conditions per place. [2024-11-07 19:33:54,918 INFO L140 encePairwiseOnDemand]: 46/60 looper letters, 116 selfloop transitions, 105 changer transitions 0/235 dead transitions. [2024-11-07 19:33:54,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 235 transitions, 2255 flow [2024-11-07 19:33:54,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-07 19:33:54,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-07 19:33:54,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 368 transitions. [2024-11-07 19:33:54,920 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6133333333333333 [2024-11-07 19:33:54,920 INFO L175 Difference]: Start difference. First operand has 126 places, 170 transitions, 1511 flow. Second operand 10 states and 368 transitions. [2024-11-07 19:33:54,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 235 transitions, 2255 flow [2024-11-07 19:33:54,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 235 transitions, 2198 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:33:54,941 INFO L231 Difference]: Finished difference. Result has 135 places, 174 transitions, 1726 flow [2024-11-07 19:33:54,941 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1454, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1726, PETRI_PLACES=135, PETRI_TRANSITIONS=174} [2024-11-07 19:33:54,941 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 75 predicate places. [2024-11-07 19:33:54,942 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 174 transitions, 1726 flow [2024-11-07 19:33:54,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 28.142857142857142) internal successors, (394), 14 states have internal predecessors, (394), 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 19:33:54,942 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:54,942 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 2, 1, 1, 1, 1] [2024-11-07 19:33:54,958 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 19:33:55,146 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,SelfDestructingSolverStorable13 [2024-11-07 19:33:55,147 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-07 19:33:55,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:55,147 INFO L85 PathProgramCache]: Analyzing trace with hash 262610240, now seen corresponding path program 3 times [2024-11-07 19:33:55,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:55,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369094715] [2024-11-07 19:33:55,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:55,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:55,545 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:55,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:55,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369094715] [2024-11-07 19:33:55,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369094715] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:33:55,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48147358] [2024-11-07 19:33:55,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-07 19:33:55,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:55,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:33:55,548 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 19:33:55,550 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 19:33:55,633 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-07 19:33:55,633 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:33:55,634 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-07 19:33:55,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:33:55,650 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 19:33:55,800 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-07 19:33:55,801 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 25 treesize of output 22 [2024-11-07 19:33:55,912 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-07 19:33:55,912 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:33:56,167 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-07 19:33:56,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48147358] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:33:56,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:33:56,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 21 [2024-11-07 19:33:56,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509546964] [2024-11-07 19:33:56,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:33:56,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-07 19:33:56,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:56,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-07 19:33:56,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-11-07 19:33:57,157 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-11-07 19:33:57,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 174 transitions, 1726 flow. Second operand has 23 states, 23 states have (on average 25.565217391304348) internal successors, (588), 23 states have internal predecessors, (588), 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 19:33:57,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:57,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-11-07 19:33:57,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:58,679 INFO L124 PetriNetUnfolderBase]: 2109/4016 cut-off events. [2024-11-07 19:33:58,680 INFO L125 PetriNetUnfolderBase]: For 11805/12493 co-relation queries the response was YES. [2024-11-07 19:33:58,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14362 conditions, 4016 events. 2109/4016 cut-off events. For 11805/12493 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 23896 event pairs, 1382 based on Foata normal form. 30/3814 useless extension candidates. Maximal degree in co-relation 13936. Up to 2952 conditions per place. [2024-11-07 19:33:58,714 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 101 selfloop transitions, 152 changer transitions 0/266 dead transitions. [2024-11-07 19:33:58,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 266 transitions, 3244 flow [2024-11-07 19:33:58,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-07 19:33:58,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-07 19:33:58,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 658 transitions. [2024-11-07 19:33:58,717 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5222222222222223 [2024-11-07 19:33:58,717 INFO L175 Difference]: Start difference. First operand has 135 places, 174 transitions, 1726 flow. Second operand 21 states and 658 transitions. [2024-11-07 19:33:58,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 266 transitions, 3244 flow [2024-11-07 19:33:58,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 266 transitions, 2890 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-11-07 19:33:58,747 INFO L231 Difference]: Finished difference. Result has 159 places, 240 transitions, 2638 flow [2024-11-07 19:33:58,748 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1503, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2638, PETRI_PLACES=159, PETRI_TRANSITIONS=240} [2024-11-07 19:33:58,748 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 99 predicate places. [2024-11-07 19:33:58,748 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 240 transitions, 2638 flow [2024-11-07 19:33:58,749 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 25.565217391304348) internal successors, (588), 23 states have internal predecessors, (588), 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 19:33:58,749 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:58,749 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:58,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-07 19:33:58,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:58,954 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-07 19:33:58,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:58,954 INFO L85 PathProgramCache]: Analyzing trace with hash -560340801, now seen corresponding path program 1 times [2024-11-07 19:33:58,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:58,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072503431] [2024-11-07 19:33:58,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:58,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:58,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:59,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:33:59,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:59,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072503431] [2024-11-07 19:33:59,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072503431] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:33:59,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151538478] [2024-11-07 19:33:59,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:59,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:59,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:33:59,260 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 19:33:59,262 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 19:33:59,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:59,353 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-07 19:33:59,355 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:33:59,362 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 19:33:59,368 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 19:33:59,426 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-07 19:33:59,426 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-07 19:33:59,445 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2024-11-07 19:33:59,559 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-07 19:33:59,559 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 19:33:59,570 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-07 19:33:59,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 36 [2024-11-07 19:33:59,651 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:33:59,651 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:33:59,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:33:59,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151538478] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-07 19:33:59,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-07 19:33:59,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 16 [2024-11-07 19:33:59,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142364861] [2024-11-07 19:33:59,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:59,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-07 19:33:59,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:59,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-07 19:33:59,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-11-07 19:34:00,308 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-11-07 19:34:00,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 240 transitions, 2638 flow. Second operand has 7 states, 7 states have (on average 27.428571428571427) internal successors, (192), 7 states have internal predecessors, (192), 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 19:34:00,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:34:00,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-11-07 19:34:00,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:34:01,167 INFO L124 PetriNetUnfolderBase]: 3150/5546 cut-off events. [2024-11-07 19:34:01,167 INFO L125 PetriNetUnfolderBase]: For 16092/17405 co-relation queries the response was YES. [2024-11-07 19:34:01,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19404 conditions, 5546 events. 3150/5546 cut-off events. For 16092/17405 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 32269 event pairs, 1127 based on Foata normal form. 0/5200 useless extension candidates. Maximal degree in co-relation 19017. Up to 2252 conditions per place. [2024-11-07 19:34:01,283 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 193 selfloop transitions, 69 changer transitions 0/275 dead transitions. [2024-11-07 19:34:01,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 275 transitions, 3372 flow [2024-11-07 19:34:01,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-07 19:34:01,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-07 19:34:01,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 265 transitions. [2024-11-07 19:34:01,284 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5520833333333334 [2024-11-07 19:34:01,284 INFO L175 Difference]: Start difference. First operand has 159 places, 240 transitions, 2638 flow. Second operand 8 states and 265 transitions. [2024-11-07 19:34:01,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 275 transitions, 3372 flow [2024-11-07 19:34:01,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 275 transitions, 3315 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-11-07 19:34:01,321 INFO L231 Difference]: Finished difference. Result has 164 places, 244 transitions, 2783 flow [2024-11-07 19:34:01,322 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2581, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2783, PETRI_PLACES=164, PETRI_TRANSITIONS=244} [2024-11-07 19:34:01,322 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 104 predicate places. [2024-11-07 19:34:01,322 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 244 transitions, 2783 flow [2024-11-07 19:34:01,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.428571428571427) internal successors, (192), 7 states have internal predecessors, (192), 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 19:34:01,323 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:34:01,323 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:34:01,340 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 19:34:01,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-07 19:34:01,527 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-07 19:34:01,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:34:01,528 INFO L85 PathProgramCache]: Analyzing trace with hash -543420667, now seen corresponding path program 1 times [2024-11-07 19:34:01,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:34:01,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557406029] [2024-11-07 19:34:01,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:34:01,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:34:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:34:01,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:34:01,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:34:01,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557406029] [2024-11-07 19:34:01,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557406029] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:34:01,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104741943] [2024-11-07 19:34:01,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:34:01,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:34:01,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:34:01,636 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 19:34:01,638 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 19:34:01,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:34:01,736 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-07 19:34:01,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:34:01,806 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:34:01,807 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:34:01,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:34:01,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104741943] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:34:01,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:34:01,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-07 19:34:01,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447715970] [2024-11-07 19:34:01,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:34:01,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-07 19:34:01,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:34:01,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-07 19:34:01,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-07 19:34:01,959 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-07 19:34:01,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 244 transitions, 2783 flow. Second operand has 14 states, 14 states have (on average 28.285714285714285) internal successors, (396), 14 states have internal predecessors, (396), 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 19:34:01,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:34:01,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-07 19:34:01,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:34:02,719 INFO L124 PetriNetUnfolderBase]: 3282/5883 cut-off events. [2024-11-07 19:34:02,719 INFO L125 PetriNetUnfolderBase]: For 16937/18091 co-relation queries the response was YES. [2024-11-07 19:34:02,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21334 conditions, 5883 events. 3282/5883 cut-off events. For 16937/18091 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 34314 event pairs, 1752 based on Foata normal form. 62/5680 useless extension candidates. Maximal degree in co-relation 20974. Up to 2972 conditions per place. [2024-11-07 19:34:02,777 INFO L140 encePairwiseOnDemand]: 46/60 looper letters, 130 selfloop transitions, 159 changer transitions 0/304 dead transitions. [2024-11-07 19:34:02,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 304 transitions, 3731 flow [2024-11-07 19:34:02,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-07 19:34:02,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-07 19:34:02,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 366 transitions. [2024-11-07 19:34:02,779 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-11-07 19:34:02,779 INFO L175 Difference]: Start difference. First operand has 164 places, 244 transitions, 2783 flow. Second operand 10 states and 366 transitions. [2024-11-07 19:34:02,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 304 transitions, 3731 flow [2024-11-07 19:34:02,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 304 transitions, 3623 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-07 19:34:02,813 INFO L231 Difference]: Finished difference. Result has 171 places, 248 transitions, 3057 flow [2024-11-07 19:34:02,813 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2677, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3057, PETRI_PLACES=171, PETRI_TRANSITIONS=248} [2024-11-07 19:34:02,814 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 111 predicate places. [2024-11-07 19:34:02,814 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 248 transitions, 3057 flow [2024-11-07 19:34:02,814 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 28.285714285714285) internal successors, (396), 14 states have internal predecessors, (396), 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 19:34:02,814 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:34:02,814 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:34:02,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-07 19:34:03,014 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:34:03,015 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-07 19:34:03,015 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:34:03,015 INFO L85 PathProgramCache]: Analyzing trace with hash -190694783, now seen corresponding path program 1 times [2024-11-07 19:34:03,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:34:03,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806487492] [2024-11-07 19:34:03,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:34:03,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:34:03,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:34:03,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:34:03,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:34:03,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806487492] [2024-11-07 19:34:03,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806487492] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:34:03,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547751042] [2024-11-07 19:34:03,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:34:03,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:34:03,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:34:03,167 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 19:34:03,169 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 19:34:03,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:34:03,269 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-07 19:34:03,270 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:34:03,274 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 19:34:03,278 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 19:34:03,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-07 19:34:03,313 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-07 19:34:03,320 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-07 19:34:03,321 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 19:34:03,376 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:34:03,376 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:34:03,527 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:34:03,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547751042] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-07 19:34:03,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-07 19:34:03,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 12 [2024-11-07 19:34:03,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835706612] [2024-11-07 19:34:03,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:34:03,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-07 19:34:03,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:34:03,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-07 19:34:03,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-11-07 19:34:03,698 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-07 19:34:03,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 248 transitions, 3057 flow. Second operand has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 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 19:34:03,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:34:03,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-07 19:34:03,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:34:04,366 INFO L124 PetriNetUnfolderBase]: 2769/5161 cut-off events. [2024-11-07 19:34:04,366 INFO L125 PetriNetUnfolderBase]: For 20257/21534 co-relation queries the response was YES. [2024-11-07 19:34:04,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20526 conditions, 5161 events. 2769/5161 cut-off events. For 20257/21534 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 31318 event pairs, 1127 based on Foata normal form. 62/4876 useless extension candidates. Maximal degree in co-relation 20135. Up to 2208 conditions per place. [2024-11-07 19:34:04,402 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 197 selfloop transitions, 73 changer transitions 0/285 dead transitions. [2024-11-07 19:34:04,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 285 transitions, 3863 flow [2024-11-07 19:34:04,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-07 19:34:04,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-07 19:34:04,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 278 transitions. [2024-11-07 19:34:04,403 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-11-07 19:34:04,404 INFO L175 Difference]: Start difference. First operand has 171 places, 248 transitions, 3057 flow. Second operand 8 states and 278 transitions. [2024-11-07 19:34:04,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 285 transitions, 3863 flow [2024-11-07 19:34:04,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 285 transitions, 3596 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-07 19:34:04,449 INFO L231 Difference]: Finished difference. Result has 175 places, 249 transitions, 2984 flow [2024-11-07 19:34:04,450 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2796, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2984, PETRI_PLACES=175, PETRI_TRANSITIONS=249} [2024-11-07 19:34:04,450 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 115 predicate places. [2024-11-07 19:34:04,450 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 249 transitions, 2984 flow [2024-11-07 19:34:04,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 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 19:34:04,451 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:34:04,451 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:34:04,463 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 19:34:04,651 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 19:34:04,651 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-07 19:34:04,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:34:04,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1616570017, now seen corresponding path program 1 times [2024-11-07 19:34:04,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:34:04,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845107988] [2024-11-07 19:34:04,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:34:04,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:34:04,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:34:04,825 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:34:04,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:34:04,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845107988] [2024-11-07 19:34:04,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845107988] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:34:04,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098914389] [2024-11-07 19:34:04,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:34:04,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:34:04,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:34:04,828 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 19:34:04,831 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 19:34:04,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:34:04,929 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-07 19:34:04,931 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:34:04,940 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 19:34:05,009 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-07 19:34:05,010 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 32 treesize of output 27 [2024-11-07 19:34:05,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:34:05,078 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:34:05,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:34:05,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098914389] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-07 19:34:05,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-07 19:34:05,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 13 [2024-11-07 19:34:05,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381245136] [2024-11-07 19:34:05,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:34:05,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-07 19:34:05,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:34:05,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-07 19:34:05,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-11-07 19:34:05,310 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-11-07 19:34:05,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 249 transitions, 2984 flow. Second operand has 7 states, 7 states have (on average 27.571428571428573) internal successors, (193), 7 states have internal predecessors, (193), 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 19:34:05,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:34:05,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-11-07 19:34:05,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:34:06,121 INFO L124 PetriNetUnfolderBase]: 3193/5635 cut-off events. [2024-11-07 19:34:06,121 INFO L125 PetriNetUnfolderBase]: For 25086/26449 co-relation queries the response was YES. [2024-11-07 19:34:06,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23816 conditions, 5635 events. 3193/5635 cut-off events. For 25086/26449 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 32608 event pairs, 1428 based on Foata normal form. 111/5618 useless extension candidates. Maximal degree in co-relation 23447. Up to 2776 conditions per place. [2024-11-07 19:34:06,171 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 237 selfloop transitions, 43 changer transitions 0/294 dead transitions. [2024-11-07 19:34:06,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 294 transitions, 3902 flow [2024-11-07 19:34:06,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-07 19:34:06,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-07 19:34:06,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 242 transitions. [2024-11-07 19:34:06,173 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5761904761904761 [2024-11-07 19:34:06,173 INFO L175 Difference]: Start difference. First operand has 175 places, 249 transitions, 2984 flow. Second operand 7 states and 242 transitions. [2024-11-07 19:34:06,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 294 transitions, 3902 flow [2024-11-07 19:34:06,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 294 transitions, 3786 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-07 19:34:06,223 INFO L231 Difference]: Finished difference. Result has 176 places, 251 transitions, 3019 flow [2024-11-07 19:34:06,224 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2866, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3019, PETRI_PLACES=176, PETRI_TRANSITIONS=251} [2024-11-07 19:34:06,224 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 116 predicate places. [2024-11-07 19:34:06,224 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 251 transitions, 3019 flow [2024-11-07 19:34:06,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.571428571428573) internal successors, (193), 7 states have internal predecessors, (193), 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 19:34:06,224 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:34:06,225 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:34:06,237 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 19:34:06,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:34:06,425 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-07 19:34:06,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:34:06,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1616570018, now seen corresponding path program 1 times [2024-11-07 19:34:06,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:34:06,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521816257] [2024-11-07 19:34:06,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:34:06,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:34:06,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:34:06,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:34:06,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:34:06,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521816257] [2024-11-07 19:34:06,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521816257] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:34:06,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:34:06,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:34:06,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629813602] [2024-11-07 19:34:06,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:34:06,486 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:34:06,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:34:06,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:34:06,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:34:06,511 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-11-07 19:34:06,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 251 transitions, 3019 flow. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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 19:34:06,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:34:06,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-11-07 19:34:06,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:34:07,189 INFO L124 PetriNetUnfolderBase]: 2892/5198 cut-off events. [2024-11-07 19:34:07,189 INFO L125 PetriNetUnfolderBase]: For 29097/30177 co-relation queries the response was YES. [2024-11-07 19:34:07,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23540 conditions, 5198 events. 2892/5198 cut-off events. For 29097/30177 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 29851 event pairs, 1938 based on Foata normal form. 333/5503 useless extension candidates. Maximal degree in co-relation 23169. Up to 4050 conditions per place. [2024-11-07 19:34:07,223 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 209 selfloop transitions, 27 changer transitions 0/249 dead transitions. [2024-11-07 19:34:07,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 249 transitions, 3487 flow [2024-11-07 19:34:07,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:34:07,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:34:07,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-11-07 19:34:07,224 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5041666666666667 [2024-11-07 19:34:07,224 INFO L175 Difference]: Start difference. First operand has 176 places, 251 transitions, 3019 flow. Second operand 4 states and 121 transitions. [2024-11-07 19:34:07,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 249 transitions, 3487 flow [2024-11-07 19:34:07,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 249 transitions, 3416 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-07 19:34:07,256 INFO L231 Difference]: Finished difference. Result has 173 places, 249 transitions, 2998 flow [2024-11-07 19:34:07,256 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2944, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2998, PETRI_PLACES=173, PETRI_TRANSITIONS=249} [2024-11-07 19:34:07,256 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 113 predicate places. [2024-11-07 19:34:07,256 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 249 transitions, 2998 flow [2024-11-07 19:34:07,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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 19:34:07,256 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:34:07,256 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:34:07,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-07 19:34:07,256 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-07 19:34:07,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:34:07,257 INFO L85 PathProgramCache]: Analyzing trace with hash 169467554, now seen corresponding path program 1 times [2024-11-07 19:34:07,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:34:07,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394971328] [2024-11-07 19:34:07,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:34:07,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:34:07,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:34:07,422 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 19:34:07,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:34:07,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394971328] [2024-11-07 19:34:07,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394971328] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:34:07,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:34:07,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:34:07,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444970702] [2024-11-07 19:34:07,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:34:07,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:34:07,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:34:07,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:34:07,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:34:07,433 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2024-11-07 19:34:07,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 249 transitions, 2998 flow. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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 19:34:07,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:34:07,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2024-11-07 19:34:07,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:34:08,184 INFO L124 PetriNetUnfolderBase]: 3432/6157 cut-off events. [2024-11-07 19:34:08,184 INFO L125 PetriNetUnfolderBase]: For 37786/38945 co-relation queries the response was YES. [2024-11-07 19:34:08,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28107 conditions, 6157 events. 3432/6157 cut-off events. For 37786/38945 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 36530 event pairs, 1004 based on Foata normal form. 6/6135 useless extension candidates. Maximal degree in co-relation 27734. Up to 3203 conditions per place. [2024-11-07 19:34:08,224 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 193 selfloop transitions, 46 changer transitions 23/275 dead transitions. [2024-11-07 19:34:08,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 275 transitions, 3726 flow [2024-11-07 19:34:08,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:34:08,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:34:08,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 168 transitions. [2024-11-07 19:34:08,225 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-11-07 19:34:08,225 INFO L175 Difference]: Start difference. First operand has 173 places, 249 transitions, 2998 flow. Second operand 4 states and 168 transitions. [2024-11-07 19:34:08,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 275 transitions, 3726 flow [2024-11-07 19:34:08,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 275 transitions, 3698 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:34:08,261 INFO L231 Difference]: Finished difference. Result has 175 places, 232 transitions, 2797 flow [2024-11-07 19:34:08,261 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2970, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2797, PETRI_PLACES=175, PETRI_TRANSITIONS=232} [2024-11-07 19:34:08,262 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 115 predicate places. [2024-11-07 19:34:08,262 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 232 transitions, 2797 flow [2024-11-07 19:34:08,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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 19:34:08,262 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:34:08,262 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:34:08,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-07 19:34:08,262 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-07 19:34:08,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:34:08,263 INFO L85 PathProgramCache]: Analyzing trace with hash -243162745, now seen corresponding path program 2 times [2024-11-07 19:34:08,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:34:08,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603448707] [2024-11-07 19:34:08,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:34:08,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:34:08,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:34:08,698 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-07 19:34:08,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:34:08,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603448707] [2024-11-07 19:34:08,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603448707] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:34:08,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750569079] [2024-11-07 19:34:08,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:34:08,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:34:08,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:34:08,702 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 19:34:08,703 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 19:34:08,811 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:34:08,811 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:34:08,817 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-07 19:34:08,819 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:34:08,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-07 19:34:08,902 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-07 19:34:08,903 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 20 treesize of output 22 [2024-11-07 19:34:09,073 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2024-11-07 19:34:09,073 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 31 [2024-11-07 19:34:09,373 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-07 19:34:09,373 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:34:09,720 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-07 19:34:09,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750569079] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:34:09,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:34:09,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 25 [2024-11-07 19:34:09,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888865592] [2024-11-07 19:34:09,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:34:09,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-07 19:34:09,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:34:09,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-07 19:34:09,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2024-11-07 19:34:11,342 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2024-11-07 19:34:11,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 232 transitions, 2797 flow. Second operand has 27 states, 27 states have (on average 21.11111111111111) internal successors, (570), 27 states have internal predecessors, (570), 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 19:34:11,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:34:11,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2024-11-07 19:34:11,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:34:13,026 INFO L124 PetriNetUnfolderBase]: 4807/8088 cut-off events. [2024-11-07 19:34:13,026 INFO L125 PetriNetUnfolderBase]: For 44612/46432 co-relation queries the response was YES. [2024-11-07 19:34:13,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35548 conditions, 8088 events. 4807/8088 cut-off events. For 44612/46432 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 46898 event pairs, 2062 based on Foata normal form. 308/8206 useless extension candidates. Maximal degree in co-relation 35160. Up to 2798 conditions per place. [2024-11-07 19:34:13,098 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 209 selfloop transitions, 73 changer transitions 0/291 dead transitions. [2024-11-07 19:34:13,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 291 transitions, 3695 flow [2024-11-07 19:34:13,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-07 19:34:13,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-07 19:34:13,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 377 transitions. [2024-11-07 19:34:13,099 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4488095238095238 [2024-11-07 19:34:13,100 INFO L175 Difference]: Start difference. First operand has 175 places, 232 transitions, 2797 flow. Second operand 14 states and 377 transitions. [2024-11-07 19:34:13,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 291 transitions, 3695 flow [2024-11-07 19:34:13,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 291 transitions, 3355 flow, removed 33 selfloop flow, removed 18 redundant places. [2024-11-07 19:34:13,164 INFO L231 Difference]: Finished difference. Result has 164 places, 228 transitions, 2581 flow [2024-11-07 19:34:13,165 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2422, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2581, PETRI_PLACES=164, PETRI_TRANSITIONS=228} [2024-11-07 19:34:13,165 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 104 predicate places. [2024-11-07 19:34:13,165 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 228 transitions, 2581 flow [2024-11-07 19:34:13,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 21.11111111111111) internal successors, (570), 27 states have internal predecessors, (570), 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 19:34:13,165 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:34:13,166 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:34:13,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-07 19:34:13,366 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 19:34:13,366 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-07 19:34:13,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:34:13,367 INFO L85 PathProgramCache]: Analyzing trace with hash 231869449, now seen corresponding path program 1 times [2024-11-07 19:34:13,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:34:13,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964263821] [2024-11-07 19:34:13,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:34:13,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:34:13,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:34:13,457 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:34:13,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:34:13,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964263821] [2024-11-07 19:34:13,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964263821] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:34:13,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508286311] [2024-11-07 19:34:13,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:34:13,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:34:13,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:34:13,460 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 19:34:13,462 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 19:34:13,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:34:13,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-07 19:34:13,575 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:34:13,636 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:34:13,636 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:34:13,680 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:34:13,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508286311] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:34:13,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:34:13,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-07 19:34:13,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575285242] [2024-11-07 19:34:13,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:34:13,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-07 19:34:13,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:34:13,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-07 19:34:13,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-07 19:34:13,771 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-07 19:34:13,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 228 transitions, 2581 flow. Second operand has 14 states, 14 states have (on average 28.857142857142858) internal successors, (404), 14 states have internal predecessors, (404), 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 19:34:13,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:34:13,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-07 19:34:13,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:34:14,565 INFO L124 PetriNetUnfolderBase]: 3525/5629 cut-off events. [2024-11-07 19:34:14,565 INFO L125 PetriNetUnfolderBase]: For 20860/22602 co-relation queries the response was YES. [2024-11-07 19:34:14,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23002 conditions, 5629 events. 3525/5629 cut-off events. For 20860/22602 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 28794 event pairs, 1946 based on Foata normal form. 37/5660 useless extension candidates. Maximal degree in co-relation 22639. Up to 3694 conditions per place. [2024-11-07 19:34:14,620 INFO L140 encePairwiseOnDemand]: 46/60 looper letters, 116 selfloop transitions, 145 changer transitions 0/273 dead transitions. [2024-11-07 19:34:14,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 273 transitions, 3383 flow [2024-11-07 19:34:14,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-07 19:34:14,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-07 19:34:14,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 353 transitions. [2024-11-07 19:34:14,621 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5883333333333334 [2024-11-07 19:34:14,621 INFO L175 Difference]: Start difference. First operand has 164 places, 228 transitions, 2581 flow. Second operand 10 states and 353 transitions. [2024-11-07 19:34:14,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 273 transitions, 3383 flow [2024-11-07 19:34:14,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 273 transitions, 3264 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-11-07 19:34:14,652 INFO L231 Difference]: Finished difference. Result has 166 places, 233 transitions, 2851 flow [2024-11-07 19:34:14,652 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2482, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2851, PETRI_PLACES=166, PETRI_TRANSITIONS=233} [2024-11-07 19:34:14,653 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 106 predicate places. [2024-11-07 19:34:14,653 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 233 transitions, 2851 flow [2024-11-07 19:34:14,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 28.857142857142858) internal successors, (404), 14 states have internal predecessors, (404), 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 19:34:14,653 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:34:14,653 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 4, 1, 1, 1] [2024-11-07 19:34:14,666 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 19:34:14,853 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 19:34:14,854 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-07 19:34:14,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:34:14,854 INFO L85 PathProgramCache]: Analyzing trace with hash -117854968, now seen corresponding path program 4 times [2024-11-07 19:34:14,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:34:14,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244414808] [2024-11-07 19:34:14,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:34:14,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:34:14,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:34:15,329 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:34:15,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:34:15,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244414808] [2024-11-07 19:34:15,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244414808] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:34:15,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152354220] [2024-11-07 19:34:15,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-07 19:34:15,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:34:15,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:34:15,332 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 19:34:15,335 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 19:34:15,439 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-07 19:34:15,440 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:34:15,441 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-07 19:34:15,443 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:34:15,447 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 19:34:15,726 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-07 19:34:15,726 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 32 treesize of output 27 [2024-11-07 19:34:15,927 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:34:15,927 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:34:16,446 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:34:16,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152354220] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:34:16,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:34:16,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 38 [2024-11-07 19:34:16,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030901439] [2024-11-07 19:34:16,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:34:16,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-07 19:34:16,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:34:16,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-07 19:34:16,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1403, Unknown=0, NotChecked=0, Total=1560 [2024-11-07 19:34:19,036 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-11-07 19:34:19,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 233 transitions, 2851 flow. Second operand has 40 states, 40 states have (on average 25.8) internal successors, (1032), 40 states have internal predecessors, (1032), 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 19:34:19,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:34:19,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-11-07 19:34:19,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:34:22,643 INFO L124 PetriNetUnfolderBase]: 5039/8587 cut-off events. [2024-11-07 19:34:22,643 INFO L125 PetriNetUnfolderBase]: For 29378/31943 co-relation queries the response was YES. [2024-11-07 19:34:22,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34216 conditions, 8587 events. 5039/8587 cut-off events. For 29378/31943 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 53382 event pairs, 3318 based on Foata normal form. 24/8541 useless extension candidates. Maximal degree in co-relation 33885. Up to 2963 conditions per place. [2024-11-07 19:34:22,707 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 222 selfloop transitions, 146 changer transitions 0/379 dead transitions. [2024-11-07 19:34:22,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 379 transitions, 5049 flow [2024-11-07 19:34:22,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-07 19:34:22,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-11-07 19:34:22,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 1207 transitions. [2024-11-07 19:34:22,709 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5158119658119659 [2024-11-07 19:34:22,709 INFO L175 Difference]: Start difference. First operand has 166 places, 233 transitions, 2851 flow. Second operand 39 states and 1207 transitions. [2024-11-07 19:34:22,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 379 transitions, 5049 flow [2024-11-07 19:34:22,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 379 transitions, 4646 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-11-07 19:34:22,759 INFO L231 Difference]: Finished difference. Result has 202 places, 266 transitions, 3325 flow [2024-11-07 19:34:22,759 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2396, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=3325, PETRI_PLACES=202, PETRI_TRANSITIONS=266} [2024-11-07 19:34:22,760 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 142 predicate places. [2024-11-07 19:34:22,760 INFO L471 AbstractCegarLoop]: Abstraction has has 202 places, 266 transitions, 3325 flow [2024-11-07 19:34:22,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 25.8) internal successors, (1032), 40 states have internal predecessors, (1032), 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 19:34:22,760 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:34:22,760 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:34:22,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-07 19:34:22,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-07 19:34:22,961 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-07 19:34:22,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:34:22,961 INFO L85 PathProgramCache]: Analyzing trace with hash 769934218, now seen corresponding path program 2 times [2024-11-07 19:34:22,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:34:22,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112669317] [2024-11-07 19:34:22,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:34:22,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:34:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:34:23,248 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:34:23,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:34:23,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112669317] [2024-11-07 19:34:23,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112669317] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:34:23,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201360736] [2024-11-07 19:34:23,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:34:23,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:34:23,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:34:23,252 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:34:23,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-07 19:34:23,412 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:34:23,412 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:34:23,414 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-07 19:34:23,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:34:23,474 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 19:34:23,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-07 19:34:23,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-07 19:34:23,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-07 19:34:23,573 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-07 19:34:23,573 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 19:34:23,835 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-07 19:34:23,836 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:34:24,136 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-07 19:34:24,166 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-07 19:34:24,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201360736] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:34:24,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:34:24,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 22 [2024-11-07 19:34:24,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263011872] [2024-11-07 19:34:24,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:34:24,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-07 19:34:24,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:34:24,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-07 19:34:24,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2024-11-07 19:34:25,356 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-11-07 19:34:25,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 266 transitions, 3325 flow. Second operand has 24 states, 24 states have (on average 24.5) internal successors, (588), 24 states have internal predecessors, (588), 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 19:34:25,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:34:25,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-11-07 19:34:25,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:34:27,918 INFO L124 PetriNetUnfolderBase]: 8838/13388 cut-off events. [2024-11-07 19:34:27,918 INFO L125 PetriNetUnfolderBase]: For 51825/55950 co-relation queries the response was YES. [2024-11-07 19:34:27,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54004 conditions, 13388 events. 8838/13388 cut-off events. For 51825/55950 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 79551 event pairs, 1380 based on Foata normal form. 0/13361 useless extension candidates. Maximal degree in co-relation 53814. Up to 2836 conditions per place. [2024-11-07 19:34:28,021 INFO L140 encePairwiseOnDemand]: 45/60 looper letters, 311 selfloop transitions, 83 changer transitions 0/405 dead transitions. [2024-11-07 19:34:28,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 405 transitions, 5030 flow [2024-11-07 19:34:28,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-07 19:34:28,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-07 19:34:28,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 624 transitions. [2024-11-07 19:34:28,023 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2024-11-07 19:34:28,023 INFO L175 Difference]: Start difference. First operand has 202 places, 266 transitions, 3325 flow. Second operand 21 states and 624 transitions. [2024-11-07 19:34:28,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 405 transitions, 5030 flow [2024-11-07 19:34:28,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 405 transitions, 4914 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-11-07 19:34:28,090 INFO L231 Difference]: Finished difference. Result has 214 places, 270 transitions, 3415 flow [2024-11-07 19:34:28,090 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=3205, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3415, PETRI_PLACES=214, PETRI_TRANSITIONS=270} [2024-11-07 19:34:28,090 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 154 predicate places. [2024-11-07 19:34:28,090 INFO L471 AbstractCegarLoop]: Abstraction has has 214 places, 270 transitions, 3415 flow [2024-11-07 19:34:28,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 24.5) internal successors, (588), 24 states have internal predecessors, (588), 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 19:34:28,091 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:34:28,091 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:34:28,103 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-07 19:34:28,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-11-07 19:34:28,291 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-07 19:34:28,291 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:34:28,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1751133941, now seen corresponding path program 3 times [2024-11-07 19:34:28,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:34:28,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489514487] [2024-11-07 19:34:28,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:34:28,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:34:28,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:34:28,417 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-07 19:34:28,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:34:28,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489514487] [2024-11-07 19:34:28,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489514487] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:34:28,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656489909] [2024-11-07 19:34:28,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-07 19:34:28,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:34:28,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:34:28,421 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:34:28,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-07 19:34:28,530 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-07 19:34:28,530 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:34:28,531 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-07 19:34:28,533 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:34:28,537 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 19:34:28,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-07 19:34:28,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-07 19:34:28,600 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-07 19:34:28,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-07 19:34:28,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-07 19:34:28,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-07 19:34:28,642 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-07 19:34:28,642 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 19:34:28,688 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-07 19:34:28,688 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:34:28,883 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 90 treesize of output 82 [2024-11-07 19:34:29,008 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-07 19:34:29,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656489909] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:34:29,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:34:29,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 20 [2024-11-07 19:34:29,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734308202] [2024-11-07 19:34:29,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:34:29,009 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-07 19:34:29,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:34:29,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-07 19:34:29,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2024-11-07 19:34:29,945 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2024-11-07 19:34:29,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 270 transitions, 3415 flow. Second operand has 21 states, 21 states have (on average 21.666666666666668) internal successors, (455), 21 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 19:34:29,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:34:29,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2024-11-07 19:34:29,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:34:33,070 INFO L124 PetriNetUnfolderBase]: 14171/22213 cut-off events. [2024-11-07 19:34:33,070 INFO L125 PetriNetUnfolderBase]: For 85270/86978 co-relation queries the response was YES. [2024-11-07 19:34:33,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91693 conditions, 22213 events. 14171/22213 cut-off events. For 85270/86978 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 146052 event pairs, 5119 based on Foata normal form. 319/22529 useless extension candidates. Maximal degree in co-relation 91502. Up to 6017 conditions per place. [2024-11-07 19:34:33,340 INFO L140 encePairwiseOnDemand]: 46/60 looper letters, 305 selfloop transitions, 140 changer transitions 0/455 dead transitions. [2024-11-07 19:34:33,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 455 transitions, 5662 flow [2024-11-07 19:34:33,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-07 19:34:33,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-07 19:34:33,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 583 transitions. [2024-11-07 19:34:33,341 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4626984126984127 [2024-11-07 19:34:33,341 INFO L175 Difference]: Start difference. First operand has 214 places, 270 transitions, 3415 flow. Second operand 21 states and 583 transitions. [2024-11-07 19:34:33,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 455 transitions, 5662 flow [2024-11-07 19:34:33,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 455 transitions, 5319 flow, removed 61 selfloop flow, removed 11 redundant places. [2024-11-07 19:34:33,459 INFO L231 Difference]: Finished difference. Result has 226 places, 276 transitions, 3621 flow [2024-11-07 19:34:33,459 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=3259, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3621, PETRI_PLACES=226, PETRI_TRANSITIONS=276} [2024-11-07 19:34:33,459 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 166 predicate places. [2024-11-07 19:34:33,459 INFO L471 AbstractCegarLoop]: Abstraction has has 226 places, 276 transitions, 3621 flow [2024-11-07 19:34:33,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 21.666666666666668) internal successors, (455), 21 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 19:34:33,460 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:34:33,460 INFO L204 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 6, 1, 1, 1] [2024-11-07 19:34:33,472 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-07 19:34:33,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:34:33,660 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-07 19:34:33,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:34:33,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1551041592, now seen corresponding path program 5 times [2024-11-07 19:34:33,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:34:33,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777158285] [2024-11-07 19:34:33,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:34:33,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:34:33,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:34:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 31 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:34:33,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:34:33,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777158285] [2024-11-07 19:34:33,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777158285] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:34:33,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085237468] [2024-11-07 19:34:33,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-07 19:34:33,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:34:33,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:34:33,931 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:34:33,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-07 19:34:34,076 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-07 19:34:34,077 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:34:34,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-07 19:34:34,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:34:34,358 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:34:34,358 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:34:34,576 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:34:34,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085237468] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:34:34,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:34:34,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2024-11-07 19:34:34,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038684904] [2024-11-07 19:34:34,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:34:34,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-07 19:34:34,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:34:34,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-07 19:34:34,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1114, Unknown=0, NotChecked=0, Total=1406 [2024-11-07 19:34:34,818 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2024-11-07 19:34:34,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 276 transitions, 3621 flow. Second operand has 38 states, 38 states have (on average 28.842105263157894) internal successors, (1096), 38 states have internal predecessors, (1096), 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 19:34:34,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:34:34,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2024-11-07 19:34:34,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:34:37,417 INFO L124 PetriNetUnfolderBase]: 9155/16354 cut-off events. [2024-11-07 19:34:37,417 INFO L125 PetriNetUnfolderBase]: For 70809/72787 co-relation queries the response was YES. [2024-11-07 19:34:37,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65839 conditions, 16354 events. 9155/16354 cut-off events. For 70809/72787 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 115236 event pairs, 6697 based on Foata normal form. 10/16157 useless extension candidates. Maximal degree in co-relation 65728. Up to 10986 conditions per place. [2024-11-07 19:34:37,547 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 148 selfloop transitions, 101 changer transitions 0/264 dead transitions. [2024-11-07 19:34:37,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 264 transitions, 3506 flow [2024-11-07 19:34:37,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-07 19:34:37,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-11-07 19:34:37,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1243 transitions. [2024-11-07 19:34:37,549 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5451754385964912 [2024-11-07 19:34:37,549 INFO L175 Difference]: Start difference. First operand has 226 places, 276 transitions, 3621 flow. Second operand 38 states and 1243 transitions. [2024-11-07 19:34:37,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 264 transitions, 3506 flow [2024-11-07 19:34:37,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 264 transitions, 3328 flow, removed 14 selfloop flow, removed 18 redundant places. [2024-11-07 19:34:37,638 INFO L231 Difference]: Finished difference. Result has 246 places, 214 transitions, 2701 flow [2024-11-07 19:34:37,638 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2379, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=2701, PETRI_PLACES=246, PETRI_TRANSITIONS=214} [2024-11-07 19:34:37,638 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 186 predicate places. [2024-11-07 19:34:37,638 INFO L471 AbstractCegarLoop]: Abstraction has has 246 places, 214 transitions, 2701 flow [2024-11-07 19:34:37,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 28.842105263157894) internal successors, (1096), 38 states have internal predecessors, (1096), 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 19:34:37,639 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:34:37,639 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:34:37,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-07 19:34:37,839 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:34:37,839 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-07 19:34:37,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:34:37,840 INFO L85 PathProgramCache]: Analyzing trace with hash 192864932, now seen corresponding path program 2 times [2024-11-07 19:34:37,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:34:37,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112944129] [2024-11-07 19:34:37,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:34:37,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:34:37,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:34:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-07 19:34:38,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:34:38,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112944129] [2024-11-07 19:34:38,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112944129] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:34:38,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533033065] [2024-11-07 19:34:38,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:34:38,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:34:38,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:34:38,524 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:34:38,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-07 19:34:38,633 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:34:38,633 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:34:38,634 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-07 19:34:38,636 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:34:38,640 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 19:34:38,644 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 19:34:38,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-07 19:34:38,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2024-11-07 19:34:38,731 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-07 19:34:38,731 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 19:34:38,777 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-07 19:34:38,777 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 23 treesize of output 20 [2024-11-07 19:34:39,214 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-07 19:34:39,215 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:34:43,634 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 2 refuted. 1 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-07 19:34:43,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533033065] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:34:43,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:34:43,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 24 [2024-11-07 19:34:43,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057766334] [2024-11-07 19:34:43,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:34:43,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-07 19:34:43,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:34:43,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-07 19:34:43,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=558, Unknown=1, NotChecked=0, Total=650 [2024-11-07 19:34:47,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-07 19:34:48,670 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-07 19:34:52,678 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]