./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/test-context1.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/test-context1.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', 'd63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e'] 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/test-context1.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 d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-07 19:39:14,028 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-07 19:39:14,117 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-07 19:39:14,128 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-07 19:39:14,129 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-07 19:39:14,163 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-07 19:39:14,163 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-07 19:39:14,163 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-07 19:39:14,164 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-07 19:39:14,164 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-07 19:39:14,164 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-07 19:39:14,164 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-07 19:39:14,164 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-07 19:39:14,164 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-07 19:39:14,164 INFO L153 SettingsManager]: * Use SBE=true [2024-11-07 19:39:14,165 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-07 19:39:14,165 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-07 19:39:14,165 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-07 19:39:14,165 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-07 19:39:14,165 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-07 19:39:14,165 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-07 19:39:14,165 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-07 19:39:14,165 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-07 19:39:14,165 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-07 19:39:14,165 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-07 19:39:14,165 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-07 19:39:14,165 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-07 19:39:14,166 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-07 19:39:14,166 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-07 19:39:14,166 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-07 19:39:14,166 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-07 19:39:14,166 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-07 19:39:14,166 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-07 19:39:14,168 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:39:14,169 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-07 19:39:14,169 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-07 19:39:14,169 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-07 19:39:14,169 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-07 19:39:14,170 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-07 19:39:14,170 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-07 19:39:14,170 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-07 19:39:14,170 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-07 19:39:14,170 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 -> d63a80d2bfe8ff8bb62e6b5083cee589f2cb0f37dc67867654ab7601d82af23e [2024-11-07 19:39:14,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-07 19:39:14,455 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-07 19:39:14,458 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-07 19:39:14,459 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-07 19:39:14,459 INFO L274 PluginConnector]: CDTParser initialized [2024-11-07 19:39:14,461 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/test-context1.wvr.c [2024-11-07 19:39:15,840 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-07 19:39:16,091 INFO L384 CDTParser]: Found 1 translation units. [2024-11-07 19:39:16,094 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/test-context1.wvr.c [2024-11-07 19:39:16,103 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d147a085e/6fb39b1225084cc3bc77554edffad8dc/FLAGa7df08dde [2024-11-07 19:39:16,125 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/d147a085e/6fb39b1225084cc3bc77554edffad8dc [2024-11-07 19:39:16,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-07 19:39:16,130 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-07 19:39:16,132 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-07 19:39:16,133 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-07 19:39:16,140 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-07 19:39:16,141 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:39:16" (1/1) ... [2024-11-07 19:39:16,141 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@705fd9fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:16, skipping insertion in model container [2024-11-07 19:39:16,142 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:39:16" (1/1) ... [2024-11-07 19:39:16,160 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-07 19:39:16,338 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 19:39:16,340 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:39:16,355 INFO L200 MainTranslator]: Completed pre-run [2024-11-07 19:39:16,378 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:39:16,391 INFO L204 MainTranslator]: Completed translation [2024-11-07 19:39:16,392 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:16 WrapperNode [2024-11-07 19:39:16,392 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-07 19:39:16,393 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-07 19:39:16,393 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-07 19:39:16,393 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-07 19:39:16,398 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:16" (1/1) ... [2024-11-07 19:39:16,404 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:16" (1/1) ... [2024-11-07 19:39:16,426 INFO L138 Inliner]: procedures = 23, calls = 25, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 129 [2024-11-07 19:39:16,426 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-07 19:39:16,427 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-07 19:39:16,427 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-07 19:39:16,427 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-07 19:39:16,435 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:16" (1/1) ... [2024-11-07 19:39:16,435 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:16" (1/1) ... [2024-11-07 19:39:16,437 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:16" (1/1) ... [2024-11-07 19:39:16,450 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-07 19:39:16,450 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:16" (1/1) ... [2024-11-07 19:39:16,450 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:16" (1/1) ... [2024-11-07 19:39:16,456 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:16" (1/1) ... [2024-11-07 19:39:16,459 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:16" (1/1) ... [2024-11-07 19:39:16,461 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:16" (1/1) ... [2024-11-07 19:39:16,462 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:16" (1/1) ... [2024-11-07 19:39:16,464 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-07 19:39:16,465 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-07 19:39:16,465 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-07 19:39:16,465 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-07 19:39:16,466 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:16" (1/1) ... [2024-11-07 19:39:16,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:39:16,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:39:16,503 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 19:39:16,506 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 19:39:16,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-07 19:39:16,529 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-07 19:39:16,529 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-07 19:39:16,529 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-07 19:39:16,530 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-07 19:39:16,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-07 19:39:16,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-07 19:39:16,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-07 19:39:16,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-07 19:39:16,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-07 19:39:16,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-07 19:39:16,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-07 19:39:16,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-07 19:39:16,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-07 19:39:16,531 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-07 19:39:16,531 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-07 19:39:16,533 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 19:39:16,618 INFO L238 CfgBuilder]: Building ICFG [2024-11-07 19:39:16,620 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-07 19:39:16,869 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-07 19:39:16,869 INFO L287 CfgBuilder]: Performing block encoding [2024-11-07 19:39:17,119 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-07 19:39:17,120 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-07 19:39:17,120 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:39:17 BoogieIcfgContainer [2024-11-07 19:39:17,120 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-07 19:39:17,123 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-07 19:39:17,124 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-07 19:39:17,128 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-07 19:39:17,128 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:39:16" (1/3) ... [2024-11-07 19:39:17,129 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23c96297 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:39:17, skipping insertion in model container [2024-11-07 19:39:17,129 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:39:16" (2/3) ... [2024-11-07 19:39:17,130 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23c96297 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:39:17, skipping insertion in model container [2024-11-07 19:39:17,130 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:39:17" (3/3) ... [2024-11-07 19:39:17,131 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2024-11-07 19:39:17,145 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-07 19:39:17,145 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2024-11-07 19:39:17,145 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-07 19:39:17,201 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-07 19:39:17,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 37 transitions, 88 flow [2024-11-07 19:39:17,262 INFO L124 PetriNetUnfolderBase]: 5/35 cut-off events. [2024-11-07 19:39:17,265 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-07 19:39:17,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 35 events. 5/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 54 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-11-07 19:39:17,268 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 37 transitions, 88 flow [2024-11-07 19:39:17,273 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 34 transitions, 80 flow [2024-11-07 19:39:17,284 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 19:39:17,300 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;@1689cfd1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 19:39:17,301 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2024-11-07 19:39:17,308 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 19:39:17,308 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-07 19:39:17,309 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 19:39:17,309 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:39:17,310 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:39:17,310 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-07 19:39:17,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:39:17,315 INFO L85 PathProgramCache]: Analyzing trace with hash 422978, now seen corresponding path program 1 times [2024-11-07 19:39:17,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:39:17,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993135707] [2024-11-07 19:39:17,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:39:17,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:39:17,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:39:17,544 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 19:39:17,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:39:17,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993135707] [2024-11-07 19:39:17,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993135707] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:39:17,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:39:17,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-07 19:39:17,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400403586] [2024-11-07 19:39:17,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:39:17,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:39:17,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:39:17,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:39:17,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:39:17,587 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-11-07 19:39:17,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:17,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:39:17,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-11-07 19:39:17,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:39:17,754 INFO L124 PetriNetUnfolderBase]: 212/371 cut-off events. [2024-11-07 19:39:17,754 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-11-07 19:39:17,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 768 conditions, 371 events. 212/371 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1447 event pairs, 176 based on Foata normal form. 1/266 useless extension candidates. Maximal degree in co-relation 705. Up to 364 conditions per place. [2024-11-07 19:39:17,764 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 23 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2024-11-07 19:39:17,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 120 flow [2024-11-07 19:39:17,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:39:17,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:39:17,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 50 transitions. [2024-11-07 19:39:17,779 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45045045045045046 [2024-11-07 19:39:17,781 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 80 flow. Second operand 3 states and 50 transitions. [2024-11-07 19:39:17,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 120 flow [2024-11-07 19:39:17,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 112 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-07 19:39:17,788 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 66 flow [2024-11-07 19:39:17,791 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2024-11-07 19:39:17,796 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, -5 predicate places. [2024-11-07 19:39:17,796 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 66 flow [2024-11-07 19:39:17,796 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:17,796 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:39:17,797 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:39:17,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-07 19:39:17,798 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-07 19:39:17,798 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:39:17,798 INFO L85 PathProgramCache]: Analyzing trace with hash 422979, now seen corresponding path program 1 times [2024-11-07 19:39:17,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:39:17,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981332774] [2024-11-07 19:39:17,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:39:17,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:39:17,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:39:18,141 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 19:39:18,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:39:18,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981332774] [2024-11-07 19:39:18,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981332774] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:39:18,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:39:18,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:39:18,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735711518] [2024-11-07 19:39:18,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:39:18,142 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:39:18,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:39:18,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:39:18,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:39:18,155 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-11-07 19:39:18,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:18,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:39:18,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-11-07 19:39:18,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:39:18,332 INFO L124 PetriNetUnfolderBase]: 212/370 cut-off events. [2024-11-07 19:39:18,332 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-07 19:39:18,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750 conditions, 370 events. 212/370 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1448 event pairs, 176 based on Foata normal form. 0/265 useless extension candidates. Maximal degree in co-relation 737. Up to 364 conditions per place. [2024-11-07 19:39:18,338 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 21 selfloop transitions, 4 changer transitions 0/28 dead transitions. [2024-11-07 19:39:18,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 28 transitions, 114 flow [2024-11-07 19:39:18,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:39:18,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:39:18,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 54 transitions. [2024-11-07 19:39:18,340 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36486486486486486 [2024-11-07 19:39:18,340 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 66 flow. Second operand 4 states and 54 transitions. [2024-11-07 19:39:18,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 28 transitions, 114 flow [2024-11-07 19:39:18,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 28 transitions, 110 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:39:18,343 INFO L231 Difference]: Finished difference. Result has 31 places, 28 transitions, 68 flow [2024-11-07 19:39:18,343 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=31, PETRI_TRANSITIONS=28} [2024-11-07 19:39:18,344 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, -5 predicate places. [2024-11-07 19:39:18,344 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 28 transitions, 68 flow [2024-11-07 19:39:18,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:18,344 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:39:18,344 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:39:18,345 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-07 19:39:18,345 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-07 19:39:18,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:39:18,345 INFO L85 PathProgramCache]: Analyzing trace with hash -140644634, now seen corresponding path program 1 times [2024-11-07 19:39:18,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:39:18,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408040875] [2024-11-07 19:39:18,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:39:18,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:39:18,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:39:18,446 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 19:39:18,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:39:18,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408040875] [2024-11-07 19:39:18,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408040875] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:39:18,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:39:18,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:39:18,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207747686] [2024-11-07 19:39:18,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:39:18,447 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:39:18,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:39:18,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:39:18,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:39:18,452 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-07 19:39:18,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 28 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:18,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:39:18,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-07 19:39:18,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:39:18,609 INFO L124 PetriNetUnfolderBase]: 280/512 cut-off events. [2024-11-07 19:39:18,610 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-11-07 19:39:18,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041 conditions, 512 events. 280/512 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2239 event pairs, 244 based on Foata normal form. 23/405 useless extension candidates. Maximal degree in co-relation 737. Up to 367 conditions per place. [2024-11-07 19:39:18,616 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 38 selfloop transitions, 3 changer transitions 2/46 dead transitions. [2024-11-07 19:39:18,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 46 transitions, 200 flow [2024-11-07 19:39:18,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:39:18,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:39:18,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 81 transitions. [2024-11-07 19:39:18,618 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5472972972972973 [2024-11-07 19:39:18,619 INFO L175 Difference]: Start difference. First operand has 31 places, 28 transitions, 68 flow. Second operand 4 states and 81 transitions. [2024-11-07 19:39:18,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 46 transitions, 200 flow [2024-11-07 19:39:18,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 46 transitions, 186 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:39:18,623 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 90 flow [2024-11-07 19:39:18,623 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=90, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2024-11-07 19:39:18,624 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, -3 predicate places. [2024-11-07 19:39:18,624 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 90 flow [2024-11-07 19:39:18,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:18,625 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:39:18,625 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:39:18,625 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-07 19:39:18,625 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-07 19:39:18,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:39:18,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1245319039, now seen corresponding path program 1 times [2024-11-07 19:39:18,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:39:18,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216849883] [2024-11-07 19:39:18,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:39:18,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:39:18,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:39:18,926 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 19:39:18,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:39:18,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216849883] [2024-11-07 19:39:18,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216849883] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:39:18,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483607910] [2024-11-07 19:39:18,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:39:18,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:39:18,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:39:18,930 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 19:39:18,931 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 19:39:19,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:39:19,009 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-07 19:39:19,013 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:39:19,178 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 19:39:19,179 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:39:19,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-11-07 19:39:19,339 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 19:39:19,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483607910] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:39:19,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:39:19,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-07 19:39:19,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859837303] [2024-11-07 19:39:19,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:39:19,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-07 19:39:19,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:39:19,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-07 19:39:19,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-11-07 19:39:19,393 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-07 19:39:19,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 90 flow. Second operand has 11 states, 11 states have (on average 10.181818181818182) internal successors, (112), 11 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:19,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:39:19,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-07 19:39:19,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:39:19,724 INFO L124 PetriNetUnfolderBase]: 352/649 cut-off events. [2024-11-07 19:39:19,724 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-07 19:39:19,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1443 conditions, 649 events. 352/649 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2893 event pairs, 307 based on Foata normal form. 13/501 useless extension candidates. Maximal degree in co-relation 1145. Up to 472 conditions per place. [2024-11-07 19:39:19,728 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 40 selfloop transitions, 5 changer transitions 0/48 dead transitions. [2024-11-07 19:39:19,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 48 transitions, 224 flow [2024-11-07 19:39:19,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:39:19,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:39:19,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-11-07 19:39:19,730 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4810810810810811 [2024-11-07 19:39:19,731 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 90 flow. Second operand 5 states and 89 transitions. [2024-11-07 19:39:19,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 48 transitions, 224 flow [2024-11-07 19:39:19,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 48 transitions, 222 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:39:19,734 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 114 flow [2024-11-07 19:39:19,734 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=114, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2024-11-07 19:39:19,735 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 1 predicate places. [2024-11-07 19:39:19,735 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 114 flow [2024-11-07 19:39:19,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.181818181818182) internal successors, (112), 11 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:19,735 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:39:19,735 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:39:19,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-07 19:39:19,936 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 19:39:19,937 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-07 19:39:19,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:39:19,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1245319038, now seen corresponding path program 1 times [2024-11-07 19:39:19,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:39:19,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590885536] [2024-11-07 19:39:19,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:39:19,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:39:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:39:19,997 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 19:39:19,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:39:19,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590885536] [2024-11-07 19:39:19,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590885536] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:39:19,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:39:19,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:39:19,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693258970] [2024-11-07 19:39:20,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:39:20,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:39:20,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:39:20,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:39:20,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:39:20,013 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 37 [2024-11-07 19:39:20,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:20,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:39:20,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 37 [2024-11-07 19:39:20,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:39:20,102 INFO L124 PetriNetUnfolderBase]: 294/548 cut-off events. [2024-11-07 19:39:20,102 INFO L125 PetriNetUnfolderBase]: For 78/78 co-relation queries the response was YES. [2024-11-07 19:39:20,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1273 conditions, 548 events. 294/548 cut-off events. For 78/78 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 2386 event pairs, 264 based on Foata normal form. 28/470 useless extension candidates. Maximal degree in co-relation 963. Up to 534 conditions per place. [2024-11-07 19:39:20,105 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 23 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-11-07 19:39:20,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 29 transitions, 156 flow [2024-11-07 19:39:20,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:39:20,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:39:20,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 53 transitions. [2024-11-07 19:39:20,106 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3581081081081081 [2024-11-07 19:39:20,106 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 114 flow. Second operand 4 states and 53 transitions. [2024-11-07 19:39:20,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 29 transitions, 156 flow [2024-11-07 19:39:20,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 29 transitions, 148 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-07 19:39:20,108 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 102 flow [2024-11-07 19:39:20,108 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2024-11-07 19:39:20,109 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 0 predicate places. [2024-11-07 19:39:20,109 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 102 flow [2024-11-07 19:39:20,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:20,109 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:39:20,109 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:39:20,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-07 19:39:20,109 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-07 19:39:20,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:39:20,110 INFO L85 PathProgramCache]: Analyzing trace with hash -627583917, now seen corresponding path program 1 times [2024-11-07 19:39:20,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:39:20,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369430760] [2024-11-07 19:39:20,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:39:20,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:39:20,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:39:20,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:39:20,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:39:20,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369430760] [2024-11-07 19:39:20,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369430760] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:39:20,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327246851] [2024-11-07 19:39:20,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:39:20,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:39:20,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:39:20,244 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 19:39:20,246 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 19:39:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:39:20,308 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-07 19:39:20,309 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:39:20,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:39:20,472 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:39:20,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:39:20,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327246851] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:39:20,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:39:20,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-07 19:39:20,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921721738] [2024-11-07 19:39:20,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:39:20,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-07 19:39:20,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:39:20,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-07 19:39:20,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2024-11-07 19:39:20,643 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-07 19:39:20,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 102 flow. Second operand has 14 states, 14 states have (on average 10.357142857142858) internal successors, (145), 14 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:20,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:39:20,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-07 19:39:20,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:39:21,042 INFO L124 PetriNetUnfolderBase]: 547/1012 cut-off events. [2024-11-07 19:39:21,042 INFO L125 PetriNetUnfolderBase]: For 153/153 co-relation queries the response was YES. [2024-11-07 19:39:21,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2287 conditions, 1012 events. 547/1012 cut-off events. For 153/153 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4925 event pairs, 341 based on Foata normal form. 24/840 useless extension candidates. Maximal degree in co-relation 1210. Up to 401 conditions per place. [2024-11-07 19:39:21,050 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 79 selfloop transitions, 10 changer transitions 2/94 dead transitions. [2024-11-07 19:39:21,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 94 transitions, 454 flow [2024-11-07 19:39:21,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:39:21,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:39:21,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-11-07 19:39:21,052 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4984984984984985 [2024-11-07 19:39:21,052 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 102 flow. Second operand 9 states and 166 transitions. [2024-11-07 19:39:21,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 94 transitions, 454 flow [2024-11-07 19:39:21,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 94 transitions, 449 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:39:21,057 INFO L231 Difference]: Finished difference. Result has 47 places, 35 transitions, 180 flow [2024-11-07 19:39:21,058 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=180, PETRI_PLACES=47, PETRI_TRANSITIONS=35} [2024-11-07 19:39:21,059 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 11 predicate places. [2024-11-07 19:39:21,059 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 35 transitions, 180 flow [2024-11-07 19:39:21,059 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 10.357142857142858) internal successors, (145), 14 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:21,060 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:39:21,060 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-07 19:39:21,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-07 19:39:21,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:39:21,265 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-07 19:39:21,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:39:21,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1743803067, now seen corresponding path program 2 times [2024-11-07 19:39:21,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:39:21,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776572971] [2024-11-07 19:39:21,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:39:21,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:39:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:39:21,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:39:21,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:39:21,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776572971] [2024-11-07 19:39:21,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776572971] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:39:21,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174736469] [2024-11-07 19:39:21,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:39:21,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:39:21,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:39:21,597 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 19:39:21,599 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 19:39:21,657 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-07 19:39:21,657 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:39:21,658 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-07 19:39:21,660 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:39:21,679 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 19:39:21,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-07 19:39:21,851 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-07 19:39:21,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174736469] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:39:21,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-07 19:39:21,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 7 [2024-11-07 19:39:21,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752301324] [2024-11-07 19:39:21,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:39:21,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:39:21,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:39:21,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:39:21,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-11-07 19:39:21,860 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-07 19:39:21,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 35 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:21,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:39:21,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-07 19:39:21,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:39:21,970 INFO L124 PetriNetUnfolderBase]: 483/910 cut-off events. [2024-11-07 19:39:21,971 INFO L125 PetriNetUnfolderBase]: For 549/549 co-relation queries the response was YES. [2024-11-07 19:39:21,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2097 conditions, 910 events. 483/910 cut-off events. For 549/549 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4526 event pairs, 446 based on Foata normal form. 33/802 useless extension candidates. Maximal degree in co-relation 1649. Up to 888 conditions per place. [2024-11-07 19:39:21,978 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 25 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2024-11-07 19:39:21,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 32 transitions, 210 flow [2024-11-07 19:39:21,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:39:21,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:39:21,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 55 transitions. [2024-11-07 19:39:21,980 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3716216216216216 [2024-11-07 19:39:21,980 INFO L175 Difference]: Start difference. First operand has 47 places, 35 transitions, 180 flow. Second operand 4 states and 55 transitions. [2024-11-07 19:39:21,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 32 transitions, 210 flow [2024-11-07 19:39:21,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 32 transitions, 197 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-11-07 19:39:21,985 INFO L231 Difference]: Finished difference. Result has 47 places, 32 transitions, 147 flow [2024-11-07 19:39:21,986 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=47, PETRI_TRANSITIONS=32} [2024-11-07 19:39:21,987 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 11 predicate places. [2024-11-07 19:39:21,989 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 32 transitions, 147 flow [2024-11-07 19:39:21,989 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:21,989 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:39:21,989 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:39:22,007 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 19:39:22,190 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 19:39:22,190 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-07 19:39:22,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:39:22,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1048301473, now seen corresponding path program 1 times [2024-11-07 19:39:22,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:39:22,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587491852] [2024-11-07 19:39:22,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:39:22,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:39:22,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:39:22,226 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 19:39:22,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:39:22,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587491852] [2024-11-07 19:39:22,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587491852] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:39:22,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:39:22,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:39:22,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375799901] [2024-11-07 19:39:22,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:39:22,227 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:39:22,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:39:22,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:39:22,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:39:22,228 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-07 19:39:22,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 32 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:22,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:39:22,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-07 19:39:22,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:39:22,335 INFO L124 PetriNetUnfolderBase]: 547/1011 cut-off events. [2024-11-07 19:39:22,335 INFO L125 PetriNetUnfolderBase]: For 417/417 co-relation queries the response was YES. [2024-11-07 19:39:22,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2347 conditions, 1011 events. 547/1011 cut-off events. For 417/417 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4915 event pairs, 362 based on Foata normal form. 5/856 useless extension candidates. Maximal degree in co-relation 1872. Up to 714 conditions per place. [2024-11-07 19:39:22,341 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 35 selfloop transitions, 3 changer transitions 4/45 dead transitions. [2024-11-07 19:39:22,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 45 transitions, 273 flow [2024-11-07 19:39:22,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:39:22,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:39:22,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 59 transitions. [2024-11-07 19:39:22,343 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5315315315315315 [2024-11-07 19:39:22,343 INFO L175 Difference]: Start difference. First operand has 47 places, 32 transitions, 147 flow. Second operand 3 states and 59 transitions. [2024-11-07 19:39:22,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 45 transitions, 273 flow [2024-11-07 19:39:22,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 45 transitions, 263 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-07 19:39:22,346 INFO L231 Difference]: Finished difference. Result has 47 places, 32 transitions, 150 flow [2024-11-07 19:39:22,346 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=47, PETRI_TRANSITIONS=32} [2024-11-07 19:39:22,347 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 11 predicate places. [2024-11-07 19:39:22,348 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 32 transitions, 150 flow [2024-11-07 19:39:22,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:22,348 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:39:22,349 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:39:22,349 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-07 19:39:22,349 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-07 19:39:22,349 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:39:22,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1243439060, now seen corresponding path program 1 times [2024-11-07 19:39:22,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:39:22,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487691002] [2024-11-07 19:39:22,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:39:22,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:39:22,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:39:22,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:39:22,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:39:22,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487691002] [2024-11-07 19:39:22,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487691002] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:39:22,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396310935] [2024-11-07 19:39:22,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:39:22,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:39:22,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:39:22,605 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 19:39:22,607 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 19:39:22,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:39:22,675 INFO L255 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-07 19:39:22,676 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:39:22,766 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:39:22,766 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:39:22,801 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-07 19:39:22,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-11-07 19:39:22,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:39:22,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396310935] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:39:22,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:39:22,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-11-07 19:39:22,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785445945] [2024-11-07 19:39:22,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:39:22,825 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-07 19:39:22,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:39:22,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-07 19:39:22,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-07 19:39:22,830 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-07 19:39:22,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 32 transitions, 150 flow. Second operand has 10 states, 10 states have (on average 13.9) internal successors, (139), 10 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 19:39:22,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:39:22,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-07 19:39:22,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:39:23,086 INFO L124 PetriNetUnfolderBase]: 629/1135 cut-off events. [2024-11-07 19:39:23,087 INFO L125 PetriNetUnfolderBase]: For 769/769 co-relation queries the response was YES. [2024-11-07 19:39:23,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2781 conditions, 1135 events. 629/1135 cut-off events. For 769/769 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 5204 event pairs, 136 based on Foata normal form. 2/959 useless extension candidates. Maximal degree in co-relation 1916. Up to 302 conditions per place. [2024-11-07 19:39:23,094 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 47 selfloop transitions, 8 changer transitions 12/70 dead transitions. [2024-11-07 19:39:23,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 70 transitions, 391 flow [2024-11-07 19:39:23,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:39:23,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:39:23,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-11-07 19:39:23,095 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4954954954954955 [2024-11-07 19:39:23,095 INFO L175 Difference]: Start difference. First operand has 47 places, 32 transitions, 150 flow. Second operand 6 states and 110 transitions. [2024-11-07 19:39:23,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 70 transitions, 391 flow [2024-11-07 19:39:23,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 70 transitions, 376 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-11-07 19:39:23,101 INFO L231 Difference]: Finished difference. Result has 49 places, 33 transitions, 172 flow [2024-11-07 19:39:23,101 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=172, PETRI_PLACES=49, PETRI_TRANSITIONS=33} [2024-11-07 19:39:23,101 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 13 predicate places. [2024-11-07 19:39:23,102 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 33 transitions, 172 flow [2024-11-07 19:39:23,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.9) internal successors, (139), 10 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 19:39:23,103 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:39:23,103 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:39:23,119 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 19:39:23,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-07 19:39:23,308 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-07 19:39:23,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:39:23,308 INFO L85 PathProgramCache]: Analyzing trace with hash 763251397, now seen corresponding path program 2 times [2024-11-07 19:39:23,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:39:23,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250857291] [2024-11-07 19:39:23,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:39:23,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:39:23,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:39:23,404 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:39:23,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:39:23,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250857291] [2024-11-07 19:39:23,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250857291] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:39:23,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201821678] [2024-11-07 19:39:23,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:39:23,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:39:23,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:39:23,409 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 19:39:23,411 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 19:39:23,482 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:39:23,483 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:39:23,484 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-07 19:39:23,485 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:39:23,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-07 19:39:23,516 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:39:23,553 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-07 19:39:23,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201821678] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:39:23,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:39:23,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2024-11-07 19:39:23,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358789427] [2024-11-07 19:39:23,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:39:23,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:39:23,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:39:23,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:39:23,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:39:23,554 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-07 19:39:23,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 33 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:23,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:39:23,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-07 19:39:23,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:39:23,764 INFO L124 PetriNetUnfolderBase]: 936/1678 cut-off events. [2024-11-07 19:39:23,765 INFO L125 PetriNetUnfolderBase]: For 1504/1504 co-relation queries the response was YES. [2024-11-07 19:39:23,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4081 conditions, 1678 events. 936/1678 cut-off events. For 1504/1504 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 7950 event pairs, 409 based on Foata normal form. 33/1447 useless extension candidates. Maximal degree in co-relation 3119. Up to 667 conditions per place. [2024-11-07 19:39:23,773 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 53 selfloop transitions, 7 changer transitions 3/66 dead transitions. [2024-11-07 19:39:23,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 66 transitions, 416 flow [2024-11-07 19:39:23,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:39:23,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:39:23,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-11-07 19:39:23,775 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5743243243243243 [2024-11-07 19:39:23,775 INFO L175 Difference]: Start difference. First operand has 49 places, 33 transitions, 172 flow. Second operand 4 states and 85 transitions. [2024-11-07 19:39:23,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 66 transitions, 416 flow [2024-11-07 19:39:23,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 66 transitions, 398 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-07 19:39:23,780 INFO L231 Difference]: Finished difference. Result has 50 places, 35 transitions, 210 flow [2024-11-07 19:39:23,780 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=210, PETRI_PLACES=50, PETRI_TRANSITIONS=35} [2024-11-07 19:39:23,781 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 14 predicate places. [2024-11-07 19:39:23,782 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 35 transitions, 210 flow [2024-11-07 19:39:23,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 5 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:23,782 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:39:23,782 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:39:23,800 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-07 19:39:23,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-07 19:39:23,983 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-07 19:39:23,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:39:23,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1404820051, now seen corresponding path program 3 times [2024-11-07 19:39:23,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:39:23,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045258519] [2024-11-07 19:39:23,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:39:23,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:39:24,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:39:24,412 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-07 19:39:24,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:39:24,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045258519] [2024-11-07 19:39:24,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045258519] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:39:24,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262447299] [2024-11-07 19:39:24,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-07 19:39:24,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:39:24,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:39:24,416 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 19:39:24,418 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 19:39:24,541 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-07 19:39:24,541 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:39:24,542 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-07 19:39:24,544 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:39:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-07 19:39:24,650 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:39:24,698 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-07 19:39:24,698 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-11-07 19:39:24,762 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-07 19:39:24,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262447299] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:39:24,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:39:24,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 12 [2024-11-07 19:39:24,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5120252] [2024-11-07 19:39:24,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:39:24,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-07 19:39:24,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:39:24,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-07 19:39:24,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2024-11-07 19:39:24,785 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-07 19:39:24,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 35 transitions, 210 flow. Second operand has 13 states, 13 states have (on average 11.461538461538462) internal successors, (149), 13 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:24,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:39:24,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-07 19:39:24,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:39:25,197 INFO L124 PetriNetUnfolderBase]: 959/1673 cut-off events. [2024-11-07 19:39:25,197 INFO L125 PetriNetUnfolderBase]: For 2491/2491 co-relation queries the response was YES. [2024-11-07 19:39:25,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4507 conditions, 1673 events. 959/1673 cut-off events. For 2491/2491 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 7574 event pairs, 140 based on Foata normal form. 4/1418 useless extension candidates. Maximal degree in co-relation 4468. Up to 427 conditions per place. [2024-11-07 19:39:25,205 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 58 selfloop transitions, 15 changer transitions 24/100 dead transitions. [2024-11-07 19:39:25,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 100 transitions, 598 flow [2024-11-07 19:39:25,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-07 19:39:25,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-07 19:39:25,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-11-07 19:39:25,206 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4756756756756757 [2024-11-07 19:39:25,207 INFO L175 Difference]: Start difference. First operand has 50 places, 35 transitions, 210 flow. Second operand 10 states and 176 transitions. [2024-11-07 19:39:25,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 100 transitions, 598 flow [2024-11-07 19:39:25,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 100 transitions, 550 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-11-07 19:39:25,211 INFO L231 Difference]: Finished difference. Result has 57 places, 38 transitions, 269 flow [2024-11-07 19:39:25,211 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=269, PETRI_PLACES=57, PETRI_TRANSITIONS=38} [2024-11-07 19:39:25,211 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 21 predicate places. [2024-11-07 19:39:25,211 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 38 transitions, 269 flow [2024-11-07 19:39:25,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 11.461538461538462) internal successors, (149), 13 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:25,212 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:39:25,212 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:39:25,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-07 19:39:25,412 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,SelfDestructingSolverStorable10 [2024-11-07 19:39:25,413 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-07 19:39:25,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:39:25,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1682690089, now seen corresponding path program 4 times [2024-11-07 19:39:25,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:39:25,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539111353] [2024-11-07 19:39:25,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:39:25,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:39:25,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:39:25,761 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:39:25,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:39:25,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539111353] [2024-11-07 19:39:25,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539111353] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:39:25,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814122761] [2024-11-07 19:39:25,762 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-07 19:39:25,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:39:25,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:39:25,764 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 19:39:25,766 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 19:39:25,864 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-07 19:39:25,865 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:39:25,866 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-07 19:39:25,868 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:39:26,107 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:39:26,107 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:39:26,171 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-07 19:39:26,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2024-11-07 19:39:26,277 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:39:26,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814122761] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:39:26,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:39:26,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 19 [2024-11-07 19:39:26,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949597147] [2024-11-07 19:39:26,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:39:26,278 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-07 19:39:26,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:39:26,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-07 19:39:26,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2024-11-07 19:39:26,316 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-07 19:39:26,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 38 transitions, 269 flow. Second operand has 20 states, 20 states have (on average 12.05) internal successors, (241), 20 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:26,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:39:26,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-07 19:39:26,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:39:26,980 INFO L124 PetriNetUnfolderBase]: 1039/1809 cut-off events. [2024-11-07 19:39:26,980 INFO L125 PetriNetUnfolderBase]: For 2530/2530 co-relation queries the response was YES. [2024-11-07 19:39:26,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4774 conditions, 1809 events. 1039/1809 cut-off events. For 2530/2530 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 8259 event pairs, 104 based on Foata normal form. 1/1530 useless extension candidates. Maximal degree in co-relation 4730. Up to 325 conditions per place. [2024-11-07 19:39:26,989 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 90 selfloop transitions, 17 changer transitions 39/149 dead transitions. [2024-11-07 19:39:26,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 149 transitions, 844 flow [2024-11-07 19:39:26,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-07 19:39:26,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-07 19:39:26,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 257 transitions. [2024-11-07 19:39:26,992 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49613899613899615 [2024-11-07 19:39:26,992 INFO L175 Difference]: Start difference. First operand has 57 places, 38 transitions, 269 flow. Second operand 14 states and 257 transitions. [2024-11-07 19:39:26,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 149 transitions, 844 flow [2024-11-07 19:39:26,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 149 transitions, 776 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-11-07 19:39:27,000 INFO L231 Difference]: Finished difference. Result has 62 places, 40 transitions, 265 flow [2024-11-07 19:39:27,000 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=265, PETRI_PLACES=62, PETRI_TRANSITIONS=40} [2024-11-07 19:39:27,000 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 26 predicate places. [2024-11-07 19:39:27,001 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 40 transitions, 265 flow [2024-11-07 19:39:27,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 12.05) internal successors, (241), 20 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:27,001 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:39:27,001 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:39:27,018 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 19:39:27,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:39:27,202 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-07 19:39:27,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:39:27,202 INFO L85 PathProgramCache]: Analyzing trace with hash -893986846, now seen corresponding path program 5 times [2024-11-07 19:39:27,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:39:27,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063901373] [2024-11-07 19:39:27,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:39:27,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:39:27,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:39:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-07 19:39:27,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:39:27,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063901373] [2024-11-07 19:39:27,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063901373] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:39:27,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604491092] [2024-11-07 19:39:27,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-07 19:39:27,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:39:27,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:39:27,350 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 19:39:27,352 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 19:39:27,433 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-07 19:39:27,433 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:39:27,435 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-07 19:39:27,436 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:39:27,488 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-07 19:39:27,488 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:39:27,549 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-07 19:39:27,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604491092] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:39:27,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:39:27,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 10 [2024-11-07 19:39:27,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421207329] [2024-11-07 19:39:27,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:39:27,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-07 19:39:27,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:39:27,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-07 19:39:27,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-07 19:39:27,560 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-07 19:39:27,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 40 transitions, 265 flow. Second operand has 11 states, 11 states have (on average 13.0) internal successors, (143), 11 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:27,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:39:27,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-07 19:39:27,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:39:28,141 INFO L124 PetriNetUnfolderBase]: 2981/5203 cut-off events. [2024-11-07 19:39:28,141 INFO L125 PetriNetUnfolderBase]: For 5750/5750 co-relation queries the response was YES. [2024-11-07 19:39:28,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12999 conditions, 5203 events. 2981/5203 cut-off events. For 5750/5750 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 29582 event pairs, 720 based on Foata normal form. 66/4456 useless extension candidates. Maximal degree in co-relation 9481. Up to 1046 conditions per place. [2024-11-07 19:39:28,166 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 71 selfloop transitions, 25 changer transitions 88/187 dead transitions. [2024-11-07 19:39:28,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 187 transitions, 1239 flow [2024-11-07 19:39:28,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-07 19:39:28,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-07 19:39:28,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 271 transitions. [2024-11-07 19:39:28,168 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5231660231660231 [2024-11-07 19:39:28,168 INFO L175 Difference]: Start difference. First operand has 62 places, 40 transitions, 265 flow. Second operand 14 states and 271 transitions. [2024-11-07 19:39:28,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 187 transitions, 1239 flow [2024-11-07 19:39:28,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 187 transitions, 1136 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-11-07 19:39:28,180 INFO L231 Difference]: Finished difference. Result has 70 places, 55 transitions, 438 flow [2024-11-07 19:39:28,180 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=438, PETRI_PLACES=70, PETRI_TRANSITIONS=55} [2024-11-07 19:39:28,180 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 34 predicate places. [2024-11-07 19:39:28,181 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 55 transitions, 438 flow [2024-11-07 19:39:28,181 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.0) internal successors, (143), 11 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:28,181 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:39:28,181 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:39:28,197 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 19:39:28,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:39:28,382 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-07 19:39:28,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:39:28,383 INFO L85 PathProgramCache]: Analyzing trace with hash 687773500, now seen corresponding path program 6 times [2024-11-07 19:39:28,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:39:28,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380462945] [2024-11-07 19:39:28,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:39:28,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:39:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:39:28,842 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-07 19:39:28,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:39:28,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380462945] [2024-11-07 19:39:28,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380462945] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:39:28,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198121204] [2024-11-07 19:39:28,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-07 19:39:28,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:39:28,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:39:28,845 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 19:39:28,847 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 19:39:29,061 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-11-07 19:39:29,062 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:39:29,063 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-07 19:39:29,065 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:39:29,311 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-07 19:39:29,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-11-07 19:39:29,323 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-07 19:39:29,324 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:39:29,369 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-07 19:39:29,369 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-11-07 19:39:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-07 19:39:29,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198121204] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:39:29,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:39:29,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2024-11-07 19:39:29,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285221175] [2024-11-07 19:39:29,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:39:29,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-07 19:39:29,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:39:29,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-07 19:39:29,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2024-11-07 19:39:29,705 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-07 19:39:29,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 55 transitions, 438 flow. Second operand has 27 states, 27 states have (on average 11.296296296296296) internal successors, (305), 27 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:29,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:39:29,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-07 19:39:29,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:39:32,056 INFO L124 PetriNetUnfolderBase]: 7223/12501 cut-off events. [2024-11-07 19:39:32,056 INFO L125 PetriNetUnfolderBase]: For 15224/15224 co-relation queries the response was YES. [2024-11-07 19:39:32,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32470 conditions, 12501 events. 7223/12501 cut-off events. For 15224/15224 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 83257 event pairs, 715 based on Foata normal form. 102/10654 useless extension candidates. Maximal degree in co-relation 31995. Up to 2300 conditions per place. [2024-11-07 19:39:32,119 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 269 selfloop transitions, 68 changer transitions 216/556 dead transitions. [2024-11-07 19:39:32,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 556 transitions, 3589 flow [2024-11-07 19:39:32,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-07 19:39:32,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-11-07 19:39:32,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 839 transitions. [2024-11-07 19:39:32,125 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5398970398970399 [2024-11-07 19:39:32,125 INFO L175 Difference]: Start difference. First operand has 70 places, 55 transitions, 438 flow. Second operand 42 states and 839 transitions. [2024-11-07 19:39:32,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 556 transitions, 3589 flow [2024-11-07 19:39:32,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 556 transitions, 3399 flow, removed 93 selfloop flow, removed 5 redundant places. [2024-11-07 19:39:32,162 INFO L231 Difference]: Finished difference. Result has 119 places, 95 transitions, 1031 flow [2024-11-07 19:39:32,162 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=1031, PETRI_PLACES=119, PETRI_TRANSITIONS=95} [2024-11-07 19:39:32,163 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 83 predicate places. [2024-11-07 19:39:32,163 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 95 transitions, 1031 flow [2024-11-07 19:39:32,163 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 11.296296296296296) internal successors, (305), 27 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:32,163 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:39:32,163 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:39:32,182 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 19:39:32,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:39:32,364 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-07 19:39:32,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:39:32,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1208331588, now seen corresponding path program 7 times [2024-11-07 19:39:32,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:39:32,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066478822] [2024-11-07 19:39:32,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:39:32,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:39:32,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:39:32,864 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:39:32,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:39:32,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066478822] [2024-11-07 19:39:32,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066478822] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:39:32,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392116963] [2024-11-07 19:39:32,864 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-07 19:39:32,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:39:32,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:39:32,867 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 19:39:32,869 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 19:39:32,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:39:32,947 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-07 19:39:32,949 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:39:33,145 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-07 19:39:33,145 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:39:33,223 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-07 19:39:33,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2024-11-07 19:39:33,306 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-07 19:39:33,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392116963] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:39:33,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:39:33,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 24 [2024-11-07 19:39:33,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121832049] [2024-11-07 19:39:33,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:39:33,306 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-07 19:39:33,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:39:33,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-07 19:39:33,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2024-11-07 19:39:33,356 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-07 19:39:33,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 95 transitions, 1031 flow. Second operand has 25 states, 25 states have (on average 11.96) internal successors, (299), 25 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:33,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:39:33,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-07 19:39:33,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:39:34,946 INFO L124 PetriNetUnfolderBase]: 5545/9625 cut-off events. [2024-11-07 19:39:34,946 INFO L125 PetriNetUnfolderBase]: For 25485/25485 co-relation queries the response was YES. [2024-11-07 19:39:34,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27250 conditions, 9625 events. 5545/9625 cut-off events. For 25485/25485 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 60603 event pairs, 636 based on Foata normal form. 18/8134 useless extension candidates. Maximal degree in co-relation 27154. Up to 1775 conditions per place. [2024-11-07 19:39:34,988 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 125 selfloop transitions, 69 changer transitions 70/267 dead transitions. [2024-11-07 19:39:34,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 267 transitions, 2237 flow [2024-11-07 19:39:34,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-07 19:39:34,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-07 19:39:34,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 359 transitions. [2024-11-07 19:39:34,990 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5106685633001422 [2024-11-07 19:39:34,990 INFO L175 Difference]: Start difference. First operand has 119 places, 95 transitions, 1031 flow. Second operand 19 states and 359 transitions. [2024-11-07 19:39:34,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 267 transitions, 2237 flow [2024-11-07 19:39:35,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 267 transitions, 2038 flow, removed 76 selfloop flow, removed 12 redundant places. [2024-11-07 19:39:35,122 INFO L231 Difference]: Finished difference. Result has 123 places, 96 transitions, 1210 flow [2024-11-07 19:39:35,123 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=879, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1210, PETRI_PLACES=123, PETRI_TRANSITIONS=96} [2024-11-07 19:39:35,123 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 87 predicate places. [2024-11-07 19:39:35,123 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 96 transitions, 1210 flow [2024-11-07 19:39:35,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 11.96) internal successors, (299), 25 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:35,124 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:39:35,124 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:39:35,141 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 19:39:35,324 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,SelfDestructingSolverStorable14 [2024-11-07 19:39:35,324 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-07 19:39:35,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:39:35,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1446394027, now seen corresponding path program 8 times [2024-11-07 19:39:35,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:39:35,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146939684] [2024-11-07 19:39:35,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:39:35,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:39:35,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:39:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-07 19:39:35,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:39:35,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146939684] [2024-11-07 19:39:35,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146939684] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:39:35,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622766283] [2024-11-07 19:39:35,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:39:35,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:39:35,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:39:35,550 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 19:39:35,553 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 19:39:35,647 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:39:35,647 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:39:35,650 INFO L255 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-07 19:39:35,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:39:35,737 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-07 19:39:35,737 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:39:35,833 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-07 19:39:35,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622766283] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:39:35,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:39:35,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 13 [2024-11-07 19:39:35,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731138835] [2024-11-07 19:39:35,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:39:35,834 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-07 19:39:35,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:39:35,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-07 19:39:35,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2024-11-07 19:39:35,846 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-07 19:39:35,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 96 transitions, 1210 flow. Second operand has 14 states, 14 states have (on average 12.714285714285714) internal successors, (178), 14 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:35,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:39:35,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-07 19:39:35,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:39:37,235 INFO L124 PetriNetUnfolderBase]: 7619/13113 cut-off events. [2024-11-07 19:39:37,235 INFO L125 PetriNetUnfolderBase]: For 42488/42488 co-relation queries the response was YES. [2024-11-07 19:39:37,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39225 conditions, 13113 events. 7619/13113 cut-off events. For 42488/42488 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 85908 event pairs, 1569 based on Foata normal form. 33/11111 useless extension candidates. Maximal degree in co-relation 35866. Up to 3090 conditions per place. [2024-11-07 19:39:37,289 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 100 selfloop transitions, 82 changer transitions 99/284 dead transitions. [2024-11-07 19:39:37,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 284 transitions, 3036 flow [2024-11-07 19:39:37,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-07 19:39:37,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-07 19:39:37,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 327 transitions. [2024-11-07 19:39:37,291 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.519872813990461 [2024-11-07 19:39:37,291 INFO L175 Difference]: Start difference. First operand has 123 places, 96 transitions, 1210 flow. Second operand 17 states and 327 transitions. [2024-11-07 19:39:37,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 284 transitions, 3036 flow [2024-11-07 19:39:37,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 284 transitions, 2634 flow, removed 144 selfloop flow, removed 15 redundant places. [2024-11-07 19:39:37,411 INFO L231 Difference]: Finished difference. Result has 120 places, 127 transitions, 1709 flow [2024-11-07 19:39:37,411 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1709, PETRI_PLACES=120, PETRI_TRANSITIONS=127} [2024-11-07 19:39:37,412 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 84 predicate places. [2024-11-07 19:39:37,412 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 127 transitions, 1709 flow [2024-11-07 19:39:37,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.714285714285714) internal successors, (178), 14 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:37,413 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:39:37,413 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:39:37,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-07 19:39:37,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-07 19:39:37,614 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-07 19:39:37,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:39:37,614 INFO L85 PathProgramCache]: Analyzing trace with hash -1375562509, now seen corresponding path program 9 times [2024-11-07 19:39:37,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:39:37,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117996553] [2024-11-07 19:39:37,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:39:37,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:39:37,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:39:38,233 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-07 19:39:38,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:39:38,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117996553] [2024-11-07 19:39:38,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117996553] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:39:38,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132628687] [2024-11-07 19:39:38,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-07 19:39:38,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:39:38,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:39:38,236 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 19:39:38,238 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 19:39:38,441 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-07 19:39:38,441 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:39:38,443 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-07 19:39:38,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:39:38,774 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-07 19:39:38,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2024-11-07 19:39:38,784 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 35 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-07 19:39:38,785 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:39:38,830 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-07 19:39:38,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-11-07 19:39:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 35 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-07 19:39:39,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132628687] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:39:39,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:39:39,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2024-11-07 19:39:39,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208978685] [2024-11-07 19:39:39,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:39:39,123 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-07 19:39:39,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:39:39,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-07 19:39:39,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2024-11-07 19:39:39,199 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-07 19:39:39,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 127 transitions, 1709 flow. Second operand has 33 states, 33 states have (on average 11.242424242424242) internal successors, (371), 33 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 19:39:39,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:39:39,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-07 19:39:39,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:39:44,603 INFO L124 PetriNetUnfolderBase]: 23873/41053 cut-off events. [2024-11-07 19:39:44,603 INFO L125 PetriNetUnfolderBase]: For 102647/102647 co-relation queries the response was YES. [2024-11-07 19:39:44,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117285 conditions, 41053 events. 23873/41053 cut-off events. For 102647/102647 co-relation queries the response was YES. Maximal size of possible extension queue 1027. Compared 324551 event pairs, 1781 based on Foata normal form. 348/34996 useless extension candidates. Maximal degree in co-relation 101861. Up to 7600 conditions per place. [2024-11-07 19:39:44,822 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 352 selfloop transitions, 148 changer transitions 502/1005 dead transitions. [2024-11-07 19:39:44,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 1005 transitions, 9392 flow [2024-11-07 19:39:44,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-11-07 19:39:44,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2024-11-07 19:39:44,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 1233 transitions. [2024-11-07 19:39:44,824 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5463003987594152 [2024-11-07 19:39:44,825 INFO L175 Difference]: Start difference. First operand has 120 places, 127 transitions, 1709 flow. Second operand 61 states and 1233 transitions. [2024-11-07 19:39:44,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 1005 transitions, 9392 flow [2024-11-07 19:39:45,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 1005 transitions, 8683 flow, removed 341 selfloop flow, removed 7 redundant places. [2024-11-07 19:39:45,168 INFO L231 Difference]: Finished difference. Result has 181 places, 186 transitions, 2733 flow [2024-11-07 19:39:45,168 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1550, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=2733, PETRI_PLACES=181, PETRI_TRANSITIONS=186} [2024-11-07 19:39:45,168 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 145 predicate places. [2024-11-07 19:39:45,169 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 186 transitions, 2733 flow [2024-11-07 19:39:45,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 11.242424242424242) internal successors, (371), 33 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 19:39:45,169 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:39:45,169 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:39:45,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-07 19:39:45,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-07 19:39:45,369 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-07 19:39:45,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:39:45,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1057668857, now seen corresponding path program 10 times [2024-11-07 19:39:45,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:39:45,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806078346] [2024-11-07 19:39:45,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:39:45,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:39:45,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:39:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:39:46,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:39:46,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806078346] [2024-11-07 19:39:46,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806078346] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:39:46,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559329900] [2024-11-07 19:39:46,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-07 19:39:46,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:39:46,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:39:46,004 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 19:39:46,006 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 19:39:46,113 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-07 19:39:46,113 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:39:46,115 INFO L255 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-07 19:39:46,117 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:39:46,576 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:39:46,576 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:39:46,716 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-07 19:39:46,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2024-11-07 19:39:46,886 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-11-07 19:39:46,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559329900] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:39:46,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:39:46,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 10] total 35 [2024-11-07 19:39:46,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159537341] [2024-11-07 19:39:46,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:39:46,886 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-11-07 19:39:46,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:39:46,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-11-07 19:39:46,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1147, Unknown=0, NotChecked=0, Total=1260 [2024-11-07 19:39:46,967 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-07 19:39:46,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 186 transitions, 2733 flow. Second operand has 36 states, 36 states have (on average 11.472222222222221) internal successors, (413), 36 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:46,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:39:46,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-07 19:39:46,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:39:50,123 INFO L124 PetriNetUnfolderBase]: 12577/21663 cut-off events. [2024-11-07 19:39:50,123 INFO L125 PetriNetUnfolderBase]: For 87738/87738 co-relation queries the response was YES. [2024-11-07 19:39:50,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65626 conditions, 21663 events. 12577/21663 cut-off events. For 87738/87738 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 153353 event pairs, 1152 based on Foata normal form. 25/18306 useless extension candidates. Maximal degree in co-relation 65477. Up to 4000 conditions per place. [2024-11-07 19:39:50,307 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 156 selfloop transitions, 160 changer transitions 101/420 dead transitions. [2024-11-07 19:39:50,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 420 transitions, 4728 flow [2024-11-07 19:39:50,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-07 19:39:50,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-07 19:39:50,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 457 transitions. [2024-11-07 19:39:50,309 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5146396396396397 [2024-11-07 19:39:50,309 INFO L175 Difference]: Start difference. First operand has 181 places, 186 transitions, 2733 flow. Second operand 24 states and 457 transitions. [2024-11-07 19:39:50,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 420 transitions, 4728 flow [2024-11-07 19:39:50,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 420 transitions, 4469 flow, removed 120 selfloop flow, removed 10 redundant places. [2024-11-07 19:39:50,743 INFO L231 Difference]: Finished difference. Result has 184 places, 188 transitions, 3373 flow [2024-11-07 19:39:50,743 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2564, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=3373, PETRI_PLACES=184, PETRI_TRANSITIONS=188} [2024-11-07 19:39:50,744 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 148 predicate places. [2024-11-07 19:39:50,744 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 188 transitions, 3373 flow [2024-11-07 19:39:50,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 11.472222222222221) internal successors, (413), 36 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:50,744 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:39:50,744 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:39:50,757 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 19:39:50,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-07 19:39:50,945 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-07 19:39:50,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:39:50,945 INFO L85 PathProgramCache]: Analyzing trace with hash 430307506, now seen corresponding path program 11 times [2024-11-07 19:39:50,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:39:50,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479920162] [2024-11-07 19:39:50,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:39:50,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:39:50,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:39:51,157 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-11-07 19:39:51,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:39:51,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479920162] [2024-11-07 19:39:51,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479920162] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:39:51,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100888455] [2024-11-07 19:39:51,158 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-07 19:39:51,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:39:51,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:39:51,160 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 19:39:51,163 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 19:39:51,266 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-07 19:39:51,266 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:39:51,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-07 19:39:51,270 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:39:51,370 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-07 19:39:51,370 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:39:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-07 19:39:51,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100888455] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:39:51,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:39:51,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 16 [2024-11-07 19:39:51,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135532295] [2024-11-07 19:39:51,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:39:51,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-07 19:39:51,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:39:51,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-07 19:39:51,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2024-11-07 19:39:51,653 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-07 19:39:51,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 188 transitions, 3373 flow. Second operand has 17 states, 17 states have (on average 12.529411764705882) internal successors, (213), 17 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:51,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:39:51,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-07 19:39:51,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:39:55,421 INFO L124 PetriNetUnfolderBase]: 17515/29977 cut-off events. [2024-11-07 19:39:55,421 INFO L125 PetriNetUnfolderBase]: For 154265/154265 co-relation queries the response was YES. [2024-11-07 19:39:55,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98268 conditions, 29977 events. 17515/29977 cut-off events. For 154265/154265 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 221778 event pairs, 3039 based on Foata normal form. 33/25367 useless extension candidates. Maximal degree in co-relation 93862. Up to 6740 conditions per place. [2024-11-07 19:39:55,706 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 140 selfloop transitions, 193 changer transitions 126/462 dead transitions. [2024-11-07 19:39:55,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 462 transitions, 7084 flow [2024-11-07 19:39:55,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-07 19:39:55,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-07 19:39:55,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 404 transitions. [2024-11-07 19:39:55,707 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.51994851994852 [2024-11-07 19:39:55,707 INFO L175 Difference]: Start difference. First operand has 184 places, 188 transitions, 3373 flow. Second operand 21 states and 404 transitions. [2024-11-07 19:39:55,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 462 transitions, 7084 flow [2024-11-07 19:39:56,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 462 transitions, 6066 flow, removed 318 selfloop flow, removed 23 redundant places. [2024-11-07 19:39:56,100 INFO L231 Difference]: Finished difference. Result has 175 places, 264 transitions, 4777 flow [2024-11-07 19:39:56,100 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2787, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=4777, PETRI_PLACES=175, PETRI_TRANSITIONS=264} [2024-11-07 19:39:56,100 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 139 predicate places. [2024-11-07 19:39:56,101 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 264 transitions, 4777 flow [2024-11-07 19:39:56,101 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 12.529411764705882) internal successors, (213), 17 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:56,101 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:39:56,101 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:39:56,114 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 19:39:56,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:39:56,301 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-07 19:39:56,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:39:56,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1256696020, now seen corresponding path program 12 times [2024-11-07 19:39:56,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:39:56,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131926699] [2024-11-07 19:39:56,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:39:56,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:39:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:39:56,979 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 27 proven. 73 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-07 19:39:56,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:39:56,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131926699] [2024-11-07 19:39:56,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131926699] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:39:56,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811922377] [2024-11-07 19:39:56,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-07 19:39:56,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:39:56,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:39:56,982 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 19:39:56,984 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 19:39:57,544 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-11-07 19:39:57,544 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:39:57,546 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-07 19:39:57,547 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:39:57,674 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-07 19:39:57,674 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:39:57,718 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-07 19:39:57,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2024-11-07 19:39:57,865 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 27 proven. 48 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-07 19:39:57,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811922377] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:39:57,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:39:57,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 21 [2024-11-07 19:39:57,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749645168] [2024-11-07 19:39:57,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:39:57,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-07 19:39:57,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:39:57,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-07 19:39:57,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2024-11-07 19:39:57,899 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-07 19:39:57,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 264 transitions, 4777 flow. Second operand has 22 states, 22 states have (on average 11.954545454545455) internal successors, (263), 22 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:39:57,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:39:57,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-07 19:39:57,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:40:01,909 INFO L124 PetriNetUnfolderBase]: 18330/31308 cut-off events. [2024-11-07 19:40:01,909 INFO L125 PetriNetUnfolderBase]: For 130965/130965 co-relation queries the response was YES. [2024-11-07 19:40:02,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98545 conditions, 31308 events. 18330/31308 cut-off events. For 130965/130965 co-relation queries the response was YES. Maximal size of possible extension queue 756. Compared 230865 event pairs, 1373 based on Foata normal form. 11/26476 useless extension candidates. Maximal degree in co-relation 98429. Up to 5750 conditions per place. [2024-11-07 19:40:02,088 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 269 selfloop transitions, 247 changer transitions 45/564 dead transitions. [2024-11-07 19:40:02,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 564 transitions, 7610 flow [2024-11-07 19:40:02,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-07 19:40:02,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-07 19:40:02,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 585 transitions. [2024-11-07 19:40:02,090 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.527027027027027 [2024-11-07 19:40:02,090 INFO L175 Difference]: Start difference. First operand has 175 places, 264 transitions, 4777 flow. Second operand 30 states and 585 transitions. [2024-11-07 19:40:02,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 564 transitions, 7610 flow [2024-11-07 19:40:02,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 564 transitions, 6949 flow, removed 311 selfloop flow, removed 10 redundant places. [2024-11-07 19:40:02,470 INFO L231 Difference]: Finished difference. Result has 188 places, 297 transitions, 5412 flow [2024-11-07 19:40:02,470 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=4316, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=5412, PETRI_PLACES=188, PETRI_TRANSITIONS=297} [2024-11-07 19:40:02,471 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 152 predicate places. [2024-11-07 19:40:02,471 INFO L471 AbstractCegarLoop]: Abstraction has has 188 places, 297 transitions, 5412 flow [2024-11-07 19:40:02,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 11.954545454545455) internal successors, (263), 22 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:40:02,471 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:40:02,471 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:40:02,484 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 19:40:02,672 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:40:02,672 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-07 19:40:02,672 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:40:02,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1733637452, now seen corresponding path program 13 times [2024-11-07 19:40:02,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:40:02,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338741102] [2024-11-07 19:40:02,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:40:02,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:40:02,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:40:03,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:40:03,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338741102] [2024-11-07 19:40:03,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338741102] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:40:03,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689551701] [2024-11-07 19:40:03,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-07 19:40:03,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:40:03,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:40:03,363 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 19:40:03,365 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 19:40:03,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:03,462 INFO L255 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-07 19:40:03,463 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:40:03,839 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-07 19:40:03,839 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:40:03,979 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-07 19:40:03,979 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 11 [2024-11-07 19:40:04,108 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-07 19:40:04,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689551701] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:40:04,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:40:04,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 12, 12] total 38 [2024-11-07 19:40:04,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634372145] [2024-11-07 19:40:04,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:40:04,109 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-07 19:40:04,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:40:04,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-07 19:40:04,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2024-11-07 19:40:04,174 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-07 19:40:04,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 297 transitions, 5412 flow. Second operand has 39 states, 39 states have (on average 11.564102564102564) internal successors, (451), 39 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:40:04,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:40:04,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-07 19:40:04,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:40:09,936 INFO L124 PetriNetUnfolderBase]: 21690/37000 cut-off events. [2024-11-07 19:40:09,936 INFO L125 PetriNetUnfolderBase]: For 155328/155328 co-relation queries the response was YES. [2024-11-07 19:40:10,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114481 conditions, 37000 events. 21690/37000 cut-off events. For 155328/155328 co-relation queries the response was YES. Maximal size of possible extension queue 853. Compared 279370 event pairs, 1580 based on Foata normal form. 16/31291 useless extension candidates. Maximal degree in co-relation 114356. Up to 6800 conditions per place. [2024-11-07 19:40:10,284 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 183 selfloop transitions, 315 changer transitions 93/594 dead transitions. [2024-11-07 19:40:10,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 594 transitions, 8053 flow [2024-11-07 19:40:10,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-07 19:40:10,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-07 19:40:10,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 555 transitions. [2024-11-07 19:40:10,286 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5172413793103449 [2024-11-07 19:40:10,286 INFO L175 Difference]: Start difference. First operand has 188 places, 297 transitions, 5412 flow. Second operand 29 states and 555 transitions. [2024-11-07 19:40:10,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 594 transitions, 8053 flow [2024-11-07 19:40:11,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 594 transitions, 7438 flow, removed 68 selfloop flow, removed 15 redundant places. [2024-11-07 19:40:11,026 INFO L231 Difference]: Finished difference. Result has 212 places, 340 transitions, 6852 flow [2024-11-07 19:40:11,026 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=4802, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=273, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=6852, PETRI_PLACES=212, PETRI_TRANSITIONS=340} [2024-11-07 19:40:11,026 INFO L277 CegarLoopForPetriNet]: 36 programPoint places, 176 predicate places. [2024-11-07 19:40:11,026 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 340 transitions, 6852 flow [2024-11-07 19:40:11,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 11.564102564102564) internal successors, (451), 39 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:40:11,027 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:40:11,027 INFO L204 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:40:11,039 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 19:40:11,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:40:11,227 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-07 19:40:11,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:40:11,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1751544805, now seen corresponding path program 14 times [2024-11-07 19:40:11,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:40:11,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553594382] [2024-11-07 19:40:11,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:40:11,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:40:11,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:40:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 57 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-11-07 19:40:11,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:40:11,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553594382] [2024-11-07 19:40:11,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553594382] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:40:11,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076547857] [2024-11-07 19:40:11,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:40:11,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:40:11,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:40:11,476 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 19:40:11,478 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 19:40:11,580 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:40:11,580 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:40:11,581 INFO L255 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-07 19:40:11,583 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:40:11,701 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 47 proven. 48 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-07 19:40:11,701 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:40:11,838 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 47 proven. 48 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-11-07 19:40:11,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076547857] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:40:11,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:40:11,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 19 [2024-11-07 19:40:11,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829764338] [2024-11-07 19:40:11,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:40:11,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-07 19:40:11,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:40:11,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-07 19:40:11,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2024-11-07 19:40:11,850 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 37 [2024-11-07 19:40:11,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 340 transitions, 6852 flow. Second operand has 20 states, 20 states have (on average 12.4) internal successors, (248), 20 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:40:11,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:40:11,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 37 [2024-11-07 19:40:11,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand