./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4f9af400 extending candidate: java ['java'] extending candidate: /usr/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/oracle-jdk-bin-*/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/openjdk-*/bin/java ['java', '/usr/bin/java'] extending candidate: /usr/lib/jvm/java-*-openjdk-amd64/bin/java ['java', '/usr/bin/java', '/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java', '/usr/lib/jvm/java-17-openjdk-amd64/bin/java', '/usr/lib/jvm/java-11-openjdk-amd64/bin/java', '/usr/lib/jvm/java-1.17.0-openjdk-amd64/bin/java'] ['/root/.sdkman/candidates/java/21.0.5-tem/bin/java', '-Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config', '-Xmx15G', '-Xms4m', '-jar', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar', '-data', '@noDefault', '-ultimatedata', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data', '-tc', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml', '-i', '../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c', '-s', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf', '--cacsl2boogietranslator.entry.function', 'main', '--witnessprinter.witness.directory', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux', '--witnessprinter.witness.filename', 'witness', '--witnessprinter.write.witness.besides.input.file', 'false', '--witnessprinter.graph.data.specification', 'CHECK( init(main()), LTL(G valid-free) )\nCHECK( init(main()), LTL(G valid-deref) )\nCHECK( init(main()), LTL(G valid-memtrack) )\n\n', '--witnessprinter.graph.data.producer', 'Automizer', '--witnessprinter.graph.data.architecture', '32bit', '--witnessprinter.graph.data.programhash', '2e9e4bd6e9b16aa5f22ad2335ca34ba741869a12ab5a04a80108cf42ed170c0f'] Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2e9e4bd6e9b16aa5f22ad2335ca34ba741869a12ab5a04a80108cf42ed170c0f --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-07 19:32:55,931 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-07 19:32:56,006 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-07 19:32:56,011 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-07 19:32:56,012 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-07 19:32:56,033 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-07 19:32:56,034 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-07 19:32:56,034 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-07 19:32:56,036 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-07 19:32:56,037 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-07 19:32:56,037 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-07 19:32:56,037 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-07 19:32:56,037 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-07 19:32:56,038 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-07 19:32:56,038 INFO L153 SettingsManager]: * Use SBE=true [2024-11-07 19:32:56,038 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-07 19:32:56,038 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-07 19:32:56,038 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-07 19:32:56,039 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-07 19:32:56,039 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-07 19:32:56,039 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-07 19:32:56,039 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-07 19:32:56,039 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-07 19:32:56,039 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-07 19:32:56,039 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-07 19:32:56,039 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-07 19:32:56,039 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-07 19:32:56,039 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-07 19:32:56,039 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-07 19:32:56,039 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-07 19:32:56,039 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-07 19:32:56,039 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-07 19:32:56,039 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-07 19:32:56,039 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:32:56,039 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-07 19:32:56,039 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-07 19:32:56,039 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-07 19:32:56,040 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-07 19:32:56,040 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-07 19:32:56,040 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-07 19:32:56,040 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-07 19:32:56,040 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-07 19:32:56,040 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 -> 2e9e4bd6e9b16aa5f22ad2335ca34ba741869a12ab5a04a80108cf42ed170c0f [2024-11-07 19:32:56,267 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-07 19:32:56,273 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-07 19:32:56,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-07 19:32:56,275 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-07 19:32:56,275 INFO L274 PluginConnector]: CDTParser initialized [2024-11-07 19:32:56,278 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2024-11-07 19:32:57,350 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-07 19:32:57,524 INFO L384 CDTParser]: Found 1 translation units. [2024-11-07 19:32:57,525 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2024-11-07 19:32:57,530 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/7dc61a515/b23c4ae42edf4b0d98a87f42cbdc932c/FLAG81df5e6e2 [2024-11-07 19:32:57,917 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/7dc61a515/b23c4ae42edf4b0d98a87f42cbdc932c [2024-11-07 19:32:57,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-07 19:32:57,924 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-07 19:32:57,926 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-07 19:32:57,926 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-07 19:32:57,929 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-07 19:32:57,930 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:32:57" (1/1) ... [2024-11-07 19:32:57,930 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69a5fe9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:32:57, skipping insertion in model container [2024-11-07 19:32:57,931 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:32:57" (1/1) ... [2024-11-07 19:32:57,946 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-07 19:32:58,077 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 19:32:58,083 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:32:58,090 INFO L200 MainTranslator]: Completed pre-run [2024-11-07 19:32:58,110 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:32:58,126 INFO L204 MainTranslator]: Completed translation [2024-11-07 19:32:58,126 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:32:58 WrapperNode [2024-11-07 19:32:58,126 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-07 19:32:58,127 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-07 19:32:58,127 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-07 19:32:58,127 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-07 19:32:58,131 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:32:58" (1/1) ... [2024-11-07 19:32:58,137 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:32:58" (1/1) ... [2024-11-07 19:32:58,161 INFO L138 Inliner]: procedures = 25, calls = 60, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 313 [2024-11-07 19:32:58,162 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-07 19:32:58,162 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-07 19:32:58,162 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-07 19:32:58,162 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-07 19:32:58,169 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:32:58" (1/1) ... [2024-11-07 19:32:58,169 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:32:58" (1/1) ... [2024-11-07 19:32:58,177 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:32:58" (1/1) ... [2024-11-07 19:32:58,197 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-07 19:32:58,197 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:32:58" (1/1) ... [2024-11-07 19:32:58,197 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:32:58" (1/1) ... [2024-11-07 19:32:58,203 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:32:58" (1/1) ... [2024-11-07 19:32:58,206 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:32:58" (1/1) ... [2024-11-07 19:32:58,207 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:32:58" (1/1) ... [2024-11-07 19:32:58,210 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:32:58" (1/1) ... [2024-11-07 19:32:58,211 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-07 19:32:58,213 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-07 19:32:58,213 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-07 19:32:58,213 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-07 19:32:58,213 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:32:58" (1/1) ... [2024-11-07 19:32:58,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:32:58,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:32:58,238 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 19:32:58,240 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 19:32:58,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-07 19:32:58,261 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-07 19:32:58,261 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-07 19:32:58,261 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-07 19:32:58,261 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-07 19:32:58,261 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-07 19:32:58,261 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-07 19:32:58,261 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-07 19:32:58,261 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-07 19:32:58,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-07 19:32:58,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-07 19:32:58,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-07 19:32:58,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-07 19:32:58,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-07 19:32:58,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-07 19:32:58,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-07 19:32:58,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-07 19:32:58,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-07 19:32:58,262 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-07 19:32:58,262 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-07 19:32:58,263 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 19:32:58,346 INFO L238 CfgBuilder]: Building ICFG [2024-11-07 19:32:58,347 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-07 19:32:58,709 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-07 19:32:58,710 INFO L287 CfgBuilder]: Performing block encoding [2024-11-07 19:32:59,037 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-07 19:32:59,038 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-07 19:32:59,038 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:32:59 BoogieIcfgContainer [2024-11-07 19:32:59,038 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-07 19:32:59,040 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-07 19:32:59,040 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-07 19:32:59,044 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-07 19:32:59,044 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:32:57" (1/3) ... [2024-11-07 19:32:59,044 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a73c776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:32:59, skipping insertion in model container [2024-11-07 19:32:59,044 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:32:58" (2/3) ... [2024-11-07 19:32:59,044 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a73c776 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:32:59, skipping insertion in model container [2024-11-07 19:32:59,045 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:32:59" (3/3) ... [2024-11-07 19:32:59,045 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt.wvr.c [2024-11-07 19:32:59,056 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-07 19:32:59,056 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-11-07 19:32:59,057 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-07 19:32:59,110 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-07 19:32:59,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 66 transitions, 160 flow [2024-11-07 19:32:59,173 INFO L124 PetriNetUnfolderBase]: 6/62 cut-off events. [2024-11-07 19:32:59,174 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-07 19:32:59,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 62 events. 6/62 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 155 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2024-11-07 19:32:59,177 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 66 transitions, 160 flow [2024-11-07 19:32:59,180 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 61 transitions, 146 flow [2024-11-07 19:32:59,185 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 19:32:59,194 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;@1793ee03, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 19:32:59,194 INFO L334 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2024-11-07 19:32:59,200 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 19:32:59,200 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-07 19:32:59,200 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 19:32:59,200 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:32:59,201 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:32:59,201 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:32:59,205 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:32:59,205 INFO L85 PathProgramCache]: Analyzing trace with hash 892478, now seen corresponding path program 1 times [2024-11-07 19:32:59,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:32:59,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683309851] [2024-11-07 19:32:59,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:32:59,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:32:59,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:32:59,401 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 19:32:59,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:32:59,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683309851] [2024-11-07 19:32:59,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683309851] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:32:59,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:32:59,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-07 19:32:59,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078539178] [2024-11-07 19:32:59,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:32:59,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:32:59,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:32:59,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:32:59,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:32:59,441 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-07 19:32:59,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:32:59,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:32:59,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-07 19:32:59,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:00,717 INFO L124 PetriNetUnfolderBase]: 9651/13484 cut-off events. [2024-11-07 19:33:00,718 INFO L125 PetriNetUnfolderBase]: For 298/298 co-relation queries the response was YES. [2024-11-07 19:33:00,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26018 conditions, 13484 events. 9651/13484 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 1096. Compared 88202 event pairs, 6408 based on Foata normal form. 1/7906 useless extension candidates. Maximal degree in co-relation 24428. Up to 11896 conditions per place. [2024-11-07 19:33:00,806 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 36 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2024-11-07 19:33:00,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 57 transitions, 214 flow [2024-11-07 19:33:00,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:33:00,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:33:00,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 113 transitions. [2024-11-07 19:33:00,817 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5707070707070707 [2024-11-07 19:33:00,818 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 146 flow. Second operand 3 states and 113 transitions. [2024-11-07 19:33:00,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 57 transitions, 214 flow [2024-11-07 19:33:00,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 57 transitions, 198 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-07 19:33:00,865 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 126 flow [2024-11-07 19:33:00,867 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2024-11-07 19:33:00,870 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -10 predicate places. [2024-11-07 19:33:00,871 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 126 flow [2024-11-07 19:33:00,871 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:00,871 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:00,871 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:33:00,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-07 19:33:00,871 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:00,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:00,872 INFO L85 PathProgramCache]: Analyzing trace with hash 892479, now seen corresponding path program 1 times [2024-11-07 19:33:00,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:00,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596802121] [2024-11-07 19:33:00,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:00,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:00,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:01,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:01,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:01,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596802121] [2024-11-07 19:33:01,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596802121] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:01,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:01,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:33:01,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455104197] [2024-11-07 19:33:01,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:01,128 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:33:01,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:01,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:33:01,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:33:01,143 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-07 19:33:01,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:01,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:01,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-07 19:33:01,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:02,087 INFO L124 PetriNetUnfolderBase]: 9652/13487 cut-off events. [2024-11-07 19:33:02,088 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-11-07 19:33:02,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25621 conditions, 13487 events. 9652/13487 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 1096. Compared 88350 event pairs, 6408 based on Foata normal form. 0/7906 useless extension candidates. Maximal degree in co-relation 25592. Up to 11905 conditions per place. [2024-11-07 19:33:02,172 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 39 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2024-11-07 19:33:02,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 60 transitions, 218 flow [2024-11-07 19:33:02,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:33:02,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:33:02,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 140 transitions. [2024-11-07 19:33:02,174 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5303030303030303 [2024-11-07 19:33:02,175 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 126 flow. Second operand 4 states and 140 transitions. [2024-11-07 19:33:02,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 60 transitions, 218 flow [2024-11-07 19:33:02,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 60 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:33:02,177 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 149 flow [2024-11-07 19:33:02,178 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=149, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2024-11-07 19:33:02,179 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -7 predicate places. [2024-11-07 19:33:02,179 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 149 flow [2024-11-07 19:33:02,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:02,179 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:02,179 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-07 19:33:02,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-07 19:33:02,179 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:02,180 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:02,180 INFO L85 PathProgramCache]: Analyzing trace with hash 27668907, now seen corresponding path program 1 times [2024-11-07 19:33:02,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:02,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049630340] [2024-11-07 19:33:02,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:02,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:02,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:02,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:02,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:02,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049630340] [2024-11-07 19:33:02,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049630340] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:02,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:02,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:33:02,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037187107] [2024-11-07 19:33:02,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:02,376 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:33:02,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:02,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:33:02,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:33:02,390 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-07 19:33:02,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 149 flow. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:02,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:02,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-07 19:33:02,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:03,151 INFO L124 PetriNetUnfolderBase]: 9653/13490 cut-off events. [2024-11-07 19:33:03,151 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-11-07 19:33:03,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25638 conditions, 13490 events. 9653/13490 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 1096. Compared 88382 event pairs, 6408 based on Foata normal form. 0/7908 useless extension candidates. Maximal degree in co-relation 25613. Up to 11904 conditions per place. [2024-11-07 19:33:03,213 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 39 selfloop transitions, 7 changer transitions 0/63 dead transitions. [2024-11-07 19:33:03,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 63 transitions, 247 flow [2024-11-07 19:33:03,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:33:03,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:33:03,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2024-11-07 19:33:03,214 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5060606060606061 [2024-11-07 19:33:03,214 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 149 flow. Second operand 5 states and 167 transitions. [2024-11-07 19:33:03,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 63 transitions, 247 flow [2024-11-07 19:33:03,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 63 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:33:03,215 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 183 flow [2024-11-07 19:33:03,215 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=183, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-11-07 19:33:03,216 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -2 predicate places. [2024-11-07 19:33:03,216 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 183 flow [2024-11-07 19:33:03,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:03,216 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:03,216 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-07 19:33:03,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-07 19:33:03,216 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:03,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:03,216 INFO L85 PathProgramCache]: Analyzing trace with hash 857701820, now seen corresponding path program 1 times [2024-11-07 19:33:03,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:03,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102697861] [2024-11-07 19:33:03,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:03,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:03,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:03,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:03,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102697861] [2024-11-07 19:33:03,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102697861] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:33:03,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441285546] [2024-11-07 19:33:03,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:03,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:03,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:33:03,405 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:33:03,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-07 19:33:03,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:03,474 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-07 19:33:03,476 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:33:03,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-07 19:33:03,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:03,726 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:33:03,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:03,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441285546] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:33:03,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:33:03,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-07 19:33:03,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829595024] [2024-11-07 19:33:03,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:33:03,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-07 19:33:03,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:03,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-07 19:33:03,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-07 19:33:03,886 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-07 19:33:03,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 183 flow. Second operand has 11 states, 11 states have (on average 25.363636363636363) internal successors, (279), 11 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:03,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:03,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-07 19:33:03,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:04,927 INFO L124 PetriNetUnfolderBase]: 9653/13489 cut-off events. [2024-11-07 19:33:04,927 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-07 19:33:04,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25651 conditions, 13489 events. 9653/13489 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 1096. Compared 88101 event pairs, 6408 based on Foata normal form. 0/7910 useless extension candidates. Maximal degree in co-relation 25623. Up to 11904 conditions per place. [2024-11-07 19:33:05,004 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 38 selfloop transitions, 7 changer transitions 0/62 dead transitions. [2024-11-07 19:33:05,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 62 transitions, 269 flow [2024-11-07 19:33:05,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:33:05,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:33:05,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-11-07 19:33:05,009 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-11-07 19:33:05,009 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 183 flow. Second operand 6 states and 187 transitions. [2024-11-07 19:33:05,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 62 transitions, 269 flow [2024-11-07 19:33:05,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 62 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:33:05,011 INFO L231 Difference]: Finished difference. Result has 69 places, 62 transitions, 192 flow [2024-11-07 19:33:05,011 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=69, PETRI_TRANSITIONS=62} [2024-11-07 19:33:05,011 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 1 predicate places. [2024-11-07 19:33:05,011 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 62 transitions, 192 flow [2024-11-07 19:33:05,012 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 25.363636363636363) internal successors, (279), 11 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:05,012 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:05,012 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-07 19:33:05,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-07 19:33:05,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:05,213 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:05,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:05,213 INFO L85 PathProgramCache]: Analyzing trace with hash 820044476, now seen corresponding path program 1 times [2024-11-07 19:33:05,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:05,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643530591] [2024-11-07 19:33:05,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:05,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:05,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:05,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:05,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:05,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643530591] [2024-11-07 19:33:05,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643530591] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:33:05,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701844171] [2024-11-07 19:33:05,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:05,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:05,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:33:05,411 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:33:05,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-07 19:33:05,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:05,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-07 19:33:05,483 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:33:05,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-07 19:33:05,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:05,605 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:33:05,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:05,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701844171] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:33:05,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:33:05,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-07 19:33:05,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536231992] [2024-11-07 19:33:05,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:33:05,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-07 19:33:05,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:05,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-07 19:33:05,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-07 19:33:05,782 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-07 19:33:05,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 62 transitions, 192 flow. Second operand has 13 states, 13 states have (on average 25.307692307692307) internal successors, (329), 13 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:05,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:05,782 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-07 19:33:05,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:06,690 INFO L124 PetriNetUnfolderBase]: 9653/13488 cut-off events. [2024-11-07 19:33:06,690 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-07 19:33:06,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25655 conditions, 13488 events. 9653/13488 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 1096. Compared 88257 event pairs, 6408 based on Foata normal form. 0/7910 useless extension candidates. Maximal degree in co-relation 25622. Up to 11896 conditions per place. [2024-11-07 19:33:06,754 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 32 selfloop transitions, 12 changer transitions 0/61 dead transitions. [2024-11-07 19:33:06,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 61 transitions, 276 flow [2024-11-07 19:33:06,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-07 19:33:06,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-07 19:33:06,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-11-07 19:33:06,756 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-11-07 19:33:06,756 INFO L175 Difference]: Start difference. First operand has 69 places, 62 transitions, 192 flow. Second operand 7 states and 213 transitions. [2024-11-07 19:33:06,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 61 transitions, 276 flow [2024-11-07 19:33:06,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 61 transitions, 242 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-11-07 19:33:06,759 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 178 flow [2024-11-07 19:33:06,759 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=178, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2024-11-07 19:33:06,761 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -2 predicate places. [2024-11-07 19:33:06,761 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 178 flow [2024-11-07 19:33:06,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 25.307692307692307) internal successors, (329), 13 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:06,761 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:06,761 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:06,773 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 19:33:06,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:06,966 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:06,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:06,966 INFO L85 PathProgramCache]: Analyzing trace with hash -2134544703, now seen corresponding path program 1 times [2024-11-07 19:33:06,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:06,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763976201] [2024-11-07 19:33:06,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:06,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:06,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:07,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:07,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:07,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763976201] [2024-11-07 19:33:07,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763976201] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:07,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:07,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:33:07,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689005168] [2024-11-07 19:33:07,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:07,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:33:07,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:07,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:33:07,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:33:07,034 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-07 19:33:07,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 178 flow. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:07,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:07,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-07 19:33:07,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:07,725 INFO L124 PetriNetUnfolderBase]: 10696/14779 cut-off events. [2024-11-07 19:33:07,725 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-07 19:33:07,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28409 conditions, 14779 events. 10696/14779 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 1147. Compared 96591 event pairs, 7188 based on Foata normal form. 298/9032 useless extension candidates. Maximal degree in co-relation 25256. Up to 11905 conditions per place. [2024-11-07 19:33:07,787 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 69 selfloop transitions, 5 changer transitions 0/91 dead transitions. [2024-11-07 19:33:07,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 91 transitions, 420 flow [2024-11-07 19:33:07,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:33:07,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:33:07,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 207 transitions. [2024-11-07 19:33:07,788 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6272727272727273 [2024-11-07 19:33:07,788 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 178 flow. Second operand 5 states and 207 transitions. [2024-11-07 19:33:07,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 91 transitions, 420 flow [2024-11-07 19:33:07,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 91 transitions, 381 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-07 19:33:07,790 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 192 flow [2024-11-07 19:33:07,790 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=192, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2024-11-07 19:33:07,790 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -1 predicate places. [2024-11-07 19:33:07,790 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 192 flow [2024-11-07 19:33:07,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:07,790 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:07,790 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:07,790 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-07 19:33:07,791 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:07,791 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:07,791 INFO L85 PathProgramCache]: Analyzing trace with hash -296438428, now seen corresponding path program 1 times [2024-11-07 19:33:07,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:07,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652938713] [2024-11-07 19:33:07,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:07,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:07,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:07,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:33:07,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:07,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652938713] [2024-11-07 19:33:07,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652938713] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:07,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:07,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:33:07,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458033317] [2024-11-07 19:33:07,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:07,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:33:07,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:07,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:33:07,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:33:07,919 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-07 19:33:07,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:07,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:07,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-07 19:33:07,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:08,431 INFO L124 PetriNetUnfolderBase]: 7339/10713 cut-off events. [2024-11-07 19:33:08,431 INFO L125 PetriNetUnfolderBase]: For 1020/1020 co-relation queries the response was YES. [2024-11-07 19:33:08,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22212 conditions, 10713 events. 7339/10713 cut-off events. For 1020/1020 co-relation queries the response was YES. Maximal size of possible extension queue 804. Compared 73007 event pairs, 5000 based on Foata normal form. 0/6785 useless extension candidates. Maximal degree in co-relation 19084. Up to 9261 conditions per place. [2024-11-07 19:33:08,469 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 38 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2024-11-07 19:33:08,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 61 transitions, 272 flow [2024-11-07 19:33:08,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:33:08,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:33:08,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-11-07 19:33:08,470 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47878787878787876 [2024-11-07 19:33:08,470 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 192 flow. Second operand 5 states and 158 transitions. [2024-11-07 19:33:08,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 61 transitions, 272 flow [2024-11-07 19:33:08,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 61 transitions, 267 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:33:08,472 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 191 flow [2024-11-07 19:33:08,472 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=191, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2024-11-07 19:33:08,473 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -1 predicate places. [2024-11-07 19:33:08,473 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 191 flow [2024-11-07 19:33:08,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:08,473 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:08,473 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:08,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-07 19:33:08,473 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:08,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:08,474 INFO L85 PathProgramCache]: Analyzing trace with hash -296438427, now seen corresponding path program 1 times [2024-11-07 19:33:08,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:08,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652030869] [2024-11-07 19:33:08,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:08,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:08,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:08,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:08,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:08,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652030869] [2024-11-07 19:33:08,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652030869] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:33:08,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540460926] [2024-11-07 19:33:08,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:08,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:08,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:33:08,616 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:33:08,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-07 19:33:08,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:08,689 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-07 19:33:08,690 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:33:08,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-07 19:33:08,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-07 19:33:08,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-07 19:33:08,747 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-07 19:33:08,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-07 19:33:08,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:08,764 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-07 19:33:08,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540460926] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:08,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-07 19:33:08,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-07 19:33:08,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872223397] [2024-11-07 19:33:08,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:08,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:33:08,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:08,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:33:08,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-07 19:33:08,779 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-07 19:33:08,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 191 flow. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:08,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:08,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-07 19:33:08,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:09,098 INFO L124 PetriNetUnfolderBase]: 4701/7063 cut-off events. [2024-11-07 19:33:09,099 INFO L125 PetriNetUnfolderBase]: For 804/804 co-relation queries the response was YES. [2024-11-07 19:33:09,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14076 conditions, 7063 events. 4701/7063 cut-off events. For 804/804 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 47471 event pairs, 3256 based on Foata normal form. 0/4989 useless extension candidates. Maximal degree in co-relation 10914. Up to 6049 conditions per place. [2024-11-07 19:33:09,126 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 39 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2024-11-07 19:33:09,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 59 transitions, 267 flow [2024-11-07 19:33:09,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:33:09,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:33:09,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-11-07 19:33:09,127 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-07 19:33:09,127 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 191 flow. Second operand 4 states and 132 transitions. [2024-11-07 19:33:09,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 59 transitions, 267 flow [2024-11-07 19:33:09,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 59 transitions, 258 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:33:09,128 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 180 flow [2024-11-07 19:33:09,129 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-11-07 19:33:09,129 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -3 predicate places. [2024-11-07 19:33:09,129 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 180 flow [2024-11-07 19:33:09,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:09,129 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:09,129 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:09,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-07 19:33:09,329 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:09,330 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:09,330 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:09,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1161509022, now seen corresponding path program 1 times [2024-11-07 19:33:09,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:09,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221625210] [2024-11-07 19:33:09,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:09,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:09,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:09,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:09,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221625210] [2024-11-07 19:33:09,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221625210] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:09,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:09,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:33:09,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079601605] [2024-11-07 19:33:09,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:09,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:33:09,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:09,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:33:09,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:33:09,375 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-07 19:33:09,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:09,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:09,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-07 19:33:09,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:09,757 INFO L124 PetriNetUnfolderBase]: 3151/5000 cut-off events. [2024-11-07 19:33:09,758 INFO L125 PetriNetUnfolderBase]: For 565/565 co-relation queries the response was YES. [2024-11-07 19:33:09,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9801 conditions, 5000 events. 3151/5000 cut-off events. For 565/565 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 33845 event pairs, 2196 based on Foata normal form. 0/3932 useless extension candidates. Maximal degree in co-relation 7627. Up to 4084 conditions per place. [2024-11-07 19:33:09,785 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 36 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2024-11-07 19:33:09,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 57 transitions, 256 flow [2024-11-07 19:33:09,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:33:09,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:33:09,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-11-07 19:33:09,786 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2024-11-07 19:33:09,786 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 180 flow. Second operand 4 states and 130 transitions. [2024-11-07 19:33:09,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 57 transitions, 256 flow [2024-11-07 19:33:09,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 57 transitions, 252 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:33:09,788 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 180 flow [2024-11-07 19:33:09,788 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2024-11-07 19:33:09,788 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -4 predicate places. [2024-11-07 19:33:09,789 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 180 flow [2024-11-07 19:33:09,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:09,789 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:09,789 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:09,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-07 19:33:09,789 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:09,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:09,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1161509023, now seen corresponding path program 1 times [2024-11-07 19:33:09,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:09,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549392901] [2024-11-07 19:33:09,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:09,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:09,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:09,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:09,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549392901] [2024-11-07 19:33:09,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549392901] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:09,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:09,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:33:09,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161000733] [2024-11-07 19:33:09,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:09,852 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:33:09,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:09,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:33:09,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:33:09,857 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-07 19:33:09,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:09,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:09,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-07 19:33:09,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:10,334 INFO L124 PetriNetUnfolderBase]: 3669/5895 cut-off events. [2024-11-07 19:33:10,334 INFO L125 PetriNetUnfolderBase]: For 683/683 co-relation queries the response was YES. [2024-11-07 19:33:10,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11668 conditions, 5895 events. 3669/5895 cut-off events. For 683/683 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 41164 event pairs, 2627 based on Foata normal form. 128/4903 useless extension candidates. Maximal degree in co-relation 9111. Up to 4094 conditions per place. [2024-11-07 19:33:10,364 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 54 selfloop transitions, 6 changer transitions 0/77 dead transitions. [2024-11-07 19:33:10,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 77 transitions, 352 flow [2024-11-07 19:33:10,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:33:10,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:33:10,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 163 transitions. [2024-11-07 19:33:10,365 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6174242424242424 [2024-11-07 19:33:10,365 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 180 flow. Second operand 4 states and 163 transitions. [2024-11-07 19:33:10,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 77 transitions, 352 flow [2024-11-07 19:33:10,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 77 transitions, 347 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:33:10,366 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 197 flow [2024-11-07 19:33:10,367 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=197, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2024-11-07 19:33:10,367 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -2 predicate places. [2024-11-07 19:33:10,367 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 197 flow [2024-11-07 19:33:10,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:10,367 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:10,367 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:10,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-07 19:33:10,367 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:10,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:10,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1396119792, now seen corresponding path program 1 times [2024-11-07 19:33:10,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:10,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090344638] [2024-11-07 19:33:10,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:10,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:10,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:10,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:10,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:10,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090344638] [2024-11-07 19:33:10,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090344638] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:10,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:10,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:33:10,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284642116] [2024-11-07 19:33:10,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:10,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:33:10,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:10,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:33:10,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:33:10,572 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-07 19:33:10,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 197 flow. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:10,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:10,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-07 19:33:10,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:10,830 INFO L124 PetriNetUnfolderBase]: 2429/4116 cut-off events. [2024-11-07 19:33:10,830 INFO L125 PetriNetUnfolderBase]: For 957/957 co-relation queries the response was YES. [2024-11-07 19:33:10,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8569 conditions, 4116 events. 2429/4116 cut-off events. For 957/957 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 28790 event pairs, 1773 based on Foata normal form. 0/3544 useless extension candidates. Maximal degree in co-relation 6637. Up to 3292 conditions per place. [2024-11-07 19:33:10,847 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 33 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-11-07 19:33:10,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 55 transitions, 265 flow [2024-11-07 19:33:10,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:33:10,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:33:10,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 136 transitions. [2024-11-07 19:33:10,847 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2024-11-07 19:33:10,848 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 197 flow. Second operand 4 states and 136 transitions. [2024-11-07 19:33:10,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 55 transitions, 265 flow [2024-11-07 19:33:10,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 55 transitions, 261 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:33:10,849 INFO L231 Difference]: Finished difference. Result has 66 places, 55 transitions, 195 flow [2024-11-07 19:33:10,849 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=195, PETRI_PLACES=66, PETRI_TRANSITIONS=55} [2024-11-07 19:33:10,850 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -2 predicate places. [2024-11-07 19:33:10,850 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 55 transitions, 195 flow [2024-11-07 19:33:10,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:10,850 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:10,850 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:10,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-07 19:33:10,850 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:10,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:10,850 INFO L85 PathProgramCache]: Analyzing trace with hash 270405486, now seen corresponding path program 1 times [2024-11-07 19:33:10,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:10,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452279086] [2024-11-07 19:33:10,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:10,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:10,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:10,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:10,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452279086] [2024-11-07 19:33:10,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452279086] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:10,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:10,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:33:10,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922947888] [2024-11-07 19:33:10,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:10,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:33:10,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:10,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:33:10,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:33:10,958 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-07 19:33:10,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 55 transitions, 195 flow. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:10,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:10,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-07 19:33:10,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:11,292 INFO L124 PetriNetUnfolderBase]: 3348/5287 cut-off events. [2024-11-07 19:33:11,292 INFO L125 PetriNetUnfolderBase]: For 1202/1202 co-relation queries the response was YES. [2024-11-07 19:33:11,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11508 conditions, 5287 events. 3348/5287 cut-off events. For 1202/1202 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 35098 event pairs, 322 based on Foata normal form. 252/5391 useless extension candidates. Maximal degree in co-relation 9860. Up to 2532 conditions per place. [2024-11-07 19:33:11,307 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 62 selfloop transitions, 5 changer transitions 3/85 dead transitions. [2024-11-07 19:33:11,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 85 transitions, 415 flow [2024-11-07 19:33:11,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:33:11,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:33:11,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 183 transitions. [2024-11-07 19:33:11,307 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5545454545454546 [2024-11-07 19:33:11,308 INFO L175 Difference]: Start difference. First operand has 66 places, 55 transitions, 195 flow. Second operand 5 states and 183 transitions. [2024-11-07 19:33:11,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 85 transitions, 415 flow [2024-11-07 19:33:11,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 85 transitions, 408 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:33:11,309 INFO L231 Difference]: Finished difference. Result has 69 places, 53 transitions, 177 flow [2024-11-07 19:33:11,309 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=177, PETRI_PLACES=69, PETRI_TRANSITIONS=53} [2024-11-07 19:33:11,310 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 1 predicate places. [2024-11-07 19:33:11,310 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 53 transitions, 177 flow [2024-11-07 19:33:11,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:11,310 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:11,310 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:11,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-07 19:33:11,310 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:11,310 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:11,310 INFO L85 PathProgramCache]: Analyzing trace with hash -608167966, now seen corresponding path program 1 times [2024-11-07 19:33:11,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:11,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876379216] [2024-11-07 19:33:11,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:11,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:11,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:33:11,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:11,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876379216] [2024-11-07 19:33:11,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876379216] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:11,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:11,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:33:11,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783717033] [2024-11-07 19:33:11,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:11,440 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:33:11,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:11,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:33:11,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:33:11,454 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-07 19:33:11,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 53 transitions, 177 flow. Second operand has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 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 19:33:11,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:11,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-07 19:33:11,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:11,846 INFO L124 PetriNetUnfolderBase]: 4867/7104 cut-off events. [2024-11-07 19:33:11,846 INFO L125 PetriNetUnfolderBase]: For 2540/2814 co-relation queries the response was YES. [2024-11-07 19:33:11,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16867 conditions, 7104 events. 4867/7104 cut-off events. For 2540/2814 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 43695 event pairs, 473 based on Foata normal form. 515/7527 useless extension candidates. Maximal degree in co-relation 16839. Up to 4100 conditions per place. [2024-11-07 19:33:11,874 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 72 selfloop transitions, 8 changer transitions 0/95 dead transitions. [2024-11-07 19:33:11,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 463 flow [2024-11-07 19:33:11,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:33:11,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:33:11,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 219 transitions. [2024-11-07 19:33:11,875 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.553030303030303 [2024-11-07 19:33:11,875 INFO L175 Difference]: Start difference. First operand has 69 places, 53 transitions, 177 flow. Second operand 6 states and 219 transitions. [2024-11-07 19:33:11,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 463 flow [2024-11-07 19:33:11,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 95 transitions, 448 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-07 19:33:11,877 INFO L231 Difference]: Finished difference. Result has 71 places, 58 transitions, 221 flow [2024-11-07 19:33:11,877 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=221, PETRI_PLACES=71, PETRI_TRANSITIONS=58} [2024-11-07 19:33:11,878 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2024-11-07 19:33:11,878 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 58 transitions, 221 flow [2024-11-07 19:33:11,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 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 19:33:11,878 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:11,878 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:11,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-07 19:33:11,878 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:11,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:11,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1652199652, now seen corresponding path program 2 times [2024-11-07 19:33:11,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:11,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704545620] [2024-11-07 19:33:11,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:11,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:11,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:11,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:33:11,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:11,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704545620] [2024-11-07 19:33:11,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704545620] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:33:11,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304904151] [2024-11-07 19:33:11,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:33:11,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:11,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:33:11,980 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:33:11,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-07 19:33:12,061 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:33:12,061 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:33:12,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-07 19:33:12,063 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:33:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:33:12,130 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:33:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:33:12,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304904151] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-07 19:33:12,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-07 19:33:12,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2024-11-07 19:33:12,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020047767] [2024-11-07 19:33:12,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:12,172 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:33:12,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:12,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:33:12,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-07 19:33:12,178 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 66 [2024-11-07 19:33:12,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 58 transitions, 221 flow. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:12,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:12,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 66 [2024-11-07 19:33:12,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:13,008 INFO L124 PetriNetUnfolderBase]: 10308/14602 cut-off events. [2024-11-07 19:33:13,008 INFO L125 PetriNetUnfolderBase]: For 9210/9572 co-relation queries the response was YES. [2024-11-07 19:33:13,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38994 conditions, 14602 events. 10308/14602 cut-off events. For 9210/9572 co-relation queries the response was YES. Maximal size of possible extension queue 888. Compared 93078 event pairs, 953 based on Foata normal form. 559/14856 useless extension candidates. Maximal degree in co-relation 38964. Up to 5305 conditions per place. [2024-11-07 19:33:13,065 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 90 selfloop transitions, 12 changer transitions 0/116 dead transitions. [2024-11-07 19:33:13,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 116 transitions, 631 flow [2024-11-07 19:33:13,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:33:13,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:33:13,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 224 transitions. [2024-11-07 19:33:13,066 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5656565656565656 [2024-11-07 19:33:13,066 INFO L175 Difference]: Start difference. First operand has 71 places, 58 transitions, 221 flow. Second operand 6 states and 224 transitions. [2024-11-07 19:33:13,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 116 transitions, 631 flow [2024-11-07 19:33:13,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 116 transitions, 624 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:33:13,072 INFO L231 Difference]: Finished difference. Result has 78 places, 67 transitions, 319 flow [2024-11-07 19:33:13,072 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=319, PETRI_PLACES=78, PETRI_TRANSITIONS=67} [2024-11-07 19:33:13,073 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 10 predicate places. [2024-11-07 19:33:13,073 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 67 transitions, 319 flow [2024-11-07 19:33:13,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:13,073 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:13,073 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:13,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-07 19:33:13,273 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,SelfDestructingSolverStorable13 [2024-11-07 19:33:13,273 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:13,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:13,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1402417194, now seen corresponding path program 1 times [2024-11-07 19:33:13,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:13,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294990102] [2024-11-07 19:33:13,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:13,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:13,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:13,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294990102] [2024-11-07 19:33:13,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294990102] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:33:13,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372435380] [2024-11-07 19:33:13,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:13,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:13,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:33:13,634 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:33:13,635 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-07 19:33:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:13,722 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-07 19:33:13,724 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:33:13,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 1 [2024-11-07 19:33:13,887 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 5 treesize of output 3 [2024-11-07 19:33:13,891 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 10 treesize of output 8 [2024-11-07 19:33:14,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 7 [2024-11-07 19:33:14,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:14,016 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:33:14,121 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 6 treesize of output 4 [2024-11-07 19:33:14,126 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 10 treesize of output 8 [2024-11-07 19:33:14,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 39 treesize of output 35 [2024-11-07 19:33:14,453 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 47 treesize of output 35 [2024-11-07 19:33:14,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:14,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372435380] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:33:14,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:33:14,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-07 19:33:14,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862944508] [2024-11-07 19:33:14,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:33:14,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-07 19:33:14,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:14,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-07 19:33:14,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2024-11-07 19:33:14,676 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-07 19:33:14,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 67 transitions, 319 flow. Second operand has 18 states, 18 states have (on average 29.72222222222222) internal successors, (535), 18 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:14,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:14,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-07 19:33:14,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:17,163 INFO L124 PetriNetUnfolderBase]: 17601/27692 cut-off events. [2024-11-07 19:33:17,165 INFO L125 PetriNetUnfolderBase]: For 47796/50043 co-relation queries the response was YES. [2024-11-07 19:33:17,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84069 conditions, 27692 events. 17601/27692 cut-off events. For 47796/50043 co-relation queries the response was YES. Maximal size of possible extension queue 1735. Compared 221298 event pairs, 900 based on Foata normal form. 1367/28395 useless extension candidates. Maximal degree in co-relation 43509. Up to 11086 conditions per place. [2024-11-07 19:33:17,309 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 195 selfloop transitions, 50 changer transitions 33/302 dead transitions. [2024-11-07 19:33:17,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 302 transitions, 1890 flow [2024-11-07 19:33:17,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-07 19:33:17,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-07 19:33:17,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 794 transitions. [2024-11-07 19:33:17,311 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5728715728715729 [2024-11-07 19:33:17,311 INFO L175 Difference]: Start difference. First operand has 78 places, 67 transitions, 319 flow. Second operand 21 states and 794 transitions. [2024-11-07 19:33:17,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 302 transitions, 1890 flow [2024-11-07 19:33:17,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 302 transitions, 1867 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-11-07 19:33:17,339 INFO L231 Difference]: Finished difference. Result has 105 places, 116 transitions, 891 flow [2024-11-07 19:33:17,339 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=891, PETRI_PLACES=105, PETRI_TRANSITIONS=116} [2024-11-07 19:33:17,339 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 37 predicate places. [2024-11-07 19:33:17,339 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 116 transitions, 891 flow [2024-11-07 19:33:17,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 29.72222222222222) internal successors, (535), 18 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:17,339 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:17,339 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:17,352 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 19:33:17,543 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,SelfDestructingSolverStorable14 [2024-11-07 19:33:17,543 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:17,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:17,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1788972680, now seen corresponding path program 1 times [2024-11-07 19:33:17,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:17,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668190125] [2024-11-07 19:33:17,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:17,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:18,351 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:18,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:18,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668190125] [2024-11-07 19:33:18,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668190125] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:33:18,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498925145] [2024-11-07 19:33:18,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:18,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:18,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:33:18,353 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:33:18,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-07 19:33:18,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:18,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-07 19:33:18,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:33:18,555 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 5 treesize of output 3 [2024-11-07 19:33:18,558 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 10 treesize of output 8 [2024-11-07 19:33:18,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 7 [2024-11-07 19:33:18,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:33:18,595 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:33:18,635 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:33:18,635 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 18 [2024-11-07 19:33:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-07 19:33:18,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498925145] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:33:18,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:33:18,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 5] total 16 [2024-11-07 19:33:18,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091911295] [2024-11-07 19:33:18,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:33:18,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-07 19:33:18,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:18,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-07 19:33:18,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-07 19:33:18,897 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-07 19:33:18,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 116 transitions, 891 flow. Second operand has 17 states, 17 states have (on average 28.0) internal successors, (476), 17 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:18,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:18,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-07 19:33:18,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:21,680 INFO L124 PetriNetUnfolderBase]: 21499/33582 cut-off events. [2024-11-07 19:33:21,681 INFO L125 PetriNetUnfolderBase]: For 102222/105166 co-relation queries the response was YES. [2024-11-07 19:33:21,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110975 conditions, 33582 events. 21499/33582 cut-off events. For 102222/105166 co-relation queries the response was YES. Maximal size of possible extension queue 1972. Compared 270288 event pairs, 1183 based on Foata normal form. 1920/34948 useless extension candidates. Maximal degree in co-relation 86833. Up to 12164 conditions per place. [2024-11-07 19:33:22,115 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 150 selfloop transitions, 60 changer transitions 1/235 dead transitions. [2024-11-07 19:33:22,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 235 transitions, 1918 flow [2024-11-07 19:33:22,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-07 19:33:22,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-07 19:33:22,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 504 transitions. [2024-11-07 19:33:22,117 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.509090909090909 [2024-11-07 19:33:22,117 INFO L175 Difference]: Start difference. First operand has 105 places, 116 transitions, 891 flow. Second operand 15 states and 504 transitions. [2024-11-07 19:33:22,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 235 transitions, 1918 flow [2024-11-07 19:33:22,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 235 transitions, 1832 flow, removed 42 selfloop flow, removed 1 redundant places. [2024-11-07 19:33:22,892 INFO L231 Difference]: Finished difference. Result has 120 places, 140 transitions, 1258 flow [2024-11-07 19:33:22,892 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1258, PETRI_PLACES=120, PETRI_TRANSITIONS=140} [2024-11-07 19:33:22,892 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 52 predicate places. [2024-11-07 19:33:22,892 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 140 transitions, 1258 flow [2024-11-07 19:33:22,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 28.0) internal successors, (476), 17 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:22,893 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:22,893 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:22,905 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 19:33:23,093 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,SelfDestructingSolverStorable15 [2024-11-07 19:33:23,093 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:23,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:23,094 INFO L85 PathProgramCache]: Analyzing trace with hash -899420501, now seen corresponding path program 2 times [2024-11-07 19:33:23,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:23,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763060196] [2024-11-07 19:33:23,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:23,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:23,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:33:23,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:23,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763060196] [2024-11-07 19:33:23,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763060196] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:33:23,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494707501] [2024-11-07 19:33:23,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:33:23,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:23,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:33:23,175 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:33:23,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-07 19:33:23,265 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:33:23,265 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:33:23,266 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-07 19:33:23,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:33:23,301 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:33:23,302 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:33:23,398 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:33:23,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494707501] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:33:23,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:33:23,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 8 [2024-11-07 19:33:23,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199341416] [2024-11-07 19:33:23,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:33:23,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-07 19:33:23,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:23,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-07 19:33:23,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-11-07 19:33:23,412 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-07 19:33:23,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 140 transitions, 1258 flow. Second operand has 8 states, 8 states have (on average 33.0) internal successors, (264), 8 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:23,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:23,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-07 19:33:23,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:27,768 INFO L124 PetriNetUnfolderBase]: 30164/47767 cut-off events. [2024-11-07 19:33:27,768 INFO L125 PetriNetUnfolderBase]: For 170402/173895 co-relation queries the response was YES. [2024-11-07 19:33:28,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157835 conditions, 47767 events. 30164/47767 cut-off events. For 170402/173895 co-relation queries the response was YES. Maximal size of possible extension queue 2372. Compared 405746 event pairs, 3743 based on Foata normal form. 2615/49074 useless extension candidates. Maximal degree in co-relation 134179. Up to 20823 conditions per place. [2024-11-07 19:33:28,224 INFO L140 encePairwiseOnDemand]: 63/66 looper letters, 123 selfloop transitions, 45 changer transitions 0/192 dead transitions. [2024-11-07 19:33:28,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 192 transitions, 1854 flow [2024-11-07 19:33:28,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:33:28,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:33:28,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 178 transitions. [2024-11-07 19:33:28,225 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6742424242424242 [2024-11-07 19:33:28,225 INFO L175 Difference]: Start difference. First operand has 120 places, 140 transitions, 1258 flow. Second operand 4 states and 178 transitions. [2024-11-07 19:33:28,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 192 transitions, 1854 flow [2024-11-07 19:33:29,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 192 transitions, 1773 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-11-07 19:33:29,050 INFO L231 Difference]: Finished difference. Result has 118 places, 145 transitions, 1426 flow [2024-11-07 19:33:29,051 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1111, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1426, PETRI_PLACES=118, PETRI_TRANSITIONS=145} [2024-11-07 19:33:29,051 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 50 predicate places. [2024-11-07 19:33:29,051 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 145 transitions, 1426 flow [2024-11-07 19:33:29,051 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 33.0) internal successors, (264), 8 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:29,051 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:29,051 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:29,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-07 19:33:29,251 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:29,252 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:29,252 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:29,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1948024051, now seen corresponding path program 1 times [2024-11-07 19:33:29,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:29,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922105855] [2024-11-07 19:33:29,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:29,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:29,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:29,298 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-07 19:33:29,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:29,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922105855] [2024-11-07 19:33:29,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922105855] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:29,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:29,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:33:29,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946903110] [2024-11-07 19:33:29,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:29,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:33:29,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:29,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:33:29,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:33:29,302 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-07 19:33:29,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 145 transitions, 1426 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:29,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:29,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-07 19:33:29,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:35,063 INFO L124 PetriNetUnfolderBase]: 33194/54445 cut-off events. [2024-11-07 19:33:35,063 INFO L125 PetriNetUnfolderBase]: For 257164/262666 co-relation queries the response was YES. [2024-11-07 19:33:35,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186171 conditions, 54445 events. 33194/54445 cut-off events. For 257164/262666 co-relation queries the response was YES. Maximal size of possible extension queue 2620. Compared 492682 event pairs, 11096 based on Foata normal form. 4000/56973 useless extension candidates. Maximal degree in co-relation 149820. Up to 26040 conditions per place. [2024-11-07 19:33:35,509 INFO L140 encePairwiseOnDemand]: 63/66 looper letters, 168 selfloop transitions, 8 changer transitions 0/200 dead transitions. [2024-11-07 19:33:35,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 200 transitions, 2368 flow [2024-11-07 19:33:35,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:33:35,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:33:35,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2024-11-07 19:33:35,510 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6414141414141414 [2024-11-07 19:33:35,511 INFO L175 Difference]: Start difference. First operand has 118 places, 145 transitions, 1426 flow. Second operand 3 states and 127 transitions. [2024-11-07 19:33:35,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 200 transitions, 2368 flow [2024-11-07 19:33:36,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 200 transitions, 2343 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-07 19:33:36,430 INFO L231 Difference]: Finished difference. Result has 120 places, 146 transitions, 1463 flow [2024-11-07 19:33:36,430 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1463, PETRI_PLACES=120, PETRI_TRANSITIONS=146} [2024-11-07 19:33:36,431 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 52 predicate places. [2024-11-07 19:33:36,431 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 146 transitions, 1463 flow [2024-11-07 19:33:36,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:36,431 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:36,431 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:36,431 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-07 19:33:36,431 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:36,431 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:36,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1602456348, now seen corresponding path program 3 times [2024-11-07 19:33:36,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:36,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450250082] [2024-11-07 19:33:36,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:36,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:37,487 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:37,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:37,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450250082] [2024-11-07 19:33:37,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450250082] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:33:37,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860249419] [2024-11-07 19:33:37,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-07 19:33:37,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:37,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:33:37,489 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:33:37,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-07 19:33:37,578 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-07 19:33:37,578 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:33:37,583 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-07 19:33:37,590 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:33:37,954 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 5 treesize of output 3 [2024-11-07 19:33:37,957 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 10 treesize of output 8 [2024-11-07 19:33:38,122 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:33:38,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 12 [2024-11-07 19:33:38,127 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:33:38,127 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:33:38,472 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:33:38,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 51 [2024-11-07 19:33:38,549 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:33:38,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860249419] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:33:38,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:33:38,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 22 [2024-11-07 19:33:38,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617127562] [2024-11-07 19:33:38,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:33:38,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-07 19:33:38,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:38,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-07 19:33:38,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2024-11-07 19:33:38,785 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-07 19:33:38,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 146 transitions, 1463 flow. Second operand has 23 states, 23 states have (on average 29.565217391304348) internal successors, (680), 23 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:38,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:38,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-07 19:33:38,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand