./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-min-array-hom.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-more-min-array-hom.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', '0224e82797c7b26c7800eaf85be5e5678e7961d21aa4e2312eda2860d261b33a'] 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-more-min-array-hom.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 0224e82797c7b26c7800eaf85be5e5678e7961d21aa4e2312eda2860d261b33a --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-07 19:36:08,851 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-07 19:36:08,931 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-07 19:36:08,937 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-07 19:36:08,938 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-07 19:36:08,958 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-07 19:36:08,959 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-07 19:36:08,959 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-07 19:36:08,960 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-07 19:36:08,960 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-07 19:36:08,960 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-07 19:36:08,961 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-07 19:36:08,961 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-07 19:36:08,961 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-07 19:36:08,961 INFO L153 SettingsManager]: * Use SBE=true [2024-11-07 19:36:08,961 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-07 19:36:08,962 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-07 19:36:08,962 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-07 19:36:08,962 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-07 19:36:08,962 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-07 19:36:08,962 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-07 19:36:08,962 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-07 19:36:08,962 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-07 19:36:08,962 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-07 19:36:08,962 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-07 19:36:08,962 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-07 19:36:08,963 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-07 19:36:08,963 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-07 19:36:08,963 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-07 19:36:08,963 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-07 19:36:08,963 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-07 19:36:08,963 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-07 19:36:08,963 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-07 19:36:08,964 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:36:08,964 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-07 19:36:08,964 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-07 19:36:08,964 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-07 19:36:08,964 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-07 19:36:08,964 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-07 19:36:08,964 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-07 19:36:08,964 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-07 19:36:08,964 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-07 19:36:08,964 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 -> 0224e82797c7b26c7800eaf85be5e5678e7961d21aa4e2312eda2860d261b33a [2024-11-07 19:36:09,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-07 19:36:09,230 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-07 19:36:09,232 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-07 19:36:09,233 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-07 19:36:09,233 INFO L274 PluginConnector]: CDTParser initialized [2024-11-07 19:36:09,235 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2024-11-07 19:36:10,365 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-07 19:36:10,616 INFO L384 CDTParser]: Found 1 translation units. [2024-11-07 19:36:10,617 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-min-array-hom.wvr.c [2024-11-07 19:36:10,625 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/e45cc2106/fd688a6aa6f04b6ea481b0f19a4589a9/FLAG8a42bfc86 [2024-11-07 19:36:10,949 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/e45cc2106/fd688a6aa6f04b6ea481b0f19a4589a9 [2024-11-07 19:36:10,952 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-07 19:36:10,953 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-07 19:36:10,955 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-07 19:36:10,955 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-07 19:36:10,959 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-07 19:36:10,960 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:36:10" (1/1) ... [2024-11-07 19:36:10,962 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@357186ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:10, skipping insertion in model container [2024-11-07 19:36:10,963 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:36:10" (1/1) ... [2024-11-07 19:36:10,978 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-07 19:36:11,090 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 19:36:11,092 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:36:11,098 INFO L200 MainTranslator]: Completed pre-run [2024-11-07 19:36:11,114 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:36:11,125 INFO L204 MainTranslator]: Completed translation [2024-11-07 19:36:11,125 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:11 WrapperNode [2024-11-07 19:36:11,125 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-07 19:36:11,126 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-07 19:36:11,127 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-07 19:36:11,127 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-07 19:36:11,132 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:11" (1/1) ... [2024-11-07 19:36:11,139 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:11" (1/1) ... [2024-11-07 19:36:11,157 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 89 [2024-11-07 19:36:11,158 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-07 19:36:11,159 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-07 19:36:11,159 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-07 19:36:11,159 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-07 19:36:11,165 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:11" (1/1) ... [2024-11-07 19:36:11,166 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:11" (1/1) ... [2024-11-07 19:36:11,169 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:11" (1/1) ... [2024-11-07 19:36:11,183 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-07 19:36:11,183 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:11" (1/1) ... [2024-11-07 19:36:11,183 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:11" (1/1) ... [2024-11-07 19:36:11,188 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:11" (1/1) ... [2024-11-07 19:36:11,192 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:11" (1/1) ... [2024-11-07 19:36:11,193 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:11" (1/1) ... [2024-11-07 19:36:11,198 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:11" (1/1) ... [2024-11-07 19:36:11,199 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-07 19:36:11,200 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-07 19:36:11,200 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-07 19:36:11,200 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-07 19:36:11,201 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:11" (1/1) ... [2024-11-07 19:36:11,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:36:11,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:11,237 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 19:36:11,242 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 19:36:11,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-07 19:36:11,259 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-07 19:36:11,259 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-07 19:36:11,259 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-07 19:36:11,260 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-07 19:36:11,260 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-07 19:36:11,260 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-07 19:36:11,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-07 19:36:11,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-07 19:36:11,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-07 19:36:11,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-07 19:36:11,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-07 19:36:11,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-07 19:36:11,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-07 19:36:11,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-07 19:36:11,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-07 19:36:11,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-07 19:36:11,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-07 19:36:11,262 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 19:36:11,359 INFO L238 CfgBuilder]: Building ICFG [2024-11-07 19:36:11,361 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-07 19:36:11,598 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-07 19:36:11,598 INFO L287 CfgBuilder]: Performing block encoding [2024-11-07 19:36:11,788 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-07 19:36:11,789 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-07 19:36:11,790 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:36:11 BoogieIcfgContainer [2024-11-07 19:36:11,790 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-07 19:36:11,791 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-07 19:36:11,792 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-07 19:36:11,795 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-07 19:36:11,796 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:36:10" (1/3) ... [2024-11-07 19:36:11,796 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25854ea7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:36:11, skipping insertion in model container [2024-11-07 19:36:11,797 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:36:11" (2/3) ... [2024-11-07 19:36:11,797 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25854ea7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:36:11, skipping insertion in model container [2024-11-07 19:36:11,797 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:36:11" (3/3) ... [2024-11-07 19:36:11,798 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array-hom.wvr.c [2024-11-07 19:36:11,809 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-07 19:36:11,809 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-11-07 19:36:11,809 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-07 19:36:11,859 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-07 19:36:11,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 50 transitions, 121 flow [2024-11-07 19:36:11,919 INFO L124 PetriNetUnfolderBase]: 4/47 cut-off events. [2024-11-07 19:36:11,920 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-07 19:36:11,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 4/47 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 103 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2024-11-07 19:36:11,923 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 50 transitions, 121 flow [2024-11-07 19:36:11,925 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 46 transitions, 110 flow [2024-11-07 19:36:11,937 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 19:36:11,947 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;@18316347, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 19:36:11,947 INFO L334 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2024-11-07 19:36:11,950 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 19:36:11,950 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-07 19:36:11,950 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 19:36:11,950 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:11,952 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:36:11,952 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:11,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:11,956 INFO L85 PathProgramCache]: Analyzing trace with hash 494854, now seen corresponding path program 1 times [2024-11-07 19:36:11,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:11,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225203899] [2024-11-07 19:36:11,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:11,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:12,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:12,173 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 19:36:12,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:12,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225203899] [2024-11-07 19:36:12,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225203899] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:36:12,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:36:12,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-07 19:36:12,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212720035] [2024-11-07 19:36:12,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:36:12,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:36:12,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:12,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:36:12,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:36:12,212 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-07 19:36:12,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:12,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:12,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-07 19:36:12,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:12,521 INFO L124 PetriNetUnfolderBase]: 1316/1930 cut-off events. [2024-11-07 19:36:12,521 INFO L125 PetriNetUnfolderBase]: For 86/86 co-relation queries the response was YES. [2024-11-07 19:36:12,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3943 conditions, 1930 events. 1316/1930 cut-off events. For 86/86 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9858 event pairs, 1060 based on Foata normal form. 1/1377 useless extension candidates. Maximal degree in co-relation 3637. Up to 1877 conditions per place. [2024-11-07 19:36:12,539 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 30 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-11-07 19:36:12,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 156 flow [2024-11-07 19:36:12,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:36:12,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:36:12,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-11-07 19:36:12,551 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44666666666666666 [2024-11-07 19:36:12,553 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 110 flow. Second operand 3 states and 67 transitions. [2024-11-07 19:36:12,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 156 flow [2024-11-07 19:36:12,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 37 transitions, 144 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-07 19:36:12,559 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 84 flow [2024-11-07 19:36:12,561 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2024-11-07 19:36:12,565 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -13 predicate places. [2024-11-07 19:36:12,565 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 84 flow [2024-11-07 19:36:12,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:12,565 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:12,565 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:36:12,566 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-07 19:36:12,566 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:12,567 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:12,567 INFO L85 PathProgramCache]: Analyzing trace with hash 494855, now seen corresponding path program 1 times [2024-11-07 19:36:12,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:12,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671885980] [2024-11-07 19:36:12,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:12,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:12,821 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 19:36:12,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:12,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671885980] [2024-11-07 19:36:12,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671885980] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:36:12,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:36:12,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:36:12,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876753105] [2024-11-07 19:36:12,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:36:12,823 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:36:12,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:12,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:36:12,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:36:12,828 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-07 19:36:12,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:12,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:12,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-07 19:36:12,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:13,052 INFO L124 PetriNetUnfolderBase]: 1317/1933 cut-off events. [2024-11-07 19:36:13,052 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-07 19:36:13,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3865 conditions, 1933 events. 1317/1933 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9817 event pairs, 1060 based on Foata normal form. 0/1379 useless extension candidates. Maximal degree in co-relation 3843. Up to 1882 conditions per place. [2024-11-07 19:36:13,061 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 32 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2024-11-07 19:36:13,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 164 flow [2024-11-07 19:36:13,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:36:13,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:36:13,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-11-07 19:36:13,062 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.365 [2024-11-07 19:36:13,062 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 84 flow. Second operand 4 states and 73 transitions. [2024-11-07 19:36:13,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 164 flow [2024-11-07 19:36:13,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:36:13,064 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 107 flow [2024-11-07 19:36:13,064 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2024-11-07 19:36:13,064 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -10 predicate places. [2024-11-07 19:36:13,064 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 107 flow [2024-11-07 19:36:13,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:13,065 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:13,065 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-07 19:36:13,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-07 19:36:13,065 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:13,065 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:13,065 INFO L85 PathProgramCache]: Analyzing trace with hash 475570971, now seen corresponding path program 1 times [2024-11-07 19:36:13,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:13,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223024511] [2024-11-07 19:36:13,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:13,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:13,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:13,323 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 19:36:13,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:13,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223024511] [2024-11-07 19:36:13,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223024511] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:13,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819161502] [2024-11-07 19:36:13,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:13,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:13,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:13,326 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 19:36:13,327 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 19:36:13,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:13,383 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-07 19:36:13,385 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:13,438 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 19:36:13,622 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 19:36:13,622 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:36:13,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819161502] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:36:13,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:36:13,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-07 19:36:13,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143717861] [2024-11-07 19:36:13,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:36:13,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-07 19:36:13,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:13,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-07 19:36:13,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-07 19:36:13,754 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-07 19:36:13,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 107 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:13,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:13,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-07 19:36:13,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:14,100 INFO L124 PetriNetUnfolderBase]: 1317/1932 cut-off events. [2024-11-07 19:36:14,101 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-07 19:36:14,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3872 conditions, 1932 events. 1317/1932 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9863 event pairs, 1060 based on Foata normal form. 0/1378 useless extension candidates. Maximal degree in co-relation 3850. Up to 1878 conditions per place. [2024-11-07 19:36:14,112 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 28 selfloop transitions, 7 changer transitions 0/39 dead transitions. [2024-11-07 19:36:14,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 173 flow [2024-11-07 19:36:14,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:36:14,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:36:14,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 90 transitions. [2024-11-07 19:36:14,113 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3 [2024-11-07 19:36:14,113 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 107 flow. Second operand 6 states and 90 transitions. [2024-11-07 19:36:14,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 173 flow [2024-11-07 19:36:14,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 39 transitions, 170 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:36:14,114 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 114 flow [2024-11-07 19:36:14,114 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=114, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2024-11-07 19:36:14,115 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2024-11-07 19:36:14,115 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 114 flow [2024-11-07 19:36:14,115 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:14,115 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:14,115 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-07 19:36:14,130 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 19:36:14,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:14,316 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:14,316 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:14,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1859881490, now seen corresponding path program 1 times [2024-11-07 19:36:14,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:14,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699531188] [2024-11-07 19:36:14,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:14,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:14,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:14,380 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 19:36:14,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:14,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699531188] [2024-11-07 19:36:14,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699531188] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:36:14,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:36:14,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:36:14,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844218288] [2024-11-07 19:36:14,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:36:14,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:36:14,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:14,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:36:14,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:36:14,390 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-07 19:36:14,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:14,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:14,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-07 19:36:14,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:14,531 INFO L124 PetriNetUnfolderBase]: 1316/1931 cut-off events. [2024-11-07 19:36:14,531 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-07 19:36:14,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3873 conditions, 1931 events. 1316/1931 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 9800 event pairs, 1060 based on Foata normal form. 1/1378 useless extension candidates. Maximal degree in co-relation 3851. Up to 1880 conditions per place. [2024-11-07 19:36:14,546 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 32 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2024-11-07 19:36:14,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 38 transitions, 176 flow [2024-11-07 19:36:14,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:36:14,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:36:14,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2024-11-07 19:36:14,549 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-11-07 19:36:14,549 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 114 flow. Second operand 3 states and 65 transitions. [2024-11-07 19:36:14,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 38 transitions, 176 flow [2024-11-07 19:36:14,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 38 transitions, 150 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-07 19:36:14,551 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 86 flow [2024-11-07 19:36:14,552 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2024-11-07 19:36:14,552 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -12 predicate places. [2024-11-07 19:36:14,553 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 86 flow [2024-11-07 19:36:14,553 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:14,553 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:14,553 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:14,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-07 19:36:14,553 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:14,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:14,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1359754370, now seen corresponding path program 1 times [2024-11-07 19:36:14,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:14,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097949241] [2024-11-07 19:36:14,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:14,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:14,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:14,736 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 19:36:14,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:14,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097949241] [2024-11-07 19:36:14,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097949241] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:14,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037272293] [2024-11-07 19:36:14,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:14,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:14,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:14,740 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 19:36:14,742 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 19:36:14,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:14,810 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-07 19:36:14,812 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:14,820 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 19:36:14,859 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 19:36:14,859 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:14,917 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 19:36:14,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037272293] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:14,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-07 19:36:14,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-11-07 19:36:14,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700208477] [2024-11-07 19:36:14,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:36:14,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-07 19:36:14,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:14,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-07 19:36:14,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-07 19:36:14,936 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-07 19:36:14,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 86 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:14,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:14,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-07 19:36:14,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:15,192 INFO L124 PetriNetUnfolderBase]: 1814/2679 cut-off events. [2024-11-07 19:36:15,193 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-07 19:36:15,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5292 conditions, 2679 events. 1814/2679 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 14525 event pairs, 880 based on Foata normal form. 0/1942 useless extension candidates. Maximal degree in co-relation 5281. Up to 1584 conditions per place. [2024-11-07 19:36:15,206 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 47 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-11-07 19:36:15,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 236 flow [2024-11-07 19:36:15,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:36:15,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:36:15,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-11-07 19:36:15,207 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-11-07 19:36:15,207 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 86 flow. Second operand 6 states and 115 transitions. [2024-11-07 19:36:15,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 236 flow [2024-11-07 19:36:15,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 58 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:36:15,208 INFO L231 Difference]: Finished difference. Result has 45 places, 40 transitions, 115 flow [2024-11-07 19:36:15,209 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=115, PETRI_PLACES=45, PETRI_TRANSITIONS=40} [2024-11-07 19:36:15,209 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -7 predicate places. [2024-11-07 19:36:15,209 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 40 transitions, 115 flow [2024-11-07 19:36:15,209 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:15,209 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:15,209 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:15,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-07 19:36:15,410 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 19:36:15,410 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:15,411 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:15,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1359754371, now seen corresponding path program 1 times [2024-11-07 19:36:15,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:15,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814122761] [2024-11-07 19:36:15,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:15,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:15,447 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 19:36:15,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:15,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814122761] [2024-11-07 19:36:15,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814122761] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:36:15,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:36:15,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:36:15,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346661334] [2024-11-07 19:36:15,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:36:15,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:36:15,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:15,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:36:15,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:36:15,458 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-07 19:36:15,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 40 transitions, 115 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:15,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:15,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-07 19:36:15,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:15,598 INFO L124 PetriNetUnfolderBase]: 1001/1468 cut-off events. [2024-11-07 19:36:15,599 INFO L125 PetriNetUnfolderBase]: For 904/904 co-relation queries the response was YES. [2024-11-07 19:36:15,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3605 conditions, 1468 events. 1001/1468 cut-off events. For 904/904 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 6568 event pairs, 733 based on Foata normal form. 123/1413 useless extension candidates. Maximal degree in co-relation 794. Up to 1405 conditions per place. [2024-11-07 19:36:15,606 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 31 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-11-07 19:36:15,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 175 flow [2024-11-07 19:36:15,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:36:15,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:36:15,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-11-07 19:36:15,608 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34 [2024-11-07 19:36:15,608 INFO L175 Difference]: Start difference. First operand has 45 places, 40 transitions, 115 flow. Second operand 4 states and 68 transitions. [2024-11-07 19:36:15,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 175 flow [2024-11-07 19:36:15,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 37 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:36:15,609 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 108 flow [2024-11-07 19:36:15,609 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2024-11-07 19:36:15,610 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -10 predicate places. [2024-11-07 19:36:15,610 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 108 flow [2024-11-07 19:36:15,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:15,610 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:15,610 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:15,610 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-07 19:36:15,610 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:15,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:15,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1083423898, now seen corresponding path program 1 times [2024-11-07 19:36:15,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:15,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575240069] [2024-11-07 19:36:15,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:15,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:15,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:15,698 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 19:36:15,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:15,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575240069] [2024-11-07 19:36:15,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575240069] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:15,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467150026] [2024-11-07 19:36:15,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:15,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:15,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:15,702 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 19:36:15,703 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 19:36:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:15,759 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-07 19:36:15,760 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:15,811 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 19:36:15,811 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:15,860 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 19:36:15,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467150026] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:36:15,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:36:15,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-07 19:36:15,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950490983] [2024-11-07 19:36:15,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:36:15,861 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-07 19:36:15,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:15,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-07 19:36:15,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-07 19:36:15,908 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-07 19:36:15,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 108 flow. Second operand has 13 states, 13 states have (on average 10.923076923076923) internal successors, (142), 13 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:15,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:15,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-07 19:36:15,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:16,196 INFO L124 PetriNetUnfolderBase]: 1728/2523 cut-off events. [2024-11-07 19:36:16,196 INFO L125 PetriNetUnfolderBase]: For 1661/1661 co-relation queries the response was YES. [2024-11-07 19:36:16,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6300 conditions, 2523 events. 1728/2523 cut-off events. For 1661/1661 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 11932 event pairs, 1148 based on Foata normal form. 0/2237 useless extension candidates. Maximal degree in co-relation 4244. Up to 1681 conditions per place. [2024-11-07 19:36:16,211 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 69 selfloop transitions, 8 changer transitions 0/80 dead transitions. [2024-11-07 19:36:16,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 80 transitions, 404 flow [2024-11-07 19:36:16,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-07 19:36:16,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-07 19:36:16,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-11-07 19:36:16,214 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2024-11-07 19:36:16,214 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 108 flow. Second operand 7 states and 135 transitions. [2024-11-07 19:36:16,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 80 transitions, 404 flow [2024-11-07 19:36:16,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 80 transitions, 400 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:36:16,219 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 156 flow [2024-11-07 19:36:16,219 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=156, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2024-11-07 19:36:16,219 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -2 predicate places. [2024-11-07 19:36:16,221 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 156 flow [2024-11-07 19:36:16,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.923076923076923) internal successors, (142), 13 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:16,221 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:16,221 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:16,237 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 19:36:16,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:16,422 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:16,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:16,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1689668966, now seen corresponding path program 1 times [2024-11-07 19:36:16,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:16,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773721012] [2024-11-07 19:36:16,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:16,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:16,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:16,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:36:16,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:16,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773721012] [2024-11-07 19:36:16,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773721012] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:16,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796061114] [2024-11-07 19:36:16,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:16,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:16,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:16,521 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 19:36:16,523 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 19:36:16,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:16,583 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-07 19:36:16,583 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:36:16,663 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:36:16,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796061114] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:36:16,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:36:16,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-07 19:36:16,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765473313] [2024-11-07 19:36:16,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:36:16,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-07 19:36:16,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:16,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-07 19:36:16,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-07 19:36:16,755 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-07 19:36:16,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 156 flow. Second operand has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:16,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:16,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-07 19:36:16,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:17,141 INFO L124 PetriNetUnfolderBase]: 1788/2621 cut-off events. [2024-11-07 19:36:17,142 INFO L125 PetriNetUnfolderBase]: For 1585/1677 co-relation queries the response was YES. [2024-11-07 19:36:17,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6793 conditions, 2621 events. 1788/2621 cut-off events. For 1585/1677 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 12682 event pairs, 1114 based on Foata normal form. 38/2421 useless extension candidates. Maximal degree in co-relation 4626. Up to 1826 conditions per place. [2024-11-07 19:36:17,153 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 74 selfloop transitions, 10 changer transitions 0/87 dead transitions. [2024-11-07 19:36:17,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 87 transitions, 456 flow [2024-11-07 19:36:17,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-07 19:36:17,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-07 19:36:17,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-11-07 19:36:17,154 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-11-07 19:36:17,154 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 156 flow. Second operand 8 states and 155 transitions. [2024-11-07 19:36:17,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 87 transitions, 456 flow [2024-11-07 19:36:17,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 87 transitions, 454 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:36:17,157 INFO L231 Difference]: Finished difference. Result has 59 places, 46 transitions, 215 flow [2024-11-07 19:36:17,157 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=215, PETRI_PLACES=59, PETRI_TRANSITIONS=46} [2024-11-07 19:36:17,158 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 7 predicate places. [2024-11-07 19:36:17,158 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 46 transitions, 215 flow [2024-11-07 19:36:17,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:17,158 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:17,158 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:17,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-07 19:36:17,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-07 19:36:17,363 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:17,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:17,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1823740779, now seen corresponding path program 1 times [2024-11-07 19:36:17,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:17,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160480668] [2024-11-07 19:36:17,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:17,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:17,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:17,517 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 19:36:17,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:17,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160480668] [2024-11-07 19:36:17,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160480668] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:17,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454422330] [2024-11-07 19:36:17,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:17,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:17,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:17,521 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 19:36:17,523 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 19:36:17,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:17,575 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-07 19:36:17,576 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:17,671 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 19:36:17,671 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-07 19:36:17,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454422330] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:36:17,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-07 19:36:17,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2024-11-07 19:36:17,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931053355] [2024-11-07 19:36:17,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:36:17,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-07 19:36:17,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:17,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-07 19:36:17,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-07 19:36:17,697 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-07 19:36:17,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 46 transitions, 215 flow. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:17,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:17,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-07 19:36:17,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:17,931 INFO L124 PetriNetUnfolderBase]: 2001/3062 cut-off events. [2024-11-07 19:36:17,932 INFO L125 PetriNetUnfolderBase]: For 4359/4426 co-relation queries the response was YES. [2024-11-07 19:36:17,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8678 conditions, 3062 events. 2001/3062 cut-off events. For 4359/4426 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 15779 event pairs, 1077 based on Foata normal form. 0/2835 useless extension candidates. Maximal degree in co-relation 5665. Up to 2134 conditions per place. [2024-11-07 19:36:17,949 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 60 selfloop transitions, 6 changer transitions 0/70 dead transitions. [2024-11-07 19:36:17,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 70 transitions, 469 flow [2024-11-07 19:36:17,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:36:17,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:36:17,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-11-07 19:36:17,951 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.384 [2024-11-07 19:36:17,951 INFO L175 Difference]: Start difference. First operand has 59 places, 46 transitions, 215 flow. Second operand 5 states and 96 transitions. [2024-11-07 19:36:17,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 70 transitions, 469 flow [2024-11-07 19:36:17,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 70 transitions, 454 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-07 19:36:17,957 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 227 flow [2024-11-07 19:36:17,957 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=227, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2024-11-07 19:36:17,959 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 8 predicate places. [2024-11-07 19:36:17,959 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 227 flow [2024-11-07 19:36:17,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:17,959 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:17,959 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:17,976 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 19:36:18,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:18,164 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:18,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:18,164 INFO L85 PathProgramCache]: Analyzing trace with hash -848433454, now seen corresponding path program 2 times [2024-11-07 19:36:18,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:18,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549263298] [2024-11-07 19:36:18,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:18,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:18,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:18,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:36:18,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:18,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549263298] [2024-11-07 19:36:18,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549263298] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:18,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366270785] [2024-11-07 19:36:18,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:36:18,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:18,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:18,293 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 19:36:18,294 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 19:36:18,344 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-07 19:36:18,345 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:36:18,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-07 19:36:18,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:18,360 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 19:36:18,660 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:36:18,660 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-07 19:36:18,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366270785] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:36:18,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-07 19:36:18,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2024-11-07 19:36:18,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459668179] [2024-11-07 19:36:18,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:36:18,661 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-07 19:36:18,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:18,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-07 19:36:18,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-07 19:36:18,696 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-07 19:36:18,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 227 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:18,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:18,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-07 19:36:18,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:19,125 INFO L124 PetriNetUnfolderBase]: 3212/4591 cut-off events. [2024-11-07 19:36:19,125 INFO L125 PetriNetUnfolderBase]: For 7092/7202 co-relation queries the response was YES. [2024-11-07 19:36:19,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14214 conditions, 4591 events. 3212/4591 cut-off events. For 7092/7202 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 21749 event pairs, 1290 based on Foata normal form. 0/4267 useless extension candidates. Maximal degree in co-relation 10987. Up to 2994 conditions per place. [2024-11-07 19:36:19,167 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 80 selfloop transitions, 9 changer transitions 0/92 dead transitions. [2024-11-07 19:36:19,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 92 transitions, 619 flow [2024-11-07 19:36:19,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:36:19,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:36:19,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-11-07 19:36:19,169 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39 [2024-11-07 19:36:19,169 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 227 flow. Second operand 6 states and 117 transitions. [2024-11-07 19:36:19,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 92 transitions, 619 flow [2024-11-07 19:36:19,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 92 transitions, 604 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:36:19,173 INFO L231 Difference]: Finished difference. Result has 64 places, 51 transitions, 261 flow [2024-11-07 19:36:19,173 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=261, PETRI_PLACES=64, PETRI_TRANSITIONS=51} [2024-11-07 19:36:19,173 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 12 predicate places. [2024-11-07 19:36:19,173 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 51 transitions, 261 flow [2024-11-07 19:36:19,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:19,174 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:19,174 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:19,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-07 19:36:19,377 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-07 19:36:19,378 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:19,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:19,378 INFO L85 PathProgramCache]: Analyzing trace with hash 384438138, now seen corresponding path program 2 times [2024-11-07 19:36:19,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:19,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077819097] [2024-11-07 19:36:19,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:19,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:19,542 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:36:19,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:19,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077819097] [2024-11-07 19:36:19,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077819097] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:19,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781144352] [2024-11-07 19:36:19,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:36:19,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:19,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:19,544 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 19:36:19,545 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 19:36:19,596 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:36:19,597 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:36:19,599 INFO L255 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-07 19:36:19,600 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:36:19,685 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:19,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-07 19:36:19,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:36:19,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781144352] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:36:19,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:36:19,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-07 19:36:19,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370099218] [2024-11-07 19:36:19,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:36:19,790 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-07 19:36:19,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:19,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-07 19:36:19,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2024-11-07 19:36:19,891 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-07 19:36:19,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 51 transitions, 261 flow. Second operand has 18 states, 18 states have (on average 11.666666666666666) internal successors, (210), 18 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:19,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:19,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-07 19:36:19,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:20,684 INFO L124 PetriNetUnfolderBase]: 3687/5458 cut-off events. [2024-11-07 19:36:20,684 INFO L125 PetriNetUnfolderBase]: For 8045/8908 co-relation queries the response was YES. [2024-11-07 19:36:20,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17858 conditions, 5458 events. 3687/5458 cut-off events. For 8045/8908 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 28715 event pairs, 1334 based on Foata normal form. 388/5829 useless extension candidates. Maximal degree in co-relation 14440. Up to 2084 conditions per place. [2024-11-07 19:36:20,709 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 125 selfloop transitions, 14 changer transitions 0/144 dead transitions. [2024-11-07 19:36:20,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 144 transitions, 898 flow [2024-11-07 19:36:20,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-07 19:36:20,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-07 19:36:20,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-11-07 19:36:20,713 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.438 [2024-11-07 19:36:20,713 INFO L175 Difference]: Start difference. First operand has 64 places, 51 transitions, 261 flow. Second operand 10 states and 219 transitions. [2024-11-07 19:36:20,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 144 transitions, 898 flow [2024-11-07 19:36:20,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 144 transitions, 866 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-11-07 19:36:20,728 INFO L231 Difference]: Finished difference. Result has 73 places, 56 transitions, 328 flow [2024-11-07 19:36:20,728 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=328, PETRI_PLACES=73, PETRI_TRANSITIONS=56} [2024-11-07 19:36:20,728 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 21 predicate places. [2024-11-07 19:36:20,729 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 56 transitions, 328 flow [2024-11-07 19:36:20,729 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.666666666666666) internal successors, (210), 18 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:20,729 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:20,729 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:20,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-07 19:36:20,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:20,935 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:20,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:20,935 INFO L85 PathProgramCache]: Analyzing trace with hash 202087547, now seen corresponding path program 1 times [2024-11-07 19:36:20,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:20,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327559643] [2024-11-07 19:36:20,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:20,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:21,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:36:21,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:21,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327559643] [2024-11-07 19:36:21,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327559643] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:21,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729802543] [2024-11-07 19:36:21,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:21,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:21,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:21,027 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 19:36:21,028 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 19:36:21,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:21,082 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-07 19:36:21,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:36:21,164 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:36:21,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729802543] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:36:21,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:36:21,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-07 19:36:21,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101541811] [2024-11-07 19:36:21,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:36:21,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-07 19:36:21,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:21,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-07 19:36:21,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2024-11-07 19:36:21,275 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-07 19:36:21,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 56 transitions, 328 flow. Second operand has 18 states, 18 states have (on average 11.166666666666666) internal successors, (201), 18 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:21,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:21,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-07 19:36:21,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:21,992 INFO L124 PetriNetUnfolderBase]: 7046/10034 cut-off events. [2024-11-07 19:36:21,992 INFO L125 PetriNetUnfolderBase]: For 30208/30572 co-relation queries the response was YES. [2024-11-07 19:36:22,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36322 conditions, 10034 events. 7046/10034 cut-off events. For 30208/30572 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 52658 event pairs, 3666 based on Foata normal form. 0/9868 useless extension candidates. Maximal degree in co-relation 19726. Up to 5316 conditions per place. [2024-11-07 19:36:22,097 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 125 selfloop transitions, 14 changer transitions 0/142 dead transitions. [2024-11-07 19:36:22,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 142 transitions, 1135 flow [2024-11-07 19:36:22,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:36:22,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:36:22,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-11-07 19:36:22,099 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38666666666666666 [2024-11-07 19:36:22,099 INFO L175 Difference]: Start difference. First operand has 73 places, 56 transitions, 328 flow. Second operand 9 states and 174 transitions. [2024-11-07 19:36:22,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 142 transitions, 1135 flow [2024-11-07 19:36:22,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 142 transitions, 1036 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-11-07 19:36:22,122 INFO L231 Difference]: Finished difference. Result has 80 places, 63 transitions, 392 flow [2024-11-07 19:36:22,122 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=291, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=392, PETRI_PLACES=80, PETRI_TRANSITIONS=63} [2024-11-07 19:36:22,122 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 28 predicate places. [2024-11-07 19:36:22,123 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 63 transitions, 392 flow [2024-11-07 19:36:22,123 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.166666666666666) internal successors, (201), 18 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:22,123 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:22,123 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:22,136 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-07 19:36:22,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:22,324 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:22,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:22,324 INFO L85 PathProgramCache]: Analyzing trace with hash 275334849, now seen corresponding path program 1 times [2024-11-07 19:36:22,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:22,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226504119] [2024-11-07 19:36:22,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:22,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:22,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:22,398 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:36:22,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:22,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226504119] [2024-11-07 19:36:22,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226504119] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:22,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382109340] [2024-11-07 19:36:22,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:22,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:22,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:22,400 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:36:22,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-07 19:36:22,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:22,461 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-07 19:36:22,462 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:36:22,536 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:22,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:36:22,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382109340] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:36:22,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:36:22,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-07 19:36:22,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744429377] [2024-11-07 19:36:22,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:36:22,584 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-07 19:36:22,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:22,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-07 19:36:22,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2024-11-07 19:36:22,628 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-07 19:36:22,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 63 transitions, 392 flow. Second operand has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:22,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:22,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-07 19:36:22,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:23,320 INFO L124 PetriNetUnfolderBase]: 6959/9784 cut-off events. [2024-11-07 19:36:23,321 INFO L125 PetriNetUnfolderBase]: For 28513/30064 co-relation queries the response was YES. [2024-11-07 19:36:23,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35536 conditions, 9784 events. 6959/9784 cut-off events. For 28513/30064 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 50208 event pairs, 4861 based on Foata normal form. 736/10468 useless extension candidates. Maximal degree in co-relation 25618. Up to 8803 conditions per place. [2024-11-07 19:36:23,368 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 83 selfloop transitions, 12 changer transitions 0/99 dead transitions. [2024-11-07 19:36:23,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 99 transitions, 766 flow [2024-11-07 19:36:23,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-07 19:36:23,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-07 19:36:23,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-11-07 19:36:23,369 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37 [2024-11-07 19:36:23,369 INFO L175 Difference]: Start difference. First operand has 80 places, 63 transitions, 392 flow. Second operand 8 states and 148 transitions. [2024-11-07 19:36:23,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 99 transitions, 766 flow [2024-11-07 19:36:23,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 99 transitions, 757 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-07 19:36:23,388 INFO L231 Difference]: Finished difference. Result has 88 places, 67 transitions, 442 flow [2024-11-07 19:36:23,388 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=442, PETRI_PLACES=88, PETRI_TRANSITIONS=67} [2024-11-07 19:36:23,389 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 36 predicate places. [2024-11-07 19:36:23,389 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 67 transitions, 442 flow [2024-11-07 19:36:23,389 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:23,389 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:23,389 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-07 19:36:23,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-07 19:36:23,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:23,590 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:23,590 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:23,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1880639510, now seen corresponding path program 3 times [2024-11-07 19:36:23,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:23,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409701104] [2024-11-07 19:36:23,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:23,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:23,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:23,673 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:36:23,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:23,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409701104] [2024-11-07 19:36:23,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409701104] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:23,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67193580] [2024-11-07 19:36:23,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-07 19:36:23,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:23,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:23,676 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:36:23,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-07 19:36:23,726 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-07 19:36:23,726 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:36:23,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-07 19:36:23,728 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:23,812 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:36:23,812 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:23,947 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 13 treesize of output 11 [2024-11-07 19:36:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:36:23,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67193580] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:36:23,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:36:23,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 19 [2024-11-07 19:36:23,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880720737] [2024-11-07 19:36:23,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:36:23,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-07 19:36:23,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:23,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-07 19:36:23,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2024-11-07 19:36:24,082 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-07 19:36:24,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 67 transitions, 442 flow. Second operand has 20 states, 20 states have (on average 11.05) internal successors, (221), 20 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:24,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:24,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-07 19:36:24,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:24,995 INFO L124 PetriNetUnfolderBase]: 6227/8755 cut-off events. [2024-11-07 19:36:24,995 INFO L125 PetriNetUnfolderBase]: For 17894/19278 co-relation queries the response was YES. [2024-11-07 19:36:25,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32068 conditions, 8755 events. 6227/8755 cut-off events. For 17894/19278 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 45230 event pairs, 1413 based on Foata normal form. 832/9565 useless extension candidates. Maximal degree in co-relation 23403. Up to 1970 conditions per place. [2024-11-07 19:36:25,038 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 224 selfloop transitions, 27 changer transitions 0/255 dead transitions. [2024-11-07 19:36:25,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 255 transitions, 1900 flow [2024-11-07 19:36:25,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-07 19:36:25,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-07 19:36:25,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 331 transitions. [2024-11-07 19:36:25,040 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41375 [2024-11-07 19:36:25,040 INFO L175 Difference]: Start difference. First operand has 88 places, 67 transitions, 442 flow. Second operand 16 states and 331 transitions. [2024-11-07 19:36:25,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 255 transitions, 1900 flow [2024-11-07 19:36:25,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 255 transitions, 1877 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-07 19:36:25,078 INFO L231 Difference]: Finished difference. Result has 103 places, 75 transitions, 576 flow [2024-11-07 19:36:25,078 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=576, PETRI_PLACES=103, PETRI_TRANSITIONS=75} [2024-11-07 19:36:25,079 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 51 predicate places. [2024-11-07 19:36:25,079 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 75 transitions, 576 flow [2024-11-07 19:36:25,079 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.05) internal successors, (221), 20 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:25,079 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:25,079 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:25,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-07 19:36:25,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-07 19:36:25,280 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:25,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:25,280 INFO L85 PathProgramCache]: Analyzing trace with hash 537255637, now seen corresponding path program 2 times [2024-11-07 19:36:25,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:25,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759427740] [2024-11-07 19:36:25,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:25,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:25,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:25,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:36:25,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:25,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759427740] [2024-11-07 19:36:25,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759427740] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:25,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482450709] [2024-11-07 19:36:25,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:36:25,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:25,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:25,421 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:36:25,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-07 19:36:25,477 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:36:25,477 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:36:25,477 INFO L255 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-07 19:36:25,478 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:25,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:36:25,611 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:25,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2024-11-07 19:36:25,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:36:25,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482450709] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:36:25,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:36:25,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-07 19:36:25,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913503598] [2024-11-07 19:36:25,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:36:25,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-07 19:36:25,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:25,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-07 19:36:25,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2024-11-07 19:36:25,915 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-07 19:36:25,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 75 transitions, 576 flow. Second operand has 20 states, 20 states have (on average 11.4) internal successors, (228), 20 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:25,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:25,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-07 19:36:25,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:26,492 INFO L124 PetriNetUnfolderBase]: 5428/7649 cut-off events. [2024-11-07 19:36:26,492 INFO L125 PetriNetUnfolderBase]: For 33470/34640 co-relation queries the response was YES. [2024-11-07 19:36:26,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32004 conditions, 7649 events. 5428/7649 cut-off events. For 33470/34640 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 38237 event pairs, 1141 based on Foata normal form. 688/8336 useless extension candidates. Maximal degree in co-relation 23736. Up to 2511 conditions per place. [2024-11-07 19:36:26,530 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 163 selfloop transitions, 14 changer transitions 0/183 dead transitions. [2024-11-07 19:36:26,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 183 transitions, 1873 flow [2024-11-07 19:36:26,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-07 19:36:26,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-07 19:36:26,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-11-07 19:36:26,531 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37714285714285717 [2024-11-07 19:36:26,531 INFO L175 Difference]: Start difference. First operand has 103 places, 75 transitions, 576 flow. Second operand 7 states and 132 transitions. [2024-11-07 19:36:26,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 183 transitions, 1873 flow [2024-11-07 19:36:26,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 183 transitions, 1768 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-11-07 19:36:26,608 INFO L231 Difference]: Finished difference. Result has 103 places, 75 transitions, 571 flow [2024-11-07 19:36:26,608 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=571, PETRI_PLACES=103, PETRI_TRANSITIONS=75} [2024-11-07 19:36:26,608 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 51 predicate places. [2024-11-07 19:36:26,608 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 75 transitions, 571 flow [2024-11-07 19:36:26,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.4) internal successors, (228), 20 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:26,609 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:26,609 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:26,621 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-07 19:36:26,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-07 19:36:26,809 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:26,809 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:26,809 INFO L85 PathProgramCache]: Analyzing trace with hash 464008335, now seen corresponding path program 2 times [2024-11-07 19:36:26,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:26,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647623439] [2024-11-07 19:36:26,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:26,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:26,969 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:36:26,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:26,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647623439] [2024-11-07 19:36:26,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647623439] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:26,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687300734] [2024-11-07 19:36:26,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:36:26,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:26,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:26,971 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:36:26,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-07 19:36:27,034 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:36:27,034 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:36:27,035 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-07 19:36:27,036 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:27,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-07 19:36:27,476 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-07 19:36:27,476 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:27,714 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-07 19:36:27,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687300734] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:36:27,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:36:27,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 5] total 18 [2024-11-07 19:36:27,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684080282] [2024-11-07 19:36:27,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:36:27,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-07 19:36:27,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:27,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-07 19:36:27,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2024-11-07 19:36:27,844 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-07 19:36:27,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 75 transitions, 571 flow. Second operand has 20 states, 20 states have (on average 11.15) internal successors, (223), 20 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:27,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:27,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-07 19:36:27,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:29,159 INFO L124 PetriNetUnfolderBase]: 5340/7497 cut-off events. [2024-11-07 19:36:29,159 INFO L125 PetriNetUnfolderBase]: For 32780/32951 co-relation queries the response was YES. [2024-11-07 19:36:29,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32298 conditions, 7497 events. 5340/7497 cut-off events. For 32780/32951 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 36920 event pairs, 996 based on Foata normal form. 118/7361 useless extension candidates. Maximal degree in co-relation 23399. Up to 1459 conditions per place. [2024-11-07 19:36:29,195 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 175 selfloop transitions, 20 changer transitions 0/201 dead transitions. [2024-11-07 19:36:29,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 201 transitions, 1846 flow [2024-11-07 19:36:29,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-07 19:36:29,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-07 19:36:29,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 243 transitions. [2024-11-07 19:36:29,197 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37384615384615383 [2024-11-07 19:36:29,197 INFO L175 Difference]: Start difference. First operand has 103 places, 75 transitions, 571 flow. Second operand 13 states and 243 transitions. [2024-11-07 19:36:29,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 201 transitions, 1846 flow [2024-11-07 19:36:29,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 201 transitions, 1676 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-11-07 19:36:29,233 INFO L231 Difference]: Finished difference. Result has 109 places, 76 transitions, 576 flow [2024-11-07 19:36:29,233 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=519, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=576, PETRI_PLACES=109, PETRI_TRANSITIONS=76} [2024-11-07 19:36:29,234 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 57 predicate places. [2024-11-07 19:36:29,234 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 76 transitions, 576 flow [2024-11-07 19:36:29,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.15) internal successors, (223), 20 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:29,234 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:29,234 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:36:29,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-07 19:36:29,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:29,435 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:29,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:29,435 INFO L85 PathProgramCache]: Analyzing trace with hash 729268385, now seen corresponding path program 1 times [2024-11-07 19:36:29,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:29,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434338633] [2024-11-07 19:36:29,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:29,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:29,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:29,469 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 19:36:29,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:29,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434338633] [2024-11-07 19:36:29,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434338633] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:36:29,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:36:29,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:36:29,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727114682] [2024-11-07 19:36:29,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:36:29,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:36:29,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:29,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:36:29,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:36:29,470 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-07 19:36:29,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 76 transitions, 576 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:29,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:29,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-07 19:36:29,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:29,921 INFO L124 PetriNetUnfolderBase]: 4674/6978 cut-off events. [2024-11-07 19:36:29,921 INFO L125 PetriNetUnfolderBase]: For 25521/26026 co-relation queries the response was YES. [2024-11-07 19:36:29,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28623 conditions, 6978 events. 4674/6978 cut-off events. For 25521/26026 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 36666 event pairs, 1034 based on Foata normal form. 3/6964 useless extension candidates. Maximal degree in co-relation 24081. Up to 5776 conditions per place. [2024-11-07 19:36:29,952 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 89 selfloop transitions, 6 changer transitions 1/105 dead transitions. [2024-11-07 19:36:29,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 105 transitions, 968 flow [2024-11-07 19:36:29,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:36:29,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:36:29,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 74 transitions. [2024-11-07 19:36:29,954 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49333333333333335 [2024-11-07 19:36:29,954 INFO L175 Difference]: Start difference. First operand has 109 places, 76 transitions, 576 flow. Second operand 3 states and 74 transitions. [2024-11-07 19:36:29,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 105 transitions, 968 flow [2024-11-07 19:36:29,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 105 transitions, 892 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-11-07 19:36:29,990 INFO L231 Difference]: Finished difference. Result has 101 places, 81 transitions, 575 flow [2024-11-07 19:36:29,990 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=520, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=575, PETRI_PLACES=101, PETRI_TRANSITIONS=81} [2024-11-07 19:36:29,990 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 49 predicate places. [2024-11-07 19:36:29,990 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 81 transitions, 575 flow [2024-11-07 19:36:29,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:29,991 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:29,991 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] [2024-11-07 19:36:29,991 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-07 19:36:29,991 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:29,991 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:29,991 INFO L85 PathProgramCache]: Analyzing trace with hash 869669701, now seen corresponding path program 1 times [2024-11-07 19:36:29,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:29,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827981938] [2024-11-07 19:36:29,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:29,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:29,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:30,036 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 19:36:30,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:30,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827981938] [2024-11-07 19:36:30,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827981938] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:30,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620164463] [2024-11-07 19:36:30,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:30,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:30,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:30,039 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:36:30,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-07 19:36:30,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:30,097 INFO L255 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-07 19:36:30,098 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:30,120 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 19:36:30,121 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:30,142 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 19:36:30,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620164463] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:30,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-07 19:36:30,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-07 19:36:30,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16501084] [2024-11-07 19:36:30,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:36:30,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:36:30,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:30,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:36:30,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-07 19:36:30,149 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-07 19:36:30,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 81 transitions, 575 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:30,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:30,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-07 19:36:30,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:30,639 INFO L124 PetriNetUnfolderBase]: 5579/8026 cut-off events. [2024-11-07 19:36:30,639 INFO L125 PetriNetUnfolderBase]: For 22142/22669 co-relation queries the response was YES. [2024-11-07 19:36:30,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31316 conditions, 8026 events. 5579/8026 cut-off events. For 22142/22669 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 41208 event pairs, 1577 based on Foata normal form. 246/8241 useless extension candidates. Maximal degree in co-relation 25705. Up to 4421 conditions per place. [2024-11-07 19:36:30,673 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 89 selfloop transitions, 13 changer transitions 0/108 dead transitions. [2024-11-07 19:36:30,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 108 transitions, 922 flow [2024-11-07 19:36:30,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:36:30,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:36:30,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-11-07 19:36:30,674 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.352 [2024-11-07 19:36:30,674 INFO L175 Difference]: Start difference. First operand has 101 places, 81 transitions, 575 flow. Second operand 5 states and 88 transitions. [2024-11-07 19:36:30,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 108 transitions, 922 flow [2024-11-07 19:36:30,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 108 transitions, 904 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-07 19:36:30,704 INFO L231 Difference]: Finished difference. Result has 102 places, 78 transitions, 555 flow [2024-11-07 19:36:30,704 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=555, PETRI_PLACES=102, PETRI_TRANSITIONS=78} [2024-11-07 19:36:30,705 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 50 predicate places. [2024-11-07 19:36:30,705 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 78 transitions, 555 flow [2024-11-07 19:36:30,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:30,705 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:30,705 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] [2024-11-07 19:36:30,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-07 19:36:30,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-07 19:36:30,905 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:30,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:30,906 INFO L85 PathProgramCache]: Analyzing trace with hash -60437449, now seen corresponding path program 1 times [2024-11-07 19:36:30,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:30,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496127507] [2024-11-07 19:36:30,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:30,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:30,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:30,937 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 19:36:30,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:30,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496127507] [2024-11-07 19:36:30,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496127507] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:36:30,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:36:30,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:36:30,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238327551] [2024-11-07 19:36:30,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:36:30,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:36:30,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:30,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:36:30,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:36:30,945 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2024-11-07 19:36:30,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 78 transitions, 555 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:30,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:30,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2024-11-07 19:36:30,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:31,348 INFO L124 PetriNetUnfolderBase]: 5114/7435 cut-off events. [2024-11-07 19:36:31,349 INFO L125 PetriNetUnfolderBase]: For 27945/28551 co-relation queries the response was YES. [2024-11-07 19:36:31,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30268 conditions, 7435 events. 5114/7435 cut-off events. For 27945/28551 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 38773 event pairs, 1522 based on Foata normal form. 264/7502 useless extension candidates. Maximal degree in co-relation 24788. Up to 3944 conditions per place. [2024-11-07 19:36:31,389 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 99 selfloop transitions, 9 changer transitions 0/115 dead transitions. [2024-11-07 19:36:31,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 115 transitions, 1074 flow [2024-11-07 19:36:31,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:36:31,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:36:31,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2024-11-07 19:36:31,390 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38 [2024-11-07 19:36:31,390 INFO L175 Difference]: Start difference. First operand has 102 places, 78 transitions, 555 flow. Second operand 4 states and 76 transitions. [2024-11-07 19:36:31,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 115 transitions, 1074 flow [2024-11-07 19:36:31,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 115 transitions, 1030 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-07 19:36:31,416 INFO L231 Difference]: Finished difference. Result has 101 places, 76 transitions, 535 flow [2024-11-07 19:36:31,416 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=535, PETRI_PLACES=101, PETRI_TRANSITIONS=76} [2024-11-07 19:36:31,416 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 49 predicate places. [2024-11-07 19:36:31,416 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 76 transitions, 535 flow [2024-11-07 19:36:31,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:31,417 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:31,417 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] [2024-11-07 19:36:31,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-07 19:36:31,417 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:31,417 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:31,417 INFO L85 PathProgramCache]: Analyzing trace with hash 935391215, now seen corresponding path program 1 times [2024-11-07 19:36:31,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:31,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142595309] [2024-11-07 19:36:31,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:31,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:31,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:31,821 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 19:36:31,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:31,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142595309] [2024-11-07 19:36:31,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142595309] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:31,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635284273] [2024-11-07 19:36:31,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:31,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:31,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:31,824 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:36:31,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-07 19:36:31,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:31,901 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-07 19:36:31,904 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:31,953 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 15 treesize of output 1 [2024-11-07 19:36:32,463 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 89 treesize of output 65 [2024-11-07 19:36:32,465 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 65 treesize of output 61 [2024-11-07 19:36:32,469 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 61 treesize of output 57 [2024-11-07 19:36:32,564 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 19:36:32,564 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:33,156 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 177 treesize of output 173 [2024-11-07 19:36:33,159 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 173 treesize of output 169 [2024-11-07 19:36:33,961 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 282 treesize of output 254 [2024-11-07 19:36:34,011 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:36:34,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 372 treesize of output 376 [2024-11-07 19:36:47,330 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 247 treesize of output 229 [2024-11-07 19:36:47,371 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:36:47,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 282 treesize of output 312 [2024-11-07 19:36:56,514 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 19:36:56,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635284273] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:36:56,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:36:56,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2024-11-07 19:36:56,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509463672] [2024-11-07 19:36:56,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:36:56,515 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-07 19:36:56,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:36:56,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-07 19:36:56,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2024-11-07 19:36:56,827 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-07 19:36:56,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 76 transitions, 535 flow. Second operand has 24 states, 24 states have (on average 13.0) internal successors, (312), 24 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:56,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:36:56,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-07 19:36:56,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:36:58,329 INFO L124 PetriNetUnfolderBase]: 4127/6284 cut-off events. [2024-11-07 19:36:58,329 INFO L125 PetriNetUnfolderBase]: For 21629/22073 co-relation queries the response was YES. [2024-11-07 19:36:58,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25577 conditions, 6284 events. 4127/6284 cut-off events. For 21629/22073 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 33887 event pairs, 1139 based on Foata normal form. 1/6270 useless extension candidates. Maximal degree in co-relation 21127. Up to 5158 conditions per place. [2024-11-07 19:36:58,373 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 91 selfloop transitions, 19 changer transitions 47/166 dead transitions. [2024-11-07 19:36:58,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 166 transitions, 1388 flow [2024-11-07 19:36:58,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-07 19:36:58,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-07 19:36:58,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 284 transitions. [2024-11-07 19:36:58,376 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.355 [2024-11-07 19:36:58,376 INFO L175 Difference]: Start difference. First operand has 101 places, 76 transitions, 535 flow. Second operand 16 states and 284 transitions. [2024-11-07 19:36:58,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 166 transitions, 1388 flow [2024-11-07 19:36:58,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 166 transitions, 1358 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:36:58,406 INFO L231 Difference]: Finished difference. Result has 121 places, 82 transitions, 621 flow [2024-11-07 19:36:58,406 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=621, PETRI_PLACES=121, PETRI_TRANSITIONS=82} [2024-11-07 19:36:58,406 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 69 predicate places. [2024-11-07 19:36:58,407 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 82 transitions, 621 flow [2024-11-07 19:36:58,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 13.0) internal successors, (312), 24 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:36:58,407 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:36:58,407 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] [2024-11-07 19:36:58,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-07 19:36:58,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:58,607 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:36:58,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:36:58,608 INFO L85 PathProgramCache]: Analyzing trace with hash 601619815, now seen corresponding path program 2 times [2024-11-07 19:36:58,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:36:58,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870745568] [2024-11-07 19:36:58,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:36:58,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:36:58,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:36:58,953 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 19:36:58,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:36:58,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870745568] [2024-11-07 19:36:58,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870745568] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:36:58,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242044133] [2024-11-07 19:36:58,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:36:58,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:36:58,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:36:58,956 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:36:58,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-07 19:36:59,019 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:36:59,019 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:36:59,020 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-07 19:36:59,021 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:36:59,045 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 15 treesize of output 1 [2024-11-07 19:36:59,296 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 79 treesize of output 55 [2024-11-07 19:36:59,297 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2024-11-07 19:36:59,299 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 51 treesize of output 47 [2024-11-07 19:36:59,334 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 19:36:59,334 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:36:59,583 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 177 treesize of output 173 [2024-11-07 19:36:59,585 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 173 treesize of output 169 [2024-11-07 19:37:00,891 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 109 treesize of output 99 [2024-11-07 19:37:00,898 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:37:00,898 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 128 treesize of output 122 [2024-11-07 19:37:01,114 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 204 treesize of output 188 [2024-11-07 19:37:01,141 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:37:01,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 236 treesize of output 240 [2024-11-07 19:37:02,302 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 217 treesize of output 195 [2024-11-07 19:37:02,311 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-11-07 19:37:02,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 296 treesize of output 1 [2024-11-07 19:37:02,372 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 19:37:02,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242044133] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:37:02,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:37:02,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2024-11-07 19:37:02,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981069308] [2024-11-07 19:37:02,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:37:02,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-07 19:37:02,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:37:02,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-07 19:37:02,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2024-11-07 19:37:02,660 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-07 19:37:02,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 82 transitions, 621 flow. Second operand has 23 states, 23 states have (on average 13.043478260869565) internal successors, (300), 23 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:37:02,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:37:02,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-07 19:37:02,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:37:04,359 INFO L124 PetriNetUnfolderBase]: 4172/6398 cut-off events. [2024-11-07 19:37:04,359 INFO L125 PetriNetUnfolderBase]: For 21970/22520 co-relation queries the response was YES. [2024-11-07 19:37:04,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26231 conditions, 6398 events. 4172/6398 cut-off events. For 21970/22520 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 34983 event pairs, 1163 based on Foata normal form. 13/6408 useless extension candidates. Maximal degree in co-relation 26187. Up to 5260 conditions per place. [2024-11-07 19:37:04,393 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 101 selfloop transitions, 27 changer transitions 35/172 dead transitions. [2024-11-07 19:37:04,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 172 transitions, 1628 flow [2024-11-07 19:37:04,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-07 19:37:04,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-07 19:37:04,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 318 transitions. [2024-11-07 19:37:04,394 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33473684210526317 [2024-11-07 19:37:04,395 INFO L175 Difference]: Start difference. First operand has 121 places, 82 transitions, 621 flow. Second operand 19 states and 318 transitions. [2024-11-07 19:37:04,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 172 transitions, 1628 flow [2024-11-07 19:37:04,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 172 transitions, 1560 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-11-07 19:37:04,429 INFO L231 Difference]: Finished difference. Result has 131 places, 92 transitions, 773 flow [2024-11-07 19:37:04,430 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=584, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=773, PETRI_PLACES=131, PETRI_TRANSITIONS=92} [2024-11-07 19:37:04,430 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 79 predicate places. [2024-11-07 19:37:04,430 INFO L471 AbstractCegarLoop]: Abstraction has has 131 places, 92 transitions, 773 flow [2024-11-07 19:37:04,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 13.043478260869565) internal successors, (300), 23 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:37:04,430 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:37:04,430 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] [2024-11-07 19:37:04,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-07 19:37:04,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:37:04,631 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:37:04,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:37:04,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1312950695, now seen corresponding path program 3 times [2024-11-07 19:37:04,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:37:04,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912308298] [2024-11-07 19:37:04,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:37:04,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:37:04,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:37:04,997 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 19:37:04,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:37:04,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912308298] [2024-11-07 19:37:04,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912308298] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:37:04,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383439610] [2024-11-07 19:37:04,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-07 19:37:04,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:37:04,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:37:05,000 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:37:05,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-07 19:37:05,065 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-07 19:37:05,065 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:37:05,066 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-07 19:37:05,068 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:37:05,107 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 15 treesize of output 1 [2024-11-07 19:37:05,354 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 79 treesize of output 55 [2024-11-07 19:37:05,356 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 55 treesize of output 51 [2024-11-07 19:37:05,358 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 51 treesize of output 47 [2024-11-07 19:37:05,406 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 19:37:05,406 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:37:05,590 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 177 treesize of output 173 [2024-11-07 19:37:05,592 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 173 treesize of output 169 [2024-11-07 19:37:06,840 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 109 treesize of output 99 [2024-11-07 19:37:06,847 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:37:06,847 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 128 treesize of output 122 [2024-11-07 19:37:07,031 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 217 treesize of output 195 [2024-11-07 19:37:07,039 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-11-07 19:37:07,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 296 treesize of output 1 [2024-11-07 19:37:07,043 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 204 treesize of output 188 [2024-11-07 19:37:07,076 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:37:07,076 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 236 treesize of output 240 [2024-11-07 19:37:08,040 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 19:37:08,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383439610] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:37:08,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:37:08,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2024-11-07 19:37:08,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157283620] [2024-11-07 19:37:08,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:37:08,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-07 19:37:08,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:37:08,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-07 19:37:08,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2024-11-07 19:37:08,309 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-07 19:37:08,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 92 transitions, 773 flow. Second operand has 24 states, 24 states have (on average 13.0) internal successors, (312), 24 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:37:08,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:37:08,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-07 19:37:08,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:37:10,229 INFO L124 PetriNetUnfolderBase]: 4142/6308 cut-off events. [2024-11-07 19:37:10,229 INFO L125 PetriNetUnfolderBase]: For 23341/23785 co-relation queries the response was YES. [2024-11-07 19:37:10,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26192 conditions, 6308 events. 4142/6308 cut-off events. For 23341/23785 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 34116 event pairs, 1161 based on Foata normal form. 1/6294 useless extension candidates. Maximal degree in co-relation 26141. Up to 5136 conditions per place. [2024-11-07 19:37:10,260 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 116 selfloop transitions, 24 changer transitions 38/187 dead transitions. [2024-11-07 19:37:10,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 187 transitions, 1801 flow [2024-11-07 19:37:10,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-07 19:37:10,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-07 19:37:10,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 338 transitions. [2024-11-07 19:37:10,261 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.338 [2024-11-07 19:37:10,261 INFO L175 Difference]: Start difference. First operand has 131 places, 92 transitions, 773 flow. Second operand 20 states and 338 transitions. [2024-11-07 19:37:10,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 187 transitions, 1801 flow [2024-11-07 19:37:10,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 187 transitions, 1707 flow, removed 26 selfloop flow, removed 11 redundant places. [2024-11-07 19:37:10,290 INFO L231 Difference]: Finished difference. Result has 137 places, 93 transitions, 802 flow [2024-11-07 19:37:10,290 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=707, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=802, PETRI_PLACES=137, PETRI_TRANSITIONS=93} [2024-11-07 19:37:10,290 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 85 predicate places. [2024-11-07 19:37:10,290 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 93 transitions, 802 flow [2024-11-07 19:37:10,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 13.0) internal successors, (312), 24 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:37:10,290 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:37:10,290 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] [2024-11-07 19:37:10,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-07 19:37:10,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:37:10,491 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:37:10,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:37:10,491 INFO L85 PathProgramCache]: Analyzing trace with hash 536571623, now seen corresponding path program 4 times [2024-11-07 19:37:10,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:37:10,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458592419] [2024-11-07 19:37:10,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:37:10,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:37:10,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:37:10,807 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 19:37:10,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:37:10,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458592419] [2024-11-07 19:37:10,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458592419] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:37:10,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241573071] [2024-11-07 19:37:10,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-07 19:37:10,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:37:10,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:37:10,813 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:37:10,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-07 19:37:10,916 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-07 19:37:10,917 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:37:10,918 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-07 19:37:10,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:37:10,964 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 15 treesize of output 1 [2024-11-07 19:37:11,143 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 79 treesize of output 55 [2024-11-07 19:37:11,145 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 55 treesize of output 51 [2024-11-07 19:37:11,146 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 51 treesize of output 47 [2024-11-07 19:37:11,192 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 19:37:11,192 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:37:11,309 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 169 treesize of output 165 [2024-11-07 19:37:11,312 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 165 treesize of output 161 [2024-11-07 19:37:12,574 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 204 treesize of output 188 [2024-11-07 19:37:12,597 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:37:12,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 236 treesize of output 240 [2024-11-07 19:37:16,883 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 217 treesize of output 195 [2024-11-07 19:37:16,915 INFO L349 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2024-11-07 19:37:16,916 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 296 treesize of output 258 [2024-11-07 19:37:17,137 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 109 treesize of output 99 [2024-11-07 19:37:17,148 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:37:17,148 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 128 treesize of output 122 [2024-11-07 19:37:17,499 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 19:37:17,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241573071] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:37:17,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:37:17,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-11-07 19:37:17,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777175489] [2024-11-07 19:37:17,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:37:17,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-07 19:37:17,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:37:17,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-07 19:37:17,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2024-11-07 19:37:17,705 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2024-11-07 19:37:17,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 93 transitions, 802 flow. Second operand has 21 states, 21 states have (on average 12.952380952380953) internal successors, (272), 21 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:37:17,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:37:17,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2024-11-07 19:37:17,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:37:18,942 INFO L124 PetriNetUnfolderBase]: 4002/6077 cut-off events. [2024-11-07 19:37:18,943 INFO L125 PetriNetUnfolderBase]: For 20927/21371 co-relation queries the response was YES. [2024-11-07 19:37:18,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24923 conditions, 6077 events. 4002/6077 cut-off events. For 20927/21371 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 32394 event pairs, 1161 based on Foata normal form. 1/6063 useless extension candidates. Maximal degree in co-relation 24878. Up to 5136 conditions per place. [2024-11-07 19:37:18,969 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 83 selfloop transitions, 15 changer transitions 39/146 dead transitions. [2024-11-07 19:37:18,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 146 transitions, 1388 flow [2024-11-07 19:37:18,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-07 19:37:18,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-07 19:37:18,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 237 transitions. [2024-11-07 19:37:18,970 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3385714285714286 [2024-11-07 19:37:18,970 INFO L175 Difference]: Start difference. First operand has 137 places, 93 transitions, 802 flow. Second operand 14 states and 237 transitions. [2024-11-07 19:37:18,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 146 transitions, 1388 flow [2024-11-07 19:37:18,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 146 transitions, 1307 flow, removed 14 selfloop flow, removed 12 redundant places. [2024-11-07 19:37:18,997 INFO L231 Difference]: Finished difference. Result has 132 places, 84 transitions, 650 flow [2024-11-07 19:37:18,997 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=650, PETRI_PLACES=132, PETRI_TRANSITIONS=84} [2024-11-07 19:37:18,998 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 80 predicate places. [2024-11-07 19:37:18,998 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 84 transitions, 650 flow [2024-11-07 19:37:18,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 12.952380952380953) internal successors, (272), 21 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:37:18,998 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:37:18,998 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] [2024-11-07 19:37:19,010 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-07 19:37:19,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:37:19,198 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-07 19:37:19,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:37:19,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1632491687, now seen corresponding path program 5 times [2024-11-07 19:37:19,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:37:19,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86701319] [2024-11-07 19:37:19,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:37:19,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:37:19,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:37:19,462 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 19:37:19,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:37:19,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86701319] [2024-11-07 19:37:19,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86701319] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:37:19,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814955427] [2024-11-07 19:37:19,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-07 19:37:19,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:37:19,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:37:19,464 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:37:19,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-07 19:37:19,533 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-07 19:37:19,534 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:37:19,535 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-07 19:37:19,537 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:37:19,560 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 15 treesize of output 1 [2024-11-07 19:37:19,734 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 79 treesize of output 55 [2024-11-07 19:37:19,736 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 55 treesize of output 51 [2024-11-07 19:37:19,737 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 51 treesize of output 47 [2024-11-07 19:37:19,772 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 19:37:19,772 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:37:19,946 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 162 treesize of output 158 [2024-11-07 19:37:19,949 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 158 treesize of output 154 [2024-11-07 19:37:21,861 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 310 treesize of output 280 [2024-11-07 19:37:21,900 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:37:21,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 403 treesize of output 405