./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4f9af400 extending candidate: java ['java'] extending candidate: /usr/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/oracle-jdk-bin-*/bin/java ['java', '/usr/bin/java'] extending candidate: /opt/openjdk-*/bin/java ['java', '/usr/bin/java'] extending candidate: /usr/lib/jvm/java-*-openjdk-amd64/bin/java ['java', '/usr/bin/java', '/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java', '/usr/lib/jvm/java-17-openjdk-amd64/bin/java', '/usr/lib/jvm/java-11-openjdk-amd64/bin/java', '/usr/lib/jvm/java-1.17.0-openjdk-amd64/bin/java'] ['/root/.sdkman/candidates/java/21.0.5-tem/bin/java', '-Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config', '-Xmx15G', '-Xms4m', '-jar', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar', '-data', '@noDefault', '-ultimatedata', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data', '-tc', '/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml', '-i', '../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.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', 'a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542'] Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.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 a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-07 19:32:57,619 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-07 19:32:57,705 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-07 19:32:57,714 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-07 19:32:57,714 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-07 19:32:57,742 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-07 19:32:57,745 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-07 19:32:57,745 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-07 19:32:57,746 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-07 19:32:57,747 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-07 19:32:57,747 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-07 19:32:57,747 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-07 19:32:57,748 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-07 19:32:57,748 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-07 19:32:57,748 INFO L153 SettingsManager]: * Use SBE=true [2024-11-07 19:32:57,750 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-07 19:32:57,750 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-07 19:32:57,750 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-07 19:32:57,750 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-07 19:32:57,750 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-07 19:32:57,750 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-07 19:32:57,750 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-07 19:32:57,750 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-07 19:32:57,750 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-07 19:32:57,750 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-07 19:32:57,750 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-07 19:32:57,750 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-07 19:32:57,750 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-07 19:32:57,750 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-07 19:32:57,750 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-07 19:32:57,750 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-07 19:32:57,751 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-07 19:32:57,751 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-07 19:32:57,751 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:32:57,751 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-07 19:32:57,751 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-07 19:32:57,751 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-07 19:32:57,751 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-07 19:32:57,751 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-07 19:32:57,752 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-07 19:32:57,752 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-07 19:32:57,752 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-07 19:32:57,752 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 -> a79fe9fcfc95192d454ac05616e4d9a71dbf2bcc8b4fd9d21dcef47910a50542 [2024-11-07 19:32:58,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-07 19:32:58,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-07 19:32:58,049 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-07 19:32:58,050 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-07 19:32:58,050 INFO L274 PluginConnector]: CDTParser initialized [2024-11-07 19:32:58,051 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2024-11-07 19:32:59,340 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-07 19:32:59,588 INFO L384 CDTParser]: Found 1 translation units. [2024-11-07 19:32:59,592 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2024-11-07 19:32:59,603 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5da21095d/789c71ae1ed24dfcb4f0390718ddac06/FLAGb2f3c86fc [2024-11-07 19:32:59,624 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/5da21095d/789c71ae1ed24dfcb4f0390718ddac06 [2024-11-07 19:32:59,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-07 19:32:59,628 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-07 19:32:59,630 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-07 19:32:59,630 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-07 19:32:59,635 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-07 19:32:59,636 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:32:59" (1/1) ... [2024-11-07 19:32:59,636 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e603aef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:32:59, skipping insertion in model container [2024-11-07 19:32:59,637 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:32:59" (1/1) ... [2024-11-07 19:32:59,655 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-07 19:32:59,842 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-07 19:32:59,848 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:32:59,861 INFO L200 MainTranslator]: Completed pre-run [2024-11-07 19:32:59,894 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:32:59,908 INFO L204 MainTranslator]: Completed translation [2024-11-07 19:32:59,908 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:32:59 WrapperNode [2024-11-07 19:32:59,909 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-07 19:32:59,910 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-07 19:32:59,910 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-07 19:32:59,910 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-07 19:32:59,916 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:32:59" (1/1) ... [2024-11-07 19:32:59,925 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:32:59" (1/1) ... [2024-11-07 19:32:59,959 INFO L138 Inliner]: procedures = 25, calls = 56, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 309 [2024-11-07 19:32:59,959 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-07 19:32:59,960 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-07 19:32:59,960 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-07 19:32:59,960 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-07 19:32:59,967 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:32:59" (1/1) ... [2024-11-07 19:32:59,967 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:32:59" (1/1) ... [2024-11-07 19:32:59,971 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:32:59" (1/1) ... [2024-11-07 19:33:00,001 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-07 19:33:00,001 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:32:59" (1/1) ... [2024-11-07 19:33:00,001 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:32:59" (1/1) ... [2024-11-07 19:33:00,019 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:32:59" (1/1) ... [2024-11-07 19:33:00,028 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:32:59" (1/1) ... [2024-11-07 19:33:00,029 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:32:59" (1/1) ... [2024-11-07 19:33:00,030 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:32:59" (1/1) ... [2024-11-07 19:33:00,035 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-07 19:33:00,036 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-07 19:33:00,036 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-07 19:33:00,036 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-07 19:33:00,037 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:32:59" (1/1) ... [2024-11-07 19:33:00,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:33:00,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:33:00,065 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-07 19:33:00,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-07 19:33:00,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-07 19:33:00,090 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-07 19:33:00,090 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-07 19:33:00,090 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-07 19:33:00,090 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-07 19:33:00,090 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-07 19:33:00,091 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-07 19:33:00,091 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-07 19:33:00,091 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-07 19:33:00,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-07 19:33:00,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-07 19:33:00,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-07 19:33:00,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-07 19:33:00,092 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-07 19:33:00,092 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-07 19:33:00,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-07 19:33:00,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-07 19:33:00,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-07 19:33:00,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-07 19:33:00,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-07 19:33:00,094 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-07 19:33:00,193 INFO L238 CfgBuilder]: Building ICFG [2024-11-07 19:33:00,195 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-07 19:33:00,682 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-07 19:33:00,682 INFO L287 CfgBuilder]: Performing block encoding [2024-11-07 19:33:01,148 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-07 19:33:01,149 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-07 19:33:01,149 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:33:01 BoogieIcfgContainer [2024-11-07 19:33:01,149 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-07 19:33:01,152 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-07 19:33:01,153 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-07 19:33:01,157 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-07 19:33:01,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:32:59" (1/3) ... [2024-11-07 19:33:01,158 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd1d86b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:33:01, skipping insertion in model container [2024-11-07 19:33:01,159 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:32:59" (2/3) ... [2024-11-07 19:33:01,159 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3dd1d86b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:33:01, skipping insertion in model container [2024-11-07 19:33:01,159 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:33:01" (3/3) ... [2024-11-07 19:33:01,160 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2024-11-07 19:33:01,175 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-07 19:33:01,175 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-11-07 19:33:01,175 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-07 19:33:01,260 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-07 19:33:01,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 64 transitions, 156 flow [2024-11-07 19:33:01,336 INFO L124 PetriNetUnfolderBase]: 6/60 cut-off events. [2024-11-07 19:33:01,338 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-07 19:33:01,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 60 events. 6/60 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 132 event pairs, 0 based on Foata normal form. 0/40 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2024-11-07 19:33:01,341 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 64 transitions, 156 flow [2024-11-07 19:33:01,345 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 59 transitions, 142 flow [2024-11-07 19:33:01,356 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 19:33:01,371 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;@75bd65f5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 19:33:01,373 INFO L334 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2024-11-07 19:33:01,377 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 19:33:01,378 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-07 19:33:01,379 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 19:33:01,379 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:01,380 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:33:01,380 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:01,384 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:01,385 INFO L85 PathProgramCache]: Analyzing trace with hash 888770, now seen corresponding path program 1 times [2024-11-07 19:33:01,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:01,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678900148] [2024-11-07 19:33:01,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:01,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:01,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:01,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:01,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678900148] [2024-11-07 19:33:01,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678900148] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:01,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:01,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-07 19:33:01,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503218825] [2024-11-07 19:33:01,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:01,658 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:33:01,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:01,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:33:01,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:33:01,698 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 64 [2024-11-07 19:33:01,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 59 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:01,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:01,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 64 [2024-11-07 19:33:01,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:02,809 INFO L124 PetriNetUnfolderBase]: 4566/6759 cut-off events. [2024-11-07 19:33:02,809 INFO L125 PetriNetUnfolderBase]: For 156/156 co-relation queries the response was YES. [2024-11-07 19:33:02,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13365 conditions, 6759 events. 4566/6759 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 49968 event pairs, 4408 based on Foata normal form. 1/3822 useless extension candidates. Maximal degree in co-relation 12180. Up to 6127 conditions per place. [2024-11-07 19:33:02,903 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 34 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2024-11-07 19:33:02,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 55 transitions, 206 flow [2024-11-07 19:33:02,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:33:02,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:33:02,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 111 transitions. [2024-11-07 19:33:02,916 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.578125 [2024-11-07 19:33:02,918 INFO L175 Difference]: Start difference. First operand has 66 places, 59 transitions, 142 flow. Second operand 3 states and 111 transitions. [2024-11-07 19:33:02,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 55 transitions, 206 flow [2024-11-07 19:33:02,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 55 transitions, 190 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-07 19:33:02,936 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 122 flow [2024-11-07 19:33:02,938 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2024-11-07 19:33:02,942 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -10 predicate places. [2024-11-07 19:33:02,944 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 122 flow [2024-11-07 19:33:02,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:02,944 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:02,945 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-07 19:33:02,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-07 19:33:02,945 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:02,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:02,946 INFO L85 PathProgramCache]: Analyzing trace with hash 888771, now seen corresponding path program 1 times [2024-11-07 19:33:02,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:02,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620469044] [2024-11-07 19:33:02,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:02,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:02,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:03,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:03,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:03,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620469044] [2024-11-07 19:33:03,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620469044] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:03,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:03,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:33:03,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158826595] [2024-11-07 19:33:03,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:03,334 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:33:03,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:03,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:33:03,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:33:03,359 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 64 [2024-11-07 19:33:03,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:03,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:03,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 64 [2024-11-07 19:33:03,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:04,145 INFO L124 PetriNetUnfolderBase]: 4566/6758 cut-off events. [2024-11-07 19:33:04,146 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 19:33:04,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13052 conditions, 6758 events. 4566/6758 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 49988 event pairs, 4408 based on Foata normal form. 0/3820 useless extension candidates. Maximal degree in co-relation 13031. Up to 6131 conditions per place. [2024-11-07 19:33:04,223 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 33 selfloop transitions, 4 changer transitions 0/54 dead transitions. [2024-11-07 19:33:04,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 54 transitions, 194 flow [2024-11-07 19:33:04,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:33:04,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:33:04,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2024-11-07 19:33:04,227 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5234375 [2024-11-07 19:33:04,227 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 122 flow. Second operand 4 states and 134 transitions. [2024-11-07 19:33:04,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 54 transitions, 194 flow [2024-11-07 19:33:04,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 54 transitions, 190 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:33:04,230 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 124 flow [2024-11-07 19:33:04,230 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=124, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2024-11-07 19:33:04,232 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -10 predicate places. [2024-11-07 19:33:04,232 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 124 flow [2024-11-07 19:33:04,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:04,232 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:04,232 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-07 19:33:04,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-07 19:33:04,233 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:04,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:04,233 INFO L85 PathProgramCache]: Analyzing trace with hash 27553988, now seen corresponding path program 1 times [2024-11-07 19:33:04,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:04,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455818625] [2024-11-07 19:33:04,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:04,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:04,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:04,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:04,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:04,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455818625] [2024-11-07 19:33:04,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455818625] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:04,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:04,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:33:04,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158196246] [2024-11-07 19:33:04,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:04,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:33:04,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:04,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:33:04,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:33:04,545 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 64 [2024-11-07 19:33:04,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 124 flow. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:04,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:04,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 64 [2024-11-07 19:33:04,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:05,350 INFO L124 PetriNetUnfolderBase]: 4568/6764 cut-off events. [2024-11-07 19:33:05,350 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 19:33:05,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13069 conditions, 6764 events. 4568/6764 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 49992 event pairs, 4408 based on Foata normal form. 0/3823 useless extension candidates. Maximal degree in co-relation 13045. Up to 6134 conditions per place. [2024-11-07 19:33:05,402 INFO L140 encePairwiseOnDemand]: 56/64 looper letters, 36 selfloop transitions, 7 changer transitions 0/60 dead transitions. [2024-11-07 19:33:05,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 60 transitions, 228 flow [2024-11-07 19:33:05,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:33:05,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:33:05,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 164 transitions. [2024-11-07 19:33:05,406 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5125 [2024-11-07 19:33:05,407 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 124 flow. Second operand 5 states and 164 transitions. [2024-11-07 19:33:05,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 60 transitions, 228 flow [2024-11-07 19:33:05,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 60 transitions, 214 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:33:05,410 INFO L231 Difference]: Finished difference. Result has 60 places, 60 transitions, 169 flow [2024-11-07 19:33:05,411 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=169, PETRI_PLACES=60, PETRI_TRANSITIONS=60} [2024-11-07 19:33:05,412 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -6 predicate places. [2024-11-07 19:33:05,413 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 60 transitions, 169 flow [2024-11-07 19:33:05,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:05,413 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:05,413 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-07 19:33:05,413 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-07 19:33:05,414 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:05,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:05,414 INFO L85 PathProgramCache]: Analyzing trace with hash 709606757, now seen corresponding path program 1 times [2024-11-07 19:33:05,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:05,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33401924] [2024-11-07 19:33:05,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:05,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:05,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:05,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:05,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:05,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33401924] [2024-11-07 19:33:05,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33401924] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:33:05,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619249] [2024-11-07 19:33:05,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:05,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:05,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:33:05,766 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:33:05,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-07 19:33:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:05,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-07 19:33:05,875 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:33:05,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-07 19:33:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:06,172 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:33:06,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:06,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619249] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:33:06,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:33:06,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-07 19:33:06,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115886150] [2024-11-07 19:33:06,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:33:06,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-07 19:33:06,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:06,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-07 19:33:06,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-07 19:33:06,497 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 64 [2024-11-07 19:33:06,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 60 transitions, 169 flow. Second operand has 13 states, 13 states have (on average 25.307692307692307) internal successors, (329), 13 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:06,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:06,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 64 [2024-11-07 19:33:06,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:07,481 INFO L124 PetriNetUnfolderBase]: 4570/6769 cut-off events. [2024-11-07 19:33:07,482 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-07 19:33:07,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13101 conditions, 6769 events. 4570/6769 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 50144 event pairs, 4408 based on Foata normal form. 0/3831 useless extension candidates. Maximal degree in co-relation 13041. Up to 6128 conditions per place. [2024-11-07 19:33:07,548 INFO L140 encePairwiseOnDemand]: 56/64 looper letters, 30 selfloop transitions, 18 changer transitions 0/65 dead transitions. [2024-11-07 19:33:07,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 65 transitions, 287 flow [2024-11-07 19:33:07,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-07 19:33:07,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-07 19:33:07,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 266 transitions. [2024-11-07 19:33:07,552 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4618055555555556 [2024-11-07 19:33:07,552 INFO L175 Difference]: Start difference. First operand has 60 places, 60 transitions, 169 flow. Second operand 9 states and 266 transitions. [2024-11-07 19:33:07,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 65 transitions, 287 flow [2024-11-07 19:33:07,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 65 transitions, 286 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:33:07,554 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 226 flow [2024-11-07 19:33:07,554 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=226, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-11-07 19:33:07,555 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 0 predicate places. [2024-11-07 19:33:07,555 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 226 flow [2024-11-07 19:33:07,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 25.307692307692307) internal successors, (329), 13 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:07,555 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:07,555 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:07,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-07 19:33:07,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:07,756 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:07,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:07,757 INFO L85 PathProgramCache]: Analyzing trace with hash -890472102, now seen corresponding path program 1 times [2024-11-07 19:33:07,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:07,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877355731] [2024-11-07 19:33:07,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:07,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:07,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:07,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:07,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:07,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877355731] [2024-11-07 19:33:07,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877355731] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:07,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:07,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:33:07,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589171618] [2024-11-07 19:33:07,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:07,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:33:07,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:07,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:33:07,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:33:07,864 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2024-11-07 19:33:07,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 226 flow. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:07,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:07,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2024-11-07 19:33:07,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:08,661 INFO L124 PetriNetUnfolderBase]: 5237/7874 cut-off events. [2024-11-07 19:33:08,664 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-07 19:33:08,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15261 conditions, 7874 events. 5237/7874 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 794. Compared 59552 event pairs, 5051 based on Foata normal form. 249/4927 useless extension candidates. Maximal degree in co-relation 13045. Up to 6142 conditions per place. [2024-11-07 19:33:08,711 INFO L140 encePairwiseOnDemand]: 55/64 looper letters, 77 selfloop transitions, 3 changer transitions 0/97 dead transitions. [2024-11-07 19:33:08,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 97 transitions, 500 flow [2024-11-07 19:33:08,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:33:08,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:33:08,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 175 transitions. [2024-11-07 19:33:08,714 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.68359375 [2024-11-07 19:33:08,714 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 226 flow. Second operand 4 states and 175 transitions. [2024-11-07 19:33:08,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 97 transitions, 500 flow [2024-11-07 19:33:08,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 97 transitions, 432 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-11-07 19:33:08,717 INFO L231 Difference]: Finished difference. Result has 64 places, 65 transitions, 199 flow [2024-11-07 19:33:08,718 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=64, PETRI_TRANSITIONS=65} [2024-11-07 19:33:08,718 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2024-11-07 19:33:08,718 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 65 transitions, 199 flow [2024-11-07 19:33:08,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:08,719 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:08,719 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:08,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-07 19:33:08,719 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:08,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:08,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1095779260, now seen corresponding path program 1 times [2024-11-07 19:33:08,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:08,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60677902] [2024-11-07 19:33:08,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:08,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:08,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:08,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:08,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:08,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60677902] [2024-11-07 19:33:08,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60677902] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:08,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:08,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:33:08,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023124900] [2024-11-07 19:33:08,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:08,809 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:33:08,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:08,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:33:08,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:33:08,822 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 64 [2024-11-07 19:33:08,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 65 transitions, 199 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:08,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:08,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 64 [2024-11-07 19:33:08,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:09,330 INFO L124 PetriNetUnfolderBase]: 3403/5266 cut-off events. [2024-11-07 19:33:09,330 INFO L125 PetriNetUnfolderBase]: For 420/420 co-relation queries the response was YES. [2024-11-07 19:33:09,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11408 conditions, 5266 events. 3403/5266 cut-off events. For 420/420 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 38779 event pairs, 3251 based on Foata normal form. 0/3395 useless extension candidates. Maximal degree in co-relation 9958. Up to 4639 conditions per place. [2024-11-07 19:33:09,369 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 42 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2024-11-07 19:33:09,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 63 transitions, 287 flow [2024-11-07 19:33:09,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:33:09,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:33:09,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-11-07 19:33:09,371 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.515625 [2024-11-07 19:33:09,371 INFO L175 Difference]: Start difference. First operand has 64 places, 65 transitions, 199 flow. Second operand 4 states and 132 transitions. [2024-11-07 19:33:09,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 63 transitions, 287 flow [2024-11-07 19:33:09,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 63 transitions, 283 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-07 19:33:09,375 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 199 flow [2024-11-07 19:33:09,375 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-11-07 19:33:09,377 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2024-11-07 19:33:09,377 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 199 flow [2024-11-07 19:33:09,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:09,378 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:09,378 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:09,378 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-07 19:33:09,378 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:09,379 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:09,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1095779259, now seen corresponding path program 1 times [2024-11-07 19:33:09,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:09,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379894680] [2024-11-07 19:33:09,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:09,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:09,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:09,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:09,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379894680] [2024-11-07 19:33:09,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379894680] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:09,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:09,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:33:09,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976917365] [2024-11-07 19:33:09,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:09,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:33:09,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:09,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:33:09,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:33:09,518 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2024-11-07 19:33:09,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 199 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:09,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:09,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2024-11-07 19:33:09,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:10,325 INFO L124 PetriNetUnfolderBase]: 4227/6777 cut-off events. [2024-11-07 19:33:10,326 INFO L125 PetriNetUnfolderBase]: For 548/548 co-relation queries the response was YES. [2024-11-07 19:33:10,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14656 conditions, 6777 events. 4227/6777 cut-off events. For 548/548 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 53537 event pairs, 4066 based on Foata normal form. 255/4822 useless extension candidates. Maximal degree in co-relation 9911. Up to 4655 conditions per place. [2024-11-07 19:33:10,389 INFO L140 encePairwiseOnDemand]: 57/64 looper letters, 64 selfloop transitions, 5 changer transitions 0/86 dead transitions. [2024-11-07 19:33:10,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 86 transitions, 403 flow [2024-11-07 19:33:10,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:33:10,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:33:10,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 168 transitions. [2024-11-07 19:33:10,392 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65625 [2024-11-07 19:33:10,392 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 199 flow. Second operand 4 states and 168 transitions. [2024-11-07 19:33:10,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 86 transitions, 403 flow [2024-11-07 19:33:10,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 86 transitions, 393 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:33:10,398 INFO L231 Difference]: Finished difference. Result has 65 places, 63 transitions, 208 flow [2024-11-07 19:33:10,398 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=208, PETRI_PLACES=65, PETRI_TRANSITIONS=63} [2024-11-07 19:33:10,398 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -1 predicate places. [2024-11-07 19:33:10,398 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 63 transitions, 208 flow [2024-11-07 19:33:10,399 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:10,399 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:10,399 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:10,399 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-07 19:33:10,399 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:10,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:10,401 INFO L85 PathProgramCache]: Analyzing trace with hash -828811114, now seen corresponding path program 1 times [2024-11-07 19:33:10,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:10,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042835602] [2024-11-07 19:33:10,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:10,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:10,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:10,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:33:10,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:10,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042835602] [2024-11-07 19:33:10,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042835602] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:10,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:10,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:33:10,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583343516] [2024-11-07 19:33:10,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:10,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-07 19:33:10,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:10,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-07 19:33:10,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-07 19:33:10,540 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 64 [2024-11-07 19:33:10,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 63 transitions, 208 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:10,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:10,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 64 [2024-11-07 19:33:10,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:11,009 INFO L124 PetriNetUnfolderBase]: 2874/4728 cut-off events. [2024-11-07 19:33:11,010 INFO L125 PetriNetUnfolderBase]: For 836/836 co-relation queries the response was YES. [2024-11-07 19:33:11,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10815 conditions, 4728 events. 2874/4728 cut-off events. For 836/836 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 36358 event pairs, 2756 based on Foata normal form. 0/3432 useless extension candidates. Maximal degree in co-relation 6932. Up to 4074 conditions per place. [2024-11-07 19:33:11,099 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 37 selfloop transitions, 7 changer transitions 0/61 dead transitions. [2024-11-07 19:33:11,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 61 transitions, 288 flow [2024-11-07 19:33:11,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:33:11,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:33:11,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-11-07 19:33:11,101 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48125 [2024-11-07 19:33:11,101 INFO L175 Difference]: Start difference. First operand has 65 places, 63 transitions, 208 flow. Second operand 5 states and 154 transitions. [2024-11-07 19:33:11,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 61 transitions, 288 flow [2024-11-07 19:33:11,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 61 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:33:11,104 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 210 flow [2024-11-07 19:33:11,104 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=210, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2024-11-07 19:33:11,105 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 0 predicate places. [2024-11-07 19:33:11,105 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 210 flow [2024-11-07 19:33:11,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:11,105 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:11,105 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:11,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-07 19:33:11,106 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:11,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:11,106 INFO L85 PathProgramCache]: Analyzing trace with hash -828811113, now seen corresponding path program 1 times [2024-11-07 19:33:11,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:11,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481805875] [2024-11-07 19:33:11,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:11,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:11,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:11,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:11,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481805875] [2024-11-07 19:33:11,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481805875] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:11,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:11,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:33:11,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844203077] [2024-11-07 19:33:11,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:11,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:33:11,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:11,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:33:11,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:33:11,360 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 64 [2024-11-07 19:33:11,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 210 flow. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:11,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:11,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 64 [2024-11-07 19:33:11,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:11,633 INFO L124 PetriNetUnfolderBase]: 1825/3123 cut-off events. [2024-11-07 19:33:11,633 INFO L125 PetriNetUnfolderBase]: For 614/614 co-relation queries the response was YES. [2024-11-07 19:33:11,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6912 conditions, 3123 events. 1825/3123 cut-off events. For 614/614 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 23122 event pairs, 1742 based on Foata normal form. 0/2534 useless extension candidates. Maximal degree in co-relation 3805. Up to 2669 conditions per place. [2024-11-07 19:33:11,653 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 38 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2024-11-07 19:33:11,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 59 transitions, 286 flow [2024-11-07 19:33:11,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:33:11,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:33:11,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-11-07 19:33:11,655 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-07 19:33:11,655 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 210 flow. Second operand 4 states and 128 transitions. [2024-11-07 19:33:11,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 59 transitions, 286 flow [2024-11-07 19:33:11,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 59 transitions, 275 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:33:11,658 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 199 flow [2024-11-07 19:33:11,658 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=199, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-11-07 19:33:11,659 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -2 predicate places. [2024-11-07 19:33:11,659 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 199 flow [2024-11-07 19:33:11,659 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:11,659 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:11,659 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:11,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-07 19:33:11,659 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:11,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:11,660 INFO L85 PathProgramCache]: Analyzing trace with hash 746146854, now seen corresponding path program 1 times [2024-11-07 19:33:11,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:11,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248784689] [2024-11-07 19:33:11,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:11,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:11,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:11,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:11,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:11,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248784689] [2024-11-07 19:33:11,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248784689] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:11,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:11,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:33:11,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864415804] [2024-11-07 19:33:11,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:11,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:33:11,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:11,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:33:11,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:33:11,907 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2024-11-07 19:33:11,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 199 flow. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:11,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:11,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2024-11-07 19:33:11,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:12,099 INFO L124 PetriNetUnfolderBase]: 1199/2183 cut-off events. [2024-11-07 19:33:12,100 INFO L125 PetriNetUnfolderBase]: For 460/460 co-relation queries the response was YES. [2024-11-07 19:33:12,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4625 conditions, 2183 events. 1199/2183 cut-off events. For 460/460 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 15981 event pairs, 1132 based on Foata normal form. 0/1931 useless extension candidates. Maximal degree in co-relation 3217. Up to 1784 conditions per place. [2024-11-07 19:33:12,111 INFO L140 encePairwiseOnDemand]: 60/64 looper letters, 34 selfloop transitions, 6 changer transitions 0/57 dead transitions. [2024-11-07 19:33:12,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 57 transitions, 271 flow [2024-11-07 19:33:12,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:33:12,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:33:12,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2024-11-07 19:33:12,112 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5234375 [2024-11-07 19:33:12,113 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 199 flow. Second operand 4 states and 134 transitions. [2024-11-07 19:33:12,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 57 transitions, 271 flow [2024-11-07 19:33:12,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 57 transitions, 266 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:33:12,115 INFO L231 Difference]: Finished difference. Result has 63 places, 57 transitions, 198 flow [2024-11-07 19:33:12,115 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=63, PETRI_TRANSITIONS=57} [2024-11-07 19:33:12,116 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -3 predicate places. [2024-11-07 19:33:12,116 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 198 flow [2024-11-07 19:33:12,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:12,116 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:12,116 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:12,116 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-07 19:33:12,117 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:12,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:12,117 INFO L85 PathProgramCache]: Analyzing trace with hash 126588631, now seen corresponding path program 1 times [2024-11-07 19:33:12,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:12,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916893078] [2024-11-07 19:33:12,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:12,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:12,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:12,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:12,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916893078] [2024-11-07 19:33:12,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916893078] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:12,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:12,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:33:12,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638915813] [2024-11-07 19:33:12,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:12,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:33:12,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:12,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:33:12,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:33:12,371 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 64 [2024-11-07 19:33:12,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 198 flow. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:12,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:12,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 64 [2024-11-07 19:33:12,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:12,631 INFO L124 PetriNetUnfolderBase]: 1773/3093 cut-off events. [2024-11-07 19:33:12,631 INFO L125 PetriNetUnfolderBase]: For 705/705 co-relation queries the response was YES. [2024-11-07 19:33:12,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6666 conditions, 3093 events. 1773/3093 cut-off events. For 705/705 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 21376 event pairs, 249 based on Foata normal form. 208/3192 useless extension candidates. Maximal degree in co-relation 5454. Up to 1473 conditions per place. [2024-11-07 19:33:12,647 INFO L140 encePairwiseOnDemand]: 59/64 looper letters, 62 selfloop transitions, 6 changer transitions 1/84 dead transitions. [2024-11-07 19:33:12,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 84 transitions, 410 flow [2024-11-07 19:33:12,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-07 19:33:12,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-07 19:33:12,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 178 transitions. [2024-11-07 19:33:12,648 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.55625 [2024-11-07 19:33:12,649 INFO L175 Difference]: Start difference. First operand has 63 places, 57 transitions, 198 flow. Second operand 5 states and 178 transitions. [2024-11-07 19:33:12,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 84 transitions, 410 flow [2024-11-07 19:33:12,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 84 transitions, 401 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:33:12,652 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 204 flow [2024-11-07 19:33:12,652 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=189, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=204, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2024-11-07 19:33:12,652 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 0 predicate places. [2024-11-07 19:33:12,652 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 204 flow [2024-11-07 19:33:12,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:12,653 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:12,653 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:12,653 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-07 19:33:12,653 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:12,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:12,654 INFO L85 PathProgramCache]: Analyzing trace with hash 2071444897, now seen corresponding path program 1 times [2024-11-07 19:33:12,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:12,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081238615] [2024-11-07 19:33:12,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:12,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:12,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:12,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:33:12,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:12,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081238615] [2024-11-07 19:33:12,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081238615] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:12,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:12,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-07 19:33:12,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801475869] [2024-11-07 19:33:12,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:12,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:33:12,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:12,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:33:12,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-07 19:33:12,913 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 64 [2024-11-07 19:33:12,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:12,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:12,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 64 [2024-11-07 19:33:12,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:13,279 INFO L124 PetriNetUnfolderBase]: 2041/3212 cut-off events. [2024-11-07 19:33:13,279 INFO L125 PetriNetUnfolderBase]: For 2193/2639 co-relation queries the response was YES. [2024-11-07 19:33:13,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8161 conditions, 3212 events. 2041/3212 cut-off events. For 2193/2639 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 19778 event pairs, 249 based on Foata normal form. 572/3756 useless extension candidates. Maximal degree in co-relation 8122. Up to 1940 conditions per place. [2024-11-07 19:33:13,299 INFO L140 encePairwiseOnDemand]: 57/64 looper letters, 69 selfloop transitions, 9 changer transitions 0/93 dead transitions. [2024-11-07 19:33:13,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 93 transitions, 476 flow [2024-11-07 19:33:13,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:33:13,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:33:13,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 211 transitions. [2024-11-07 19:33:13,301 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5494791666666666 [2024-11-07 19:33:13,301 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 204 flow. Second operand 6 states and 211 transitions. [2024-11-07 19:33:13,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 93 transitions, 476 flow [2024-11-07 19:33:13,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 93 transitions, 463 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:33:13,304 INFO L231 Difference]: Finished difference. Result has 70 places, 62 transitions, 257 flow [2024-11-07 19:33:13,305 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=257, PETRI_PLACES=70, PETRI_TRANSITIONS=62} [2024-11-07 19:33:13,305 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 4 predicate places. [2024-11-07 19:33:13,305 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 62 transitions, 257 flow [2024-11-07 19:33:13,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.8) internal successors, (144), 5 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:13,306 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:13,306 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:13,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-07 19:33:13,306 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:13,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:13,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1345613659, now seen corresponding path program 2 times [2024-11-07 19:33:13,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:13,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244064071] [2024-11-07 19:33:13,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:13,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:13,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:13,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:33:13,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:13,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244064071] [2024-11-07 19:33:13,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244064071] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:33:13,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544086597] [2024-11-07 19:33:13,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:33:13,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:13,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:33:13,500 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:33:13,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-07 19:33:13,618 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:33:13,618 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:33:13,620 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-07 19:33:13,623 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:33:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:33:13,745 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:33:13,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-07 19:33:13,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544086597] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-07 19:33:13,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-07 19:33:13,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2024-11-07 19:33:13,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309082215] [2024-11-07 19:33:13,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:13,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-07 19:33:13,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:13,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-07 19:33:13,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-07 19:33:13,832 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 64 [2024-11-07 19:33:13,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 62 transitions, 257 flow. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:13,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:13,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 64 [2024-11-07 19:33:13,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:14,357 INFO L124 PetriNetUnfolderBase]: 4095/6330 cut-off events. [2024-11-07 19:33:14,357 INFO L125 PetriNetUnfolderBase]: For 6532/7194 co-relation queries the response was YES. [2024-11-07 19:33:14,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17619 conditions, 6330 events. 4095/6330 cut-off events. For 6532/7194 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 42534 event pairs, 501 based on Foata normal form. 680/6927 useless extension candidates. Maximal degree in co-relation 17577. Up to 1947 conditions per place. [2024-11-07 19:33:14,387 INFO L140 encePairwiseOnDemand]: 57/64 looper letters, 80 selfloop transitions, 16 changer transitions 0/110 dead transitions. [2024-11-07 19:33:14,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 110 transitions, 617 flow [2024-11-07 19:33:14,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:33:14,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:33:14,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 216 transitions. [2024-11-07 19:33:14,391 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-11-07 19:33:14,391 INFO L175 Difference]: Start difference. First operand has 70 places, 62 transitions, 257 flow. Second operand 6 states and 216 transitions. [2024-11-07 19:33:14,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 110 transitions, 617 flow [2024-11-07 19:33:14,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 110 transitions, 601 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-07 19:33:14,400 INFO L231 Difference]: Finished difference. Result has 76 places, 71 transitions, 361 flow [2024-11-07 19:33:14,400 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=76, PETRI_TRANSITIONS=71} [2024-11-07 19:33:14,401 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 10 predicate places. [2024-11-07 19:33:14,401 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 71 transitions, 361 flow [2024-11-07 19:33:14,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:14,402 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:14,402 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:14,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-07 19:33:14,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:14,602 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:14,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:14,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1352211191, now seen corresponding path program 1 times [2024-11-07 19:33:14,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:14,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518751696] [2024-11-07 19:33:14,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:14,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:14,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:15,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:15,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:15,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518751696] [2024-11-07 19:33:15,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518751696] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:33:15,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949209643] [2024-11-07 19:33:15,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:15,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:15,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:33:15,265 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:33:15,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-07 19:33:15,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:15,389 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-07 19:33:15,393 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:33:15,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-07 19:33:15,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-07 19:33:15,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-07 19:33:15,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-07 19:33:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:15,796 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:33:15,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2024-11-07 19:33:15,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-07 19:33:16,428 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2024-11-07 19:33:16,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2024-11-07 19:33:16,491 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:16,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949209643] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:33:16,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:33:16,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-07 19:33:16,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367101003] [2024-11-07 19:33:16,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:33:16,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-07 19:33:16,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:16,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-07 19:33:16,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2024-11-07 19:33:16,670 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2024-11-07 19:33:16,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 71 transitions, 361 flow. Second operand has 18 states, 18 states have (on average 29.555555555555557) internal successors, (532), 18 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:16,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:16,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2024-11-07 19:33:16,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:19,635 INFO L124 PetriNetUnfolderBase]: 10674/18279 cut-off events. [2024-11-07 19:33:19,635 INFO L125 PetriNetUnfolderBase]: For 47137/49502 co-relation queries the response was YES. [2024-11-07 19:33:19,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57532 conditions, 18279 events. 10674/18279 cut-off events. For 47137/49502 co-relation queries the response was YES. Maximal size of possible extension queue 1016. Compared 149258 event pairs, 417 based on Foata normal form. 1675/19517 useless extension candidates. Maximal degree in co-relation 29921. Up to 4950 conditions per place. [2024-11-07 19:33:19,738 INFO L140 encePairwiseOnDemand]: 53/64 looper letters, 277 selfloop transitions, 80 changer transitions 6/386 dead transitions. [2024-11-07 19:33:19,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 386 transitions, 2491 flow [2024-11-07 19:33:19,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-07 19:33:19,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-07 19:33:19,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1034 transitions. [2024-11-07 19:33:19,741 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5983796296296297 [2024-11-07 19:33:19,741 INFO L175 Difference]: Start difference. First operand has 76 places, 71 transitions, 361 flow. Second operand 27 states and 1034 transitions. [2024-11-07 19:33:19,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 386 transitions, 2491 flow [2024-11-07 19:33:19,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 386 transitions, 2438 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-11-07 19:33:19,781 INFO L231 Difference]: Finished difference. Result has 112 places, 147 transitions, 1221 flow [2024-11-07 19:33:19,781 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1221, PETRI_PLACES=112, PETRI_TRANSITIONS=147} [2024-11-07 19:33:19,781 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 46 predicate places. [2024-11-07 19:33:19,781 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 147 transitions, 1221 flow [2024-11-07 19:33:19,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 29.555555555555557) internal successors, (532), 18 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:19,781 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:19,782 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:19,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-07 19:33:19,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:19,982 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:19,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:19,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1044612970, now seen corresponding path program 1 times [2024-11-07 19:33:19,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:19,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786469221] [2024-11-07 19:33:19,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:19,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:20,961 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:20,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:20,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786469221] [2024-11-07 19:33:20,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786469221] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:33:20,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404173219] [2024-11-07 19:33:20,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:20,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:20,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:33:20,964 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:33:20,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-07 19:33:21,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:21,081 INFO L255 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-07 19:33:21,084 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:33:21,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-07 19:33:21,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-07 19:33:21,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2024-11-07 19:33:21,282 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:33:21,282 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:33:21,336 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:33:21,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-11-07 19:33:21,456 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-07 19:33:21,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404173219] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:33:21,457 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:33:21,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 5] total 16 [2024-11-07 19:33:21,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345843797] [2024-11-07 19:33:21,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:33:21,457 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-07 19:33:21,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:21,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-07 19:33:21,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2024-11-07 19:33:21,615 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2024-11-07 19:33:21,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 147 transitions, 1221 flow. Second operand has 17 states, 17 states have (on average 29.823529411764707) internal successors, (507), 17 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:21,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:21,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2024-11-07 19:33:21,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:24,219 INFO L124 PetriNetUnfolderBase]: 11955/20540 cut-off events. [2024-11-07 19:33:24,219 INFO L125 PetriNetUnfolderBase]: For 84540/86558 co-relation queries the response was YES. [2024-11-07 19:33:24,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71945 conditions, 20540 events. 11955/20540 cut-off events. For 84540/86558 co-relation queries the response was YES. Maximal size of possible extension queue 1184. Compared 173074 event pairs, 1113 based on Foata normal form. 1125/21231 useless extension candidates. Maximal degree in co-relation 68122. Up to 8941 conditions per place. [2024-11-07 19:33:24,398 INFO L140 encePairwiseOnDemand]: 53/64 looper letters, 154 selfloop transitions, 62 changer transitions 1/240 dead transitions. [2024-11-07 19:33:24,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 240 transitions, 2203 flow [2024-11-07 19:33:24,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-07 19:33:24,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-07 19:33:24,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 590 transitions. [2024-11-07 19:33:24,400 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5121527777777778 [2024-11-07 19:33:24,400 INFO L175 Difference]: Start difference. First operand has 112 places, 147 transitions, 1221 flow. Second operand 18 states and 590 transitions. [2024-11-07 19:33:24,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 240 transitions, 2203 flow [2024-11-07 19:33:24,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 240 transitions, 2125 flow, removed 38 selfloop flow, removed 1 redundant places. [2024-11-07 19:33:24,938 INFO L231 Difference]: Finished difference. Result has 134 places, 171 transitions, 1605 flow [2024-11-07 19:33:24,939 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=1143, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1605, PETRI_PLACES=134, PETRI_TRANSITIONS=171} [2024-11-07 19:33:24,939 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 68 predicate places. [2024-11-07 19:33:24,939 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 171 transitions, 1605 flow [2024-11-07 19:33:24,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 29.823529411764707) internal successors, (507), 17 states have internal predecessors, (507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:24,939 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:24,940 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:24,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-07 19:33:25,140 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,SelfDestructingSolverStorable14 [2024-11-07 19:33:25,140 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:25,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:25,140 INFO L85 PathProgramCache]: Analyzing trace with hash -868748429, now seen corresponding path program 2 times [2024-11-07 19:33:25,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:25,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418472846] [2024-11-07 19:33:25,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:25,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:25,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:25,280 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:33:25,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:25,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418472846] [2024-11-07 19:33:25,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418472846] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:33:25,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933310972] [2024-11-07 19:33:25,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-07 19:33:25,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:25,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:33:25,284 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:33:25,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-07 19:33:25,409 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-07 19:33:25,410 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:33:25,411 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-07 19:33:25,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:33:25,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:33:25,460 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:33:25,583 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:33:25,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933310972] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:33:25,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:33:25,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 8 [2024-11-07 19:33:25,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56401605] [2024-11-07 19:33:25,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:33:25,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-07 19:33:25,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:25,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-07 19:33:25,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-11-07 19:33:25,603 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2024-11-07 19:33:25,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 171 transitions, 1605 flow. Second operand has 8 states, 8 states have (on average 32.75) internal successors, (262), 8 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:25,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:25,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2024-11-07 19:33:25,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:29,290 INFO L124 PetriNetUnfolderBase]: 19900/34307 cut-off events. [2024-11-07 19:33:29,290 INFO L125 PetriNetUnfolderBase]: For 133498/135905 co-relation queries the response was YES. [2024-11-07 19:33:29,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117342 conditions, 34307 events. 19900/34307 cut-off events. For 133498/135905 co-relation queries the response was YES. Maximal size of possible extension queue 1845. Compared 315122 event pairs, 2706 based on Foata normal form. 1606/34939 useless extension candidates. Maximal degree in co-relation 117254. Up to 14941 conditions per place. [2024-11-07 19:33:29,770 INFO L140 encePairwiseOnDemand]: 61/64 looper letters, 160 selfloop transitions, 59 changer transitions 0/242 dead transitions. [2024-11-07 19:33:29,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 242 transitions, 2513 flow [2024-11-07 19:33:29,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:33:29,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:33:29,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 172 transitions. [2024-11-07 19:33:29,772 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.671875 [2024-11-07 19:33:29,772 INFO L175 Difference]: Start difference. First operand has 134 places, 171 transitions, 1605 flow. Second operand 4 states and 172 transitions. [2024-11-07 19:33:29,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 242 transitions, 2513 flow [2024-11-07 19:33:30,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 242 transitions, 2433 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-11-07 19:33:30,352 INFO L231 Difference]: Finished difference. Result has 132 places, 190 transitions, 2007 flow [2024-11-07 19:33:30,352 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=1470, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2007, PETRI_PLACES=132, PETRI_TRANSITIONS=190} [2024-11-07 19:33:30,352 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 66 predicate places. [2024-11-07 19:33:30,353 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 190 transitions, 2007 flow [2024-11-07 19:33:30,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 32.75) internal successors, (262), 8 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:30,353 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:30,353 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:30,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-07 19:33:30,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-07 19:33:30,555 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:30,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:30,556 INFO L85 PathProgramCache]: Analyzing trace with hash -597106712, now seen corresponding path program 1 times [2024-11-07 19:33:30,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:30,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145445705] [2024-11-07 19:33:30,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:30,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:30,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:30,648 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-07 19:33:30,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:30,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145445705] [2024-11-07 19:33:30,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145445705] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:33:30,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:33:30,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-07 19:33:30,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061928497] [2024-11-07 19:33:30,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:33:30,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:33:30,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:30,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:33:30,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:33:30,653 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2024-11-07 19:33:30,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 190 transitions, 2007 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:30,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:30,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2024-11-07 19:33:30,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:34,905 INFO L124 PetriNetUnfolderBase]: 22150/37156 cut-off events. [2024-11-07 19:33:34,905 INFO L125 PetriNetUnfolderBase]: For 196586/199694 co-relation queries the response was YES. [2024-11-07 19:33:35,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 134897 conditions, 37156 events. 22150/37156 cut-off events. For 196586/199694 co-relation queries the response was YES. Maximal size of possible extension queue 1797. Compared 327623 event pairs, 8452 based on Foata normal form. 1794/37362 useless extension candidates. Maximal degree in co-relation 134808. Up to 17299 conditions per place. [2024-11-07 19:33:35,249 INFO L140 encePairwiseOnDemand]: 61/64 looper letters, 206 selfloop transitions, 11 changer transitions 0/240 dead transitions. [2024-11-07 19:33:35,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 240 transitions, 3026 flow [2024-11-07 19:33:35,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:33:35,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:33:35,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2024-11-07 19:33:35,250 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-11-07 19:33:35,250 INFO L175 Difference]: Start difference. First operand has 132 places, 190 transitions, 2007 flow. Second operand 3 states and 124 transitions. [2024-11-07 19:33:35,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 240 transitions, 3026 flow [2024-11-07 19:33:35,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 240 transitions, 2999 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-07 19:33:35,978 INFO L231 Difference]: Finished difference. Result has 134 places, 191 transitions, 2050 flow [2024-11-07 19:33:35,979 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=1987, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2050, PETRI_PLACES=134, PETRI_TRANSITIONS=191} [2024-11-07 19:33:35,979 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 68 predicate places. [2024-11-07 19:33:35,979 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 191 transitions, 2050 flow [2024-11-07 19:33:35,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:35,979 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:35,979 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:35,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-07 19:33:35,979 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:35,980 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:35,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1243868511, now seen corresponding path program 3 times [2024-11-07 19:33:35,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:35,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276235018] [2024-11-07 19:33:35,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:35,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:36,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:37,071 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:37,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:37,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276235018] [2024-11-07 19:33:37,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276235018] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:33:37,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946274706] [2024-11-07 19:33:37,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-07 19:33:37,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:37,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:33:37,074 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:33:37,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-07 19:33:37,213 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-07 19:33:37,213 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-07 19:33:37,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-07 19:33:37,222 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:33:37,577 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 9 treesize of output 7 [2024-11-07 19:33:37,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-07 19:33:37,818 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:33:37,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 12 [2024-11-07 19:33:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:37,831 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:33:38,171 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-07 19:33:38,171 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 51 [2024-11-07 19:33:38,176 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-07 19:33:38,490 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:33:38,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946274706] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:33:38,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:33:38,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 27 [2024-11-07 19:33:38,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892514432] [2024-11-07 19:33:38,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:33:38,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-07 19:33:38,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:38,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-07 19:33:38,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2024-11-07 19:33:38,974 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 64 [2024-11-07 19:33:38,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 191 transitions, 2050 flow. Second operand has 28 states, 28 states have (on average 28.642857142857142) internal successors, (802), 28 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:38,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:38,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 64 [2024-11-07 19:33:38,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:33:53,196 INFO L124 PetriNetUnfolderBase]: 54007/90533 cut-off events. [2024-11-07 19:33:53,197 INFO L125 PetriNetUnfolderBase]: For 363119/369011 co-relation queries the response was YES. [2024-11-07 19:33:53,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 321358 conditions, 90533 events. 54007/90533 cut-off events. For 363119/369011 co-relation queries the response was YES. Maximal size of possible extension queue 3617. Compared 857532 event pairs, 4302 based on Foata normal form. 3920/92896 useless extension candidates. Maximal degree in co-relation 321260. Up to 19990 conditions per place. [2024-11-07 19:33:54,049 INFO L140 encePairwiseOnDemand]: 53/64 looper letters, 557 selfloop transitions, 281 changer transitions 62/923 dead transitions. [2024-11-07 19:33:54,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 923 transitions, 8697 flow [2024-11-07 19:33:54,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-11-07 19:33:54,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2024-11-07 19:33:54,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 2001 transitions. [2024-11-07 19:33:54,053 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5899174528301887 [2024-11-07 19:33:54,053 INFO L175 Difference]: Start difference. First operand has 134 places, 191 transitions, 2050 flow. Second operand 53 states and 2001 transitions. [2024-11-07 19:33:54,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 923 transitions, 8697 flow [2024-11-07 19:33:56,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 923 transitions, 8665 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-07 19:33:56,218 INFO L231 Difference]: Finished difference. Result has 212 places, 415 transitions, 5727 flow [2024-11-07 19:33:56,219 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=64, PETRI_DIFFERENCE_MINUEND_FLOW=2039, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=5727, PETRI_PLACES=212, PETRI_TRANSITIONS=415} [2024-11-07 19:33:56,219 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 146 predicate places. [2024-11-07 19:33:56,219 INFO L471 AbstractCegarLoop]: Abstraction has has 212 places, 415 transitions, 5727 flow [2024-11-07 19:33:56,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 28.642857142857142) internal successors, (802), 28 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:56,220 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:33:56,220 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-07 19:33:56,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-07 19:33:56,420 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,SelfDestructingSolverStorable17 [2024-11-07 19:33:56,420 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-07 19:33:56,421 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:33:56,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1211427130, now seen corresponding path program 1 times [2024-11-07 19:33:56,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:33:56,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512845551] [2024-11-07 19:33:56,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:56,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:33:56,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:56,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-07 19:33:56,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:33:56,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512845551] [2024-11-07 19:33:56,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512845551] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:33:56,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571397460] [2024-11-07 19:33:56,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:33:56,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:33:56,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:33:56,935 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-07 19:33:56,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-07 19:33:57,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:33:57,063 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-07 19:33:57,065 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:33:57,500 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 19:33:57,501 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:33:57,960 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 19:33:57,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571397460] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:33:57,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:33:57,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 12] total 27 [2024-11-07 19:33:57,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101642092] [2024-11-07 19:33:57,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:33:57,960 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-07 19:33:57,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:33:57,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-07 19:33:57,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2024-11-07 19:33:58,046 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 64 [2024-11-07 19:33:58,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 415 transitions, 5727 flow. Second operand has 28 states, 28 states have (on average 18.892857142857142) internal successors, (529), 28 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:33:58,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:33:58,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 64 [2024-11-07 19:33:58,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand