./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i --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/goblint-regression/28-race_reach_72-funloop_hard_racing.i', '-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', '566e2cbe460cf96671c9cef5a53ce51910e23c462e96f394be80b957976729c5'] 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/goblint-regression/28-race_reach_72-funloop_hard_racing.i -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 566e2cbe460cf96671c9cef5a53ce51910e23c462e96f394be80b957976729c5 --- Real Ultimate output --- This is Ultimate 0.3.0-?-4f9af40 [2024-11-07 19:26:01,151 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-07 19:26:01,262 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-07 19:26:01,268 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-07 19:26:01,270 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-07 19:26:01,296 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-07 19:26:01,297 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-07 19:26:01,297 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-07 19:26:01,298 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-07 19:26:01,298 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-07 19:26:01,299 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-07 19:26:01,299 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-07 19:26:01,299 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-07 19:26:01,300 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-07 19:26:01,300 INFO L153 SettingsManager]: * Use SBE=true [2024-11-07 19:26:01,300 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-07 19:26:01,300 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-07 19:26:01,300 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-07 19:26:01,301 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-07 19:26:01,301 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-07 19:26:01,301 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-07 19:26:01,301 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-07 19:26:01,301 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-07 19:26:01,301 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-07 19:26:01,301 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-07 19:26:01,301 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-07 19:26:01,302 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-07 19:26:01,302 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-07 19:26:01,302 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-07 19:26:01,302 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-07 19:26:01,302 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-07 19:26:01,303 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-07 19:26:01,303 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-07 19:26:01,303 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:26:01,303 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-07 19:26:01,303 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-07 19:26:01,303 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-07 19:26:01,304 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-07 19:26:01,304 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-07 19:26:01,304 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-07 19:26:01,304 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-07 19:26:01,304 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-07 19:26:01,304 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 -> 566e2cbe460cf96671c9cef5a53ce51910e23c462e96f394be80b957976729c5 [2024-11-07 19:26:01,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-07 19:26:01,625 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-07 19:26:01,629 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-07 19:26:01,630 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-07 19:26:01,630 INFO L274 PluginConnector]: CDTParser initialized [2024-11-07 19:26:01,632 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2024-11-07 19:26:02,935 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-07 19:26:03,317 INFO L384 CDTParser]: Found 1 translation units. [2024-11-07 19:26:03,319 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_72-funloop_hard_racing.i [2024-11-07 19:26:03,342 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/94deb4941/a39aacbf0bc642678002c53c5d764080/FLAG566aee2e9 [2024-11-07 19:26:03,366 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/94deb4941/a39aacbf0bc642678002c53c5d764080 [2024-11-07 19:26:03,370 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-07 19:26:03,372 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-07 19:26:03,375 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-07 19:26:03,375 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-07 19:26:03,379 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-07 19:26:03,381 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:26:03" (1/1) ... [2024-11-07 19:26:03,383 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75f26636 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:03, skipping insertion in model container [2024-11-07 19:26:03,383 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:26:03" (1/1) ... [2024-11-07 19:26:03,429 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-07 19:26:03,787 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:26:03,820 INFO L200 MainTranslator]: Completed pre-run [2024-11-07 19:26:03,901 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-07 19:26:03,965 INFO L204 MainTranslator]: Completed translation [2024-11-07 19:26:03,966 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:03 WrapperNode [2024-11-07 19:26:03,967 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-07 19:26:03,968 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-07 19:26:03,968 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-07 19:26:03,969 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-07 19:26:03,976 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:03" (1/1) ... [2024-11-07 19:26:04,000 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:03" (1/1) ... [2024-11-07 19:26:04,050 INFO L138 Inliner]: procedures = 272, calls = 110, calls flagged for inlining = 7, calls inlined = 10, statements flattened = 350 [2024-11-07 19:26:04,051 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-07 19:26:04,053 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-07 19:26:04,053 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-07 19:26:04,053 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-07 19:26:04,062 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:03" (1/1) ... [2024-11-07 19:26:04,062 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:03" (1/1) ... [2024-11-07 19:26:04,070 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:03" (1/1) ... [2024-11-07 19:26:04,088 INFO L175 MemorySlicer]: Split 84 memory accesses to 4 slices as follows [2, 5, 2, 75]. 89 percent of accesses are in the largest equivalence class. The 67 initializations are split as follows [2, 5, 0, 60]. The 7 writes are split as follows [0, 0, 1, 6]. [2024-11-07 19:26:04,088 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:03" (1/1) ... [2024-11-07 19:26:04,088 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:03" (1/1) ... [2024-11-07 19:26:04,106 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:03" (1/1) ... [2024-11-07 19:26:04,111 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:03" (1/1) ... [2024-11-07 19:26:04,114 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:03" (1/1) ... [2024-11-07 19:26:04,120 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:03" (1/1) ... [2024-11-07 19:26:04,124 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-07 19:26:04,125 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-07 19:26:04,126 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-07 19:26:04,126 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-07 19:26:04,127 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:03" (1/1) ... [2024-11-07 19:26:04,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-07 19:26:04,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:26:04,171 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 19:26:04,177 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 19:26:04,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-07 19:26:04,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-07 19:26:04,201 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-11-07 19:26:04,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-07 19:26:04,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-07 19:26:04,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-07 19:26:04,201 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-07 19:26:04,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-07 19:26:04,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-07 19:26:04,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-07 19:26:04,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-07 19:26:04,202 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-11-07 19:26:04,202 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-07 19:26:04,202 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-11-07 19:26:04,203 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-11-07 19:26:04,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-07 19:26:04,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-07 19:26:04,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-07 19:26:04,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-07 19:26:04,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-07 19:26:04,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-07 19:26:04,205 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 19:26:04,387 INFO L238 CfgBuilder]: Building ICFG [2024-11-07 19:26:04,389 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-07 19:26:04,991 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-07 19:26:04,991 INFO L287 CfgBuilder]: Performing block encoding [2024-11-07 19:26:05,557 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-07 19:26:05,559 INFO L316 CfgBuilder]: Removed 35 assume(true) statements. [2024-11-07 19:26:05,559 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:26:05 BoogieIcfgContainer [2024-11-07 19:26:05,559 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-07 19:26:05,562 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-07 19:26:05,563 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-07 19:26:05,569 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-07 19:26:05,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:26:03" (1/3) ... [2024-11-07 19:26:05,571 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32c0498f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:26:05, skipping insertion in model container [2024-11-07 19:26:05,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:26:03" (2/3) ... [2024-11-07 19:26:05,571 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32c0498f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:26:05, skipping insertion in model container [2024-11-07 19:26:05,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:26:05" (3/3) ... [2024-11-07 19:26:05,572 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_72-funloop_hard_racing.i [2024-11-07 19:26:05,589 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-07 19:26:05,590 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2024-11-07 19:26:05,590 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-07 19:26:05,675 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-11-07 19:26:05,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 159 places, 199 transitions, 405 flow [2024-11-07 19:26:05,809 INFO L124 PetriNetUnfolderBase]: 70/329 cut-off events. [2024-11-07 19:26:05,812 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-07 19:26:05,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 329 events. 70/329 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1963 event pairs, 0 based on Foata normal form. 0/191 useless extension candidates. Maximal degree in co-relation 192. Up to 8 conditions per place. [2024-11-07 19:26:05,822 INFO L82 GeneralOperation]: Start removeDead. Operand has 159 places, 199 transitions, 405 flow [2024-11-07 19:26:05,833 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 199 transitions, 405 flow [2024-11-07 19:26:05,845 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 19:26:05,860 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;@1b54eb24, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 19:26:05,860 INFO L334 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2024-11-07 19:26:05,869 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 19:26:05,869 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-11-07 19:26:05,869 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 19:26:05,869 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:26:05,870 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-07 19:26:05,870 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-07 19:26:05,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:26:05,874 INFO L85 PathProgramCache]: Analyzing trace with hash 28070051, now seen corresponding path program 1 times [2024-11-07 19:26:05,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:26:05,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155005697] [2024-11-07 19:26:05,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:26:05,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:26:06,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:26:06,180 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 19:26:06,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:26:06,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155005697] [2024-11-07 19:26:06,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155005697] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:26:06,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:26:06,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:26:06,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766415222] [2024-11-07 19:26:06,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:26:06,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:26:06,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:26:06,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:26:06,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:26:06,221 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 199 [2024-11-07 19:26:06,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 199 transitions, 405 flow. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:26:06,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:26:06,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 199 [2024-11-07 19:26:06,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:26:06,963 INFO L124 PetriNetUnfolderBase]: 1085/3642 cut-off events. [2024-11-07 19:26:06,963 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-07 19:26:06,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5704 conditions, 3642 events. 1085/3642 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 32638 event pairs, 924 based on Foata normal form. 734/3839 useless extension candidates. Maximal degree in co-relation 5534. Up to 2056 conditions per place. [2024-11-07 19:26:06,995 INFO L140 encePairwiseOnDemand]: 160/199 looper letters, 72 selfloop transitions, 2 changer transitions 0/161 dead transitions. [2024-11-07 19:26:06,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 161 transitions, 477 flow [2024-11-07 19:26:06,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:26:07,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:26:07,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 372 transitions. [2024-11-07 19:26:07,012 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6231155778894473 [2024-11-07 19:26:07,015 INFO L175 Difference]: Start difference. First operand has 159 places, 199 transitions, 405 flow. Second operand 3 states and 372 transitions. [2024-11-07 19:26:07,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 161 transitions, 477 flow [2024-11-07 19:26:07,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 161 transitions, 477 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-07 19:26:07,027 INFO L231 Difference]: Finished difference. Result has 159 places, 161 transitions, 339 flow [2024-11-07 19:26:07,030 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=339, PETRI_PLACES=159, PETRI_TRANSITIONS=161} [2024-11-07 19:26:07,035 INFO L277 CegarLoopForPetriNet]: 159 programPoint places, 0 predicate places. [2024-11-07 19:26:07,035 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 161 transitions, 339 flow [2024-11-07 19:26:07,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:26:07,036 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:26:07,036 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-07 19:26:07,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-07 19:26:07,037 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-07 19:26:07,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:26:07,038 INFO L85 PathProgramCache]: Analyzing trace with hash 870261621, now seen corresponding path program 1 times [2024-11-07 19:26:07,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:26:07,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332043754] [2024-11-07 19:26:07,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:26:07,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:26:07,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:26:07,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:26:07,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:26:07,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332043754] [2024-11-07 19:26:07,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332043754] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:26:07,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189826675] [2024-11-07 19:26:07,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:26:07,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:26:07,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:26:07,231 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 19:26:07,232 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 19:26:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:26:07,355 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-07 19:26:07,359 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:26:07,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:26:07,401 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:26:07,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:26:07,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189826675] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:26:07,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:26:07,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-07 19:26:07,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032318462] [2024-11-07 19:26:07,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:26:07,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-07 19:26:07,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:26:07,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-07 19:26:07,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-07 19:26:07,427 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 199 [2024-11-07 19:26:07,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 161 transitions, 339 flow. Second operand has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 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 19:26:07,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:26:07,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 199 [2024-11-07 19:26:07,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:26:08,033 INFO L124 PetriNetUnfolderBase]: 1085/3645 cut-off events. [2024-11-07 19:26:08,033 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-07 19:26:08,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5720 conditions, 3645 events. 1085/3645 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 32606 event pairs, 924 based on Foata normal form. 0/3108 useless extension candidates. Maximal degree in co-relation 5708. Up to 2056 conditions per place. [2024-11-07 19:26:08,062 INFO L140 encePairwiseOnDemand]: 196/199 looper letters, 72 selfloop transitions, 5 changer transitions 0/164 dead transitions. [2024-11-07 19:26:08,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 164 transitions, 505 flow [2024-11-07 19:26:08,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:26:08,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:26:08,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 602 transitions. [2024-11-07 19:26:08,066 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5041876046901173 [2024-11-07 19:26:08,066 INFO L175 Difference]: Start difference. First operand has 159 places, 161 transitions, 339 flow. Second operand 6 states and 602 transitions. [2024-11-07 19:26:08,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 164 transitions, 505 flow [2024-11-07 19:26:08,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 164 transitions, 501 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-07 19:26:08,071 INFO L231 Difference]: Finished difference. Result has 166 places, 164 transitions, 371 flow [2024-11-07 19:26:08,072 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=371, PETRI_PLACES=166, PETRI_TRANSITIONS=164} [2024-11-07 19:26:08,073 INFO L277 CegarLoopForPetriNet]: 159 programPoint places, 7 predicate places. [2024-11-07 19:26:08,073 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 164 transitions, 371 flow [2024-11-07 19:26:08,073 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 88.28571428571429) internal successors, (618), 7 states have internal predecessors, (618), 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 19:26:08,073 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:26:08,073 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-11-07 19:26:08,095 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 19:26:08,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:26:08,279 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-07 19:26:08,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:26:08,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1630762275, now seen corresponding path program 2 times [2024-11-07 19:26:08,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:26:08,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819539057] [2024-11-07 19:26:08,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:26:08,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:26:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:26:08,438 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-07 19:26:08,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:26:08,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819539057] [2024-11-07 19:26:08,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819539057] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:26:08,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:26:08,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:26:08,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401176296] [2024-11-07 19:26:08,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:26:08,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:26:08,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:26:08,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:26:08,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:26:08,488 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 199 [2024-11-07 19:26:08,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 164 transitions, 371 flow. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 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 19:26:08,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:26:08,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 199 [2024-11-07 19:26:08,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:26:09,009 INFO L124 PetriNetUnfolderBase]: 1131/3712 cut-off events. [2024-11-07 19:26:09,011 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-07 19:26:09,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5891 conditions, 3712 events. 1131/3712 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 33037 event pairs, 924 based on Foata normal form. 0/3215 useless extension candidates. Maximal degree in co-relation 5857. Up to 2052 conditions per place. [2024-11-07 19:26:09,035 INFO L140 encePairwiseOnDemand]: 195/199 looper letters, 99 selfloop transitions, 2 changer transitions 0/184 dead transitions. [2024-11-07 19:26:09,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 184 transitions, 613 flow [2024-11-07 19:26:09,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:26:09,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:26:09,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 348 transitions. [2024-11-07 19:26:09,039 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5829145728643216 [2024-11-07 19:26:09,039 INFO L175 Difference]: Start difference. First operand has 166 places, 164 transitions, 371 flow. Second operand 3 states and 348 transitions. [2024-11-07 19:26:09,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 184 transitions, 613 flow [2024-11-07 19:26:09,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 184 transitions, 599 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-07 19:26:09,047 INFO L231 Difference]: Finished difference. Result has 165 places, 162 transitions, 357 flow [2024-11-07 19:26:09,047 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=357, PETRI_PLACES=165, PETRI_TRANSITIONS=162} [2024-11-07 19:26:09,048 INFO L277 CegarLoopForPetriNet]: 159 programPoint places, 6 predicate places. [2024-11-07 19:26:09,048 INFO L471 AbstractCegarLoop]: Abstraction has has 165 places, 162 transitions, 357 flow [2024-11-07 19:26:09,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 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 19:26:09,048 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:26:09,048 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-11-07 19:26:09,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-07 19:26:09,048 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-07 19:26:09,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:26:09,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1630762276, now seen corresponding path program 1 times [2024-11-07 19:26:09,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:26:09,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375016341] [2024-11-07 19:26:09,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:26:09,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:26:09,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:26:09,200 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:26:09,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:26:09,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375016341] [2024-11-07 19:26:09,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375016341] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:26:09,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158158298] [2024-11-07 19:26:09,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:26:09,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:26:09,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:26:09,205 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 19:26:09,207 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 19:26:09,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:26:09,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-07 19:26:09,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:26:09,340 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:26:09,340 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:26:09,404 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:26:09,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158158298] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:26:09,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:26:09,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-07 19:26:09,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866619785] [2024-11-07 19:26:09,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:26:09,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-07 19:26:09,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:26:09,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-07 19:26:09,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-07 19:26:09,409 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 199 [2024-11-07 19:26:09,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 162 transitions, 357 flow. Second operand has 13 states, 13 states have (on average 88.15384615384616) internal successors, (1146), 13 states have internal predecessors, (1146), 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 19:26:09,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:26:09,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 199 [2024-11-07 19:26:09,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:26:09,922 INFO L124 PetriNetUnfolderBase]: 1085/3627 cut-off events. [2024-11-07 19:26:09,922 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2024-11-07 19:26:09,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5751 conditions, 3627 events. 1085/3627 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 32277 event pairs, 924 based on Foata normal form. 6/3121 useless extension candidates. Maximal degree in co-relation 5699. Up to 2056 conditions per place. [2024-11-07 19:26:09,943 INFO L140 encePairwiseOnDemand]: 196/199 looper letters, 72 selfloop transitions, 11 changer transitions 0/168 dead transitions. [2024-11-07 19:26:09,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 168 transitions, 559 flow [2024-11-07 19:26:09,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-07 19:26:09,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-07 19:26:09,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1133 transitions. [2024-11-07 19:26:09,948 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47445561139028475 [2024-11-07 19:26:09,948 INFO L175 Difference]: Start difference. First operand has 165 places, 162 transitions, 357 flow. Second operand 12 states and 1133 transitions. [2024-11-07 19:26:09,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 168 transitions, 559 flow [2024-11-07 19:26:09,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 168 transitions, 555 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:26:09,957 INFO L231 Difference]: Finished difference. Result has 180 places, 168 transitions, 437 flow [2024-11-07 19:26:09,958 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=437, PETRI_PLACES=180, PETRI_TRANSITIONS=168} [2024-11-07 19:26:09,959 INFO L277 CegarLoopForPetriNet]: 159 programPoint places, 21 predicate places. [2024-11-07 19:26:09,959 INFO L471 AbstractCegarLoop]: Abstraction has has 180 places, 168 transitions, 437 flow [2024-11-07 19:26:09,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 88.15384615384616) internal successors, (1146), 13 states have internal predecessors, (1146), 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 19:26:09,960 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:26:09,960 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2024-11-07 19:26:09,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-07 19:26:10,163 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:26:10,164 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-07 19:26:10,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:26:10,165 INFO L85 PathProgramCache]: Analyzing trace with hash 336622564, now seen corresponding path program 2 times [2024-11-07 19:26:10,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:26:10,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072751301] [2024-11-07 19:26:10,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:26:10,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:26:10,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:26:10,363 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-07 19:26:10,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:26:10,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072751301] [2024-11-07 19:26:10,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072751301] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:26:10,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:26:10,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:26:10,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976218542] [2024-11-07 19:26:10,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:26:10,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:26:10,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:26:10,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:26:10,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:26:10,407 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 199 [2024-11-07 19:26:10,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 168 transitions, 437 flow. Second operand has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:26:10,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:26:10,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 199 [2024-11-07 19:26:10,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:26:10,890 INFO L124 PetriNetUnfolderBase]: 1059/3350 cut-off events. [2024-11-07 19:26:10,890 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-11-07 19:26:10,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5458 conditions, 3350 events. 1059/3350 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 29635 event pairs, 0 based on Foata normal form. 1/2916 useless extension candidates. Maximal degree in co-relation 5382. Up to 2019 conditions per place. [2024-11-07 19:26:10,924 INFO L140 encePairwiseOnDemand]: 195/199 looper letters, 105 selfloop transitions, 2 changer transitions 0/191 dead transitions. [2024-11-07 19:26:10,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 191 transitions, 697 flow [2024-11-07 19:26:10,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:26:10,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:26:10,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 357 transitions. [2024-11-07 19:26:10,926 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5979899497487438 [2024-11-07 19:26:10,927 INFO L175 Difference]: Start difference. First operand has 180 places, 168 transitions, 437 flow. Second operand 3 states and 357 transitions. [2024-11-07 19:26:10,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 191 transitions, 697 flow [2024-11-07 19:26:10,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 191 transitions, 649 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-11-07 19:26:10,935 INFO L231 Difference]: Finished difference. Result has 178 places, 168 transitions, 399 flow [2024-11-07 19:26:10,937 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=399, PETRI_PLACES=178, PETRI_TRANSITIONS=168} [2024-11-07 19:26:10,938 INFO L277 CegarLoopForPetriNet]: 159 programPoint places, 19 predicate places. [2024-11-07 19:26:10,939 INFO L471 AbstractCegarLoop]: Abstraction has has 178 places, 168 transitions, 399 flow [2024-11-07 19:26:10,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:26:10,939 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:26:10,939 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1] [2024-11-07 19:26:10,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-07 19:26:10,940 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-07 19:26:10,940 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:26:10,941 INFO L85 PathProgramCache]: Analyzing trace with hash -284018499, now seen corresponding path program 1 times [2024-11-07 19:26:10,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:26:10,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438429960] [2024-11-07 19:26:10,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:26:10,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:26:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:26:11,159 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-07 19:26:11,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:26:11,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438429960] [2024-11-07 19:26:11,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438429960] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:26:11,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452143032] [2024-11-07 19:26:11,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:26:11,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:26:11,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:26:11,163 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 19:26:11,164 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 19:26:11,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:26:11,285 INFO L255 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-07 19:26:11,287 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:26:11,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-07 19:26:11,392 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-07 19:26:11,393 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:26:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-07 19:26:11,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452143032] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:26:11,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:26:11,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-07 19:26:11,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177127134] [2024-11-07 19:26:11,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:26:11,470 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-07 19:26:11,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:26:11,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-07 19:26:11,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-11-07 19:26:11,668 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 85 out of 199 [2024-11-07 19:26:11,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 168 transitions, 399 flow. Second operand has 7 states, 7 states have (on average 87.71428571428571) internal successors, (614), 7 states have internal predecessors, (614), 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 19:26:11,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:26:11,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 85 of 199 [2024-11-07 19:26:11,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:26:11,824 INFO L124 PetriNetUnfolderBase]: 72/276 cut-off events. [2024-11-07 19:26:11,824 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2024-11-07 19:26:11,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 532 conditions, 276 events. 72/276 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1126 event pairs, 34 based on Foata normal form. 44/292 useless extension candidates. Maximal degree in co-relation 479. Up to 132 conditions per place. [2024-11-07 19:26:11,828 INFO L140 encePairwiseOnDemand]: 195/199 looper letters, 61 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2024-11-07 19:26:11,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 90 transitions, 362 flow [2024-11-07 19:26:11,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-07 19:26:11,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-07 19:26:11,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 395 transitions. [2024-11-07 19:26:11,830 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4962311557788945 [2024-11-07 19:26:11,830 INFO L175 Difference]: Start difference. First operand has 178 places, 168 transitions, 399 flow. Second operand 4 states and 395 transitions. [2024-11-07 19:26:11,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 90 transitions, 362 flow [2024-11-07 19:26:11,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 90 transitions, 356 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-07 19:26:11,835 INFO L231 Difference]: Finished difference. Result has 80 places, 66 transitions, 186 flow [2024-11-07 19:26:11,835 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=80, PETRI_TRANSITIONS=66} [2024-11-07 19:26:11,837 INFO L277 CegarLoopForPetriNet]: 159 programPoint places, -79 predicate places. [2024-11-07 19:26:11,837 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 66 transitions, 186 flow [2024-11-07 19:26:11,838 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 87.71428571428571) internal successors, (614), 7 states have internal predecessors, (614), 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 19:26:11,838 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:26:11,839 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1] [2024-11-07 19:26:11,856 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 19:26:12,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:26:12,040 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2024-11-07 19:26:12,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:26:12,040 INFO L85 PathProgramCache]: Analyzing trace with hash -214637841, now seen corresponding path program 1 times [2024-11-07 19:26:12,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:26:12,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178520536] [2024-11-07 19:26:12,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:26:12,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:26:12,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 19:26:12,093 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-07 19:26:12,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-07 19:26:12,159 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-11-07 19:26:12,159 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-11-07 19:26:12,160 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2024-11-07 19:26:12,162 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 50 remaining) [2024-11-07 19:26:12,162 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2024-11-07 19:26:12,162 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2024-11-07 19:26:12,162 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2024-11-07 19:26:12,162 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 50 remaining) [2024-11-07 19:26:12,162 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2024-11-07 19:26:12,162 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK (42 of 50 remaining) [2024-11-07 19:26:12,163 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2024-11-07 19:26:12,163 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 50 remaining) [2024-11-07 19:26:12,163 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2024-11-07 19:26:12,163 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 50 remaining) [2024-11-07 19:26:12,163 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2024-11-07 19:26:12,163 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2024-11-07 19:26:12,163 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2024-11-07 19:26:12,163 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2024-11-07 19:26:12,163 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 50 remaining) [2024-11-07 19:26:12,163 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2024-11-07 19:26:12,163 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2024-11-07 19:26:12,163 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 50 remaining) [2024-11-07 19:26:12,163 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 50 remaining) [2024-11-07 19:26:12,163 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2024-11-07 19:26:12,163 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 50 remaining) [2024-11-07 19:26:12,163 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2024-11-07 19:26:12,164 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (25 of 50 remaining) [2024-11-07 19:26:12,164 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2024-11-07 19:26:12,164 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2024-11-07 19:26:12,164 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK (22 of 50 remaining) [2024-11-07 19:26:12,164 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2024-11-07 19:26:12,164 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2024-11-07 19:26:12,164 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2024-11-07 19:26:12,164 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2024-11-07 19:26:12,164 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2024-11-07 19:26:12,164 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2024-11-07 19:26:12,164 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2024-11-07 19:26:12,164 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2024-11-07 19:26:12,164 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2024-11-07 19:26:12,164 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2024-11-07 19:26:12,164 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 50 remaining) [2024-11-07 19:26:12,164 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2024-11-07 19:26:12,164 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2024-11-07 19:26:12,165 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2024-11-07 19:26:12,165 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2024-11-07 19:26:12,165 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2024-11-07 19:26:12,165 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2024-11-07 19:26:12,165 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2024-11-07 19:26:12,165 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2024-11-07 19:26:12,165 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2024-11-07 19:26:12,165 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2024-11-07 19:26:12,168 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 50 remaining) [2024-11-07 19:26:12,168 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-07 19:26:12,168 INFO L407 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2024-11-07 19:26:12,171 WARN L244 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-11-07 19:26:12,171 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-11-07 19:26:12,229 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-07 19:26:12,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 262 transitions, 540 flow [2024-11-07 19:26:12,291 INFO L124 PetriNetUnfolderBase]: 113/534 cut-off events. [2024-11-07 19:26:12,291 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-07 19:26:12,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 546 conditions, 534 events. 113/534 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3477 event pairs, 0 based on Foata normal form. 0/311 useless extension candidates. Maximal degree in co-relation 331. Up to 12 conditions per place. [2024-11-07 19:26:12,298 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 262 transitions, 540 flow [2024-11-07 19:26:12,305 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 262 transitions, 540 flow [2024-11-07 19:26:12,307 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-07 19:26:12,308 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;@1b54eb24, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-07 19:26:12,308 INFO L334 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2024-11-07 19:26:12,311 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-07 19:26:12,311 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-11-07 19:26:12,311 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-07 19:26:12,311 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:26:12,311 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-07 19:26:12,311 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2024-11-07 19:26:12,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:26:12,312 INFO L85 PathProgramCache]: Analyzing trace with hash 36135459, now seen corresponding path program 1 times [2024-11-07 19:26:12,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:26:12,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355743886] [2024-11-07 19:26:12,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:26:12,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:26:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:26:12,348 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 19:26:12,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:26:12,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355743886] [2024-11-07 19:26:12,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355743886] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:26:12,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:26:12,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:26:12,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115606875] [2024-11-07 19:26:12,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:26:12,349 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:26:12,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:26:12,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:26:12,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:26:12,350 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 262 [2024-11-07 19:26:12,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 262 transitions, 540 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 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 19:26:12,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:26:12,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 262 [2024-11-07 19:26:12,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:26:18,995 INFO L124 PetriNetUnfolderBase]: 47750/105628 cut-off events. [2024-11-07 19:26:18,995 INFO L125 PetriNetUnfolderBase]: For 206/206 co-relation queries the response was YES. [2024-11-07 19:26:19,229 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174866 conditions, 105628 events. 47750/105628 cut-off events. For 206/206 co-relation queries the response was YES. Maximal size of possible extension queue 2991. Compared 1280559 event pairs, 42147 based on Foata normal form. 24746/116376 useless extension candidates. Maximal degree in co-relation 168894. Up to 69120 conditions per place. [2024-11-07 19:26:19,716 INFO L140 encePairwiseOnDemand]: 211/262 looper letters, 96 selfloop transitions, 2 changer transitions 0/211 dead transitions. [2024-11-07 19:26:19,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 211 transitions, 634 flow [2024-11-07 19:26:19,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:26:19,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:26:19,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 486 transitions. [2024-11-07 19:26:19,719 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6183206106870229 [2024-11-07 19:26:19,719 INFO L175 Difference]: Start difference. First operand has 209 places, 262 transitions, 540 flow. Second operand 3 states and 486 transitions. [2024-11-07 19:26:19,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 211 transitions, 634 flow [2024-11-07 19:26:19,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 211 transitions, 634 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-07 19:26:19,726 INFO L231 Difference]: Finished difference. Result has 208 places, 211 transitions, 448 flow [2024-11-07 19:26:19,726 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=448, PETRI_PLACES=208, PETRI_TRANSITIONS=211} [2024-11-07 19:26:19,727 INFO L277 CegarLoopForPetriNet]: 209 programPoint places, -1 predicate places. [2024-11-07 19:26:19,728 INFO L471 AbstractCegarLoop]: Abstraction has has 208 places, 211 transitions, 448 flow [2024-11-07 19:26:19,728 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 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 19:26:19,728 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:26:19,728 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-07 19:26:19,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-07 19:26:19,729 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2024-11-07 19:26:19,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:26:19,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1120289531, now seen corresponding path program 1 times [2024-11-07 19:26:19,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:26:19,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737085155] [2024-11-07 19:26:19,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:26:19,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:26:19,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:26:19,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:26:19,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:26:19,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737085155] [2024-11-07 19:26:19,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737085155] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:26:19,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563481764] [2024-11-07 19:26:19,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:26:19,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:26:19,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:26:19,776 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 19:26:19,779 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 19:26:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:26:19,874 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-07 19:26:19,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:26:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:26:19,884 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:26:19,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:26:19,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563481764] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:26:19,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:26:19,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-07 19:26:19,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885800055] [2024-11-07 19:26:19,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:26:19,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-07 19:26:19,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:26:19,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-07 19:26:19,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-11-07 19:26:19,902 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 262 [2024-11-07 19:26:19,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 211 transitions, 448 flow. Second operand has 7 states, 7 states have (on average 114.28571428571429) internal successors, (800), 7 states have internal predecessors, (800), 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 19:26:19,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:26:19,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 262 [2024-11-07 19:26:19,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:26:26,214 INFO L124 PetriNetUnfolderBase]: 47750/105631 cut-off events. [2024-11-07 19:26:26,215 INFO L125 PetriNetUnfolderBase]: For 206/206 co-relation queries the response was YES. [2024-11-07 19:26:26,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174882 conditions, 105631 events. 47750/105631 cut-off events. For 206/206 co-relation queries the response was YES. Maximal size of possible extension queue 2991. Compared 1280435 event pairs, 42147 based on Foata normal form. 0/91633 useless extension candidates. Maximal degree in co-relation 174869. Up to 69120 conditions per place. [2024-11-07 19:26:26,925 INFO L140 encePairwiseOnDemand]: 259/262 looper letters, 96 selfloop transitions, 5 changer transitions 0/214 dead transitions. [2024-11-07 19:26:26,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 214 transitions, 662 flow [2024-11-07 19:26:26,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-07 19:26:26,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-07 19:26:26,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 782 transitions. [2024-11-07 19:26:26,928 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49745547073791346 [2024-11-07 19:26:26,928 INFO L175 Difference]: Start difference. First operand has 208 places, 211 transitions, 448 flow. Second operand 6 states and 782 transitions. [2024-11-07 19:26:26,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 214 transitions, 662 flow [2024-11-07 19:26:26,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 214 transitions, 658 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-07 19:26:26,933 INFO L231 Difference]: Finished difference. Result has 215 places, 214 transitions, 480 flow [2024-11-07 19:26:26,934 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=480, PETRI_PLACES=215, PETRI_TRANSITIONS=214} [2024-11-07 19:26:26,935 INFO L277 CegarLoopForPetriNet]: 209 programPoint places, 6 predicate places. [2024-11-07 19:26:26,935 INFO L471 AbstractCegarLoop]: Abstraction has has 215 places, 214 transitions, 480 flow [2024-11-07 19:26:26,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 114.28571428571429) internal successors, (800), 7 states have internal predecessors, (800), 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 19:26:26,935 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:26:26,936 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-11-07 19:26:26,950 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 19:26:27,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-07 19:26:27,137 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2024-11-07 19:26:27,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:26:27,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1555769309, now seen corresponding path program 2 times [2024-11-07 19:26:27,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:26:27,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137700414] [2024-11-07 19:26:27,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:26:27,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:26:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:26:27,197 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-07 19:26:27,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:26:27,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137700414] [2024-11-07 19:26:27,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137700414] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:26:27,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:26:27,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:26:27,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675397927] [2024-11-07 19:26:27,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:26:27,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:26:27,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:26:27,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:26:27,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:26:27,242 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 262 [2024-11-07 19:26:27,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 214 transitions, 480 flow. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:26:27,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:26:27,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 262 [2024-11-07 19:26:27,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:26:33,881 INFO L124 PetriNetUnfolderBase]: 49801/108783 cut-off events. [2024-11-07 19:26:33,881 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2024-11-07 19:26:34,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181101 conditions, 108783 events. 49801/108783 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 3038. Compared 1310434 event pairs, 42126 based on Foata normal form. 0/95104 useless extension candidates. Maximal degree in co-relation 181066. Up to 69039 conditions per place. [2024-11-07 19:26:34,663 INFO L140 encePairwiseOnDemand]: 258/262 looper letters, 145 selfloop transitions, 2 changer transitions 0/256 dead transitions. [2024-11-07 19:26:34,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 256 transitions, 858 flow [2024-11-07 19:26:34,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-07 19:26:34,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-07 19:26:34,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 472 transitions. [2024-11-07 19:26:34,666 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6005089058524173 [2024-11-07 19:26:34,666 INFO L175 Difference]: Start difference. First operand has 215 places, 214 transitions, 480 flow. Second operand 3 states and 472 transitions. [2024-11-07 19:26:34,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 256 transitions, 858 flow [2024-11-07 19:26:34,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 256 transitions, 844 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-07 19:26:34,672 INFO L231 Difference]: Finished difference. Result has 214 places, 212 transitions, 466 flow [2024-11-07 19:26:34,673 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=466, PETRI_PLACES=214, PETRI_TRANSITIONS=212} [2024-11-07 19:26:34,673 INFO L277 CegarLoopForPetriNet]: 209 programPoint places, 5 predicate places. [2024-11-07 19:26:34,673 INFO L471 AbstractCegarLoop]: Abstraction has has 214 places, 212 transitions, 466 flow [2024-11-07 19:26:34,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-07 19:26:34,674 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:26:34,674 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2024-11-07 19:26:34,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-07 19:26:34,674 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2024-11-07 19:26:34,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:26:34,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1555769308, now seen corresponding path program 1 times [2024-11-07 19:26:34,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:26:34,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251775691] [2024-11-07 19:26:34,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:26:34,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:26:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:26:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:26:34,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:26:34,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251775691] [2024-11-07 19:26:34,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251775691] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-07 19:26:34,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011861911] [2024-11-07 19:26:34,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:26:34,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-07 19:26:34,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2024-11-07 19:26:34,763 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 19:26:34,765 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 19:26:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:26:34,872 INFO L255 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-07 19:26:34,873 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-07 19:26:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:26:34,894 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-07 19:26:34,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-07 19:26:34,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011861911] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-07 19:26:34,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-07 19:26:34,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-07 19:26:34,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101940423] [2024-11-07 19:26:34,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-07 19:26:34,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-07 19:26:34,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:26:34,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-07 19:26:34,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-11-07 19:26:34,957 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 262 [2024-11-07 19:26:34,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 212 transitions, 466 flow. Second operand has 13 states, 13 states have (on average 114.15384615384616) internal successors, (1484), 13 states have internal predecessors, (1484), 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 19:26:34,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:26:34,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 262 [2024-11-07 19:26:34,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-07 19:26:41,456 INFO L124 PetriNetUnfolderBase]: 47750/105311 cut-off events. [2024-11-07 19:26:41,457 INFO L125 PetriNetUnfolderBase]: For 459/459 co-relation queries the response was YES. [2024-11-07 19:26:41,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175117 conditions, 105311 events. 47750/105311 cut-off events. For 459/459 co-relation queries the response was YES. Maximal size of possible extension queue 2977. Compared 1272548 event pairs, 42147 based on Foata normal form. 6/91646 useless extension candidates. Maximal degree in co-relation 175064. Up to 69120 conditions per place. [2024-11-07 19:26:42,230 INFO L140 encePairwiseOnDemand]: 259/262 looper letters, 96 selfloop transitions, 11 changer transitions 0/218 dead transitions. [2024-11-07 19:26:42,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 218 transitions, 716 flow [2024-11-07 19:26:42,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-07 19:26:42,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-07 19:26:42,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1469 transitions. [2024-11-07 19:26:42,233 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4672391857506361 [2024-11-07 19:26:42,233 INFO L175 Difference]: Start difference. First operand has 214 places, 212 transitions, 466 flow. Second operand 12 states and 1469 transitions. [2024-11-07 19:26:42,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 218 transitions, 716 flow [2024-11-07 19:26:42,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 218 transitions, 712 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-07 19:26:42,275 INFO L231 Difference]: Finished difference. Result has 229 places, 218 transitions, 546 flow [2024-11-07 19:26:42,275 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=262, PETRI_DIFFERENCE_MINUEND_FLOW=462, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=546, PETRI_PLACES=229, PETRI_TRANSITIONS=218} [2024-11-07 19:26:42,276 INFO L277 CegarLoopForPetriNet]: 209 programPoint places, 20 predicate places. [2024-11-07 19:26:42,276 INFO L471 AbstractCegarLoop]: Abstraction has has 229 places, 218 transitions, 546 flow [2024-11-07 19:26:42,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 114.15384615384616) internal successors, (1484), 13 states have internal predecessors, (1484), 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 19:26:42,277 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-07 19:26:42,277 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2024-11-07 19:26:42,291 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 19:26:42,477 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,SelfDestructingSolverStorable10 [2024-11-07 19:26:42,478 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2024-11-07 19:26:42,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-07 19:26:42,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1672976092, now seen corresponding path program 2 times [2024-11-07 19:26:42,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-07 19:26:42,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569073820] [2024-11-07 19:26:42,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-07 19:26:42,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-07 19:26:42,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-07 19:26:42,788 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-07 19:26:42,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-07 19:26:42,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569073820] [2024-11-07 19:26:42,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569073820] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-07 19:26:42,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-07 19:26:42,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-07 19:26:42,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229642943] [2024-11-07 19:26:42,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-07 19:26:42,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-07 19:26:42,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-07 19:26:42,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-07 19:26:42,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-07 19:26:42,838 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 262 [2024-11-07 19:26:42,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 218 transitions, 546 flow. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 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 19:26:42,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-07 19:26:42,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 262 [2024-11-07 19:26:42,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand