./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ed7ffa-5c00-42c9-b0e1-7649442e1180/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ed7ffa-5c00-42c9-b0e1-7649442e1180/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ed7ffa-5c00-42c9-b0e1-7649442e1180/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ed7ffa-5c00-42c9-b0e1-7649442e1180/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ed7ffa-5c00-42c9-b0e1-7649442e1180/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ed7ffa-5c00-42c9-b0e1-7649442e1180/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 12:14:15,356 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:14:15,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:14:15,376 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:14:15,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:14:15,377 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:14:15,383 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:14:15,388 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:14:15,391 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:14:15,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:14:15,398 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:14:15,399 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:14:15,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:14:15,406 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:14:15,408 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:14:15,409 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:14:15,409 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:14:15,410 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:14:15,412 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:14:15,413 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:14:15,415 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:14:15,420 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:14:15,424 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:14:15,425 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:14:15,436 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:14:15,442 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:14:15,442 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:14:15,443 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:14:15,445 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:14:15,446 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:14:15,447 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:14:15,448 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:14:15,449 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:14:15,451 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:14:15,453 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:14:15,453 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:14:15,454 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:14:15,455 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:14:15,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:14:15,456 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:14:15,456 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:14:15,457 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ed7ffa-5c00-42c9-b0e1-7649442e1180/bin/uautomizer-tPACEb0tL8/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-16 12:14:15,483 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:14:15,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:14:15,484 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:14:15,484 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:14:15,485 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:14:15,485 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:14:15,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:14:15,486 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:14:15,486 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:14:15,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:14:15,487 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:14:15,487 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:14:15,487 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:14:15,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:14:15,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:14:15,488 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:14:15,488 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:14:15,488 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:14:15,489 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-16 12:14:15,489 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:14:15,489 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:14:15,489 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:14:15,489 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:14:15,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:14:15,490 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:14:15,490 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:14:15,490 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:14:15,491 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:14:15,491 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:14:15,491 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:14:15,491 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:14:15,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:14:15,492 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:14:15,492 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:14:15,492 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:14:15,492 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ed7ffa-5c00-42c9-b0e1-7649442e1180/bin/uautomizer-tPACEb0tL8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ed7ffa-5c00-42c9-b0e1-7649442e1180/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 [2022-11-16 12:14:15,785 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:14:15,805 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:14:15,808 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:14:15,810 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:14:15,811 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:14:15,812 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ed7ffa-5c00-42c9-b0e1-7649442e1180/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2022-11-16 12:14:15,887 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ed7ffa-5c00-42c9-b0e1-7649442e1180/bin/uautomizer-tPACEb0tL8/data/34706d942/7d051fe848ef453580d992f7e048ff41/FLAGd90df17a4 [2022-11-16 12:14:16,325 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:14:16,325 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ed7ffa-5c00-42c9-b0e1-7649442e1180/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2022-11-16 12:14:16,332 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ed7ffa-5c00-42c9-b0e1-7649442e1180/bin/uautomizer-tPACEb0tL8/data/34706d942/7d051fe848ef453580d992f7e048ff41/FLAGd90df17a4 [2022-11-16 12:14:16,717 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ed7ffa-5c00-42c9-b0e1-7649442e1180/bin/uautomizer-tPACEb0tL8/data/34706d942/7d051fe848ef453580d992f7e048ff41 [2022-11-16 12:14:16,719 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:14:16,720 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:14:16,722 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:14:16,722 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:14:16,728 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:14:16,729 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:14:16" (1/1) ... [2022-11-16 12:14:16,730 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25f2f9d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:16, skipping insertion in model container [2022-11-16 12:14:16,730 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:14:16" (1/1) ... [2022-11-16 12:14:16,737 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:14:16,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:14:16,986 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ed7ffa-5c00-42c9-b0e1-7649442e1180/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2022-11-16 12:14:16,995 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:14:17,011 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:14:17,042 WARN L229 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ed7ffa-5c00-42c9-b0e1-7649442e1180/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2022-11-16 12:14:17,047 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:14:17,060 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:14:17,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:17 WrapperNode [2022-11-16 12:14:17,061 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:14:17,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:14:17,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:14:17,062 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:14:17,068 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:17" (1/1) ... [2022-11-16 12:14:17,078 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:17" (1/1) ... [2022-11-16 12:14:17,116 INFO L138 Inliner]: procedures = 26, calls = 75, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 361 [2022-11-16 12:14:17,116 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:14:17,117 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:14:17,117 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:14:17,117 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:14:17,127 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:17" (1/1) ... [2022-11-16 12:14:17,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:17" (1/1) ... [2022-11-16 12:14:17,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:17" (1/1) ... [2022-11-16 12:14:17,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:17" (1/1) ... [2022-11-16 12:14:17,143 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:17" (1/1) ... [2022-11-16 12:14:17,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:17" (1/1) ... [2022-11-16 12:14:17,152 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:17" (1/1) ... [2022-11-16 12:14:17,154 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:17" (1/1) ... [2022-11-16 12:14:17,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:14:17,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:14:17,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:14:17,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:14:17,178 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:17" (1/1) ... [2022-11-16 12:14:17,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:14:17,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ed7ffa-5c00-42c9-b0e1-7649442e1180/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:17,207 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ed7ffa-5c00-42c9-b0e1-7649442e1180/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:14:17,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ed7ffa-5c00-42c9-b0e1-7649442e1180/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:14:17,250 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:14:17,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:14:17,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:14:17,251 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:14:17,251 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 12:14:17,252 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 12:14:17,252 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 12:14:17,252 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 12:14:17,252 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-16 12:14:17,252 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-16 12:14:17,253 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-16 12:14:17,253 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-16 12:14:17,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:14:17,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 12:14:17,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 12:14:17,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-16 12:14:17,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:14:17,254 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:14:17,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:14:17,256 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:14:17,390 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:14:17,392 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:14:18,210 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:14:18,882 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:14:18,882 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-16 12:14:18,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:14:18 BoogieIcfgContainer [2022-11-16 12:14:18,885 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:14:18,887 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:14:18,887 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:14:18,891 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:14:18,891 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:14:16" (1/3) ... [2022-11-16 12:14:18,892 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58df729f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:14:18, skipping insertion in model container [2022-11-16 12:14:18,892 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:14:17" (2/3) ... [2022-11-16 12:14:18,893 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58df729f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:14:18, skipping insertion in model container [2022-11-16 12:14:18,893 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:14:18" (3/3) ... [2022-11-16 12:14:18,894 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2022-11-16 12:14:18,905 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 12:14:18,917 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:14:18,917 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-11-16 12:14:18,917 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:14:19,159 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-16 12:14:19,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 272 places, 278 transitions, 588 flow [2022-11-16 12:14:19,403 INFO L130 PetriNetUnfolder]: 19/274 cut-off events. [2022-11-16 12:14:19,403 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-16 12:14:19,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 291 conditions, 274 events. 19/274 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 284 event pairs, 0 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 228. Up to 2 conditions per place. [2022-11-16 12:14:19,412 INFO L82 GeneralOperation]: Start removeDead. Operand has 272 places, 278 transitions, 588 flow [2022-11-16 12:14:19,422 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 246 places, 251 transitions, 523 flow [2022-11-16 12:14:19,442 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:14:19,453 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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;@41bc0717, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:14:19,453 INFO L358 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2022-11-16 12:14:19,479 INFO L130 PetriNetUnfolder]: 3/94 cut-off events. [2022-11-16 12:14:19,479 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-16 12:14:19,480 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:14:19,481 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:14:19,482 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2022-11-16 12:14:19,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:19,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1861543978, now seen corresponding path program 1 times [2022-11-16 12:14:19,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:19,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459404596] [2022-11-16 12:14:19,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:19,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:19,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:20,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:14:20,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:20,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459404596] [2022-11-16 12:14:20,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459404596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:14:20,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:14:20,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 12:14:20,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660000403] [2022-11-16 12:14:20,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:14:20,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 12:14:20,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:20,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 12:14:20,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-16 12:14:20,110 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 278 [2022-11-16 12:14:20,115 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 251 transitions, 523 flow. Second operand has 4 states, 4 states have (on average 203.5) internal successors, (814), 4 states have internal predecessors, (814), 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) [2022-11-16 12:14:20,115 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:14:20,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 278 [2022-11-16 12:14:20,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:14:31,448 INFO L130 PetriNetUnfolder]: 23681/32789 cut-off events. [2022-11-16 12:14:31,448 INFO L131 PetriNetUnfolder]: For 5368/5376 co-relation queries the response was YES. [2022-11-16 12:14:31,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64044 conditions, 32789 events. 23681/32789 cut-off events. For 5368/5376 co-relation queries the response was YES. Maximal size of possible extension queue 1702. Compared 197029 event pairs, 11436 based on Foata normal form. 4924/15201 useless extension candidates. Maximal degree in co-relation 31432. Up to 14260 conditions per place. [2022-11-16 12:14:31,824 INFO L137 encePairwiseOnDemand]: 245/278 looper letters, 90 selfloop transitions, 9 changer transitions 6/277 dead transitions. [2022-11-16 12:14:31,825 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 277 transitions, 794 flow [2022-11-16 12:14:31,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:14:31,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-16 12:14:31,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1149 transitions. [2022-11-16 12:14:31,850 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8266187050359712 [2022-11-16 12:14:31,851 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1149 transitions. [2022-11-16 12:14:31,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1149 transitions. [2022-11-16 12:14:31,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:14:31,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1149 transitions. [2022-11-16 12:14:31,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 229.8) internal successors, (1149), 5 states have internal predecessors, (1149), 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) [2022-11-16 12:14:31,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 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) [2022-11-16 12:14:31,877 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 278.0) internal successors, (1668), 6 states have internal predecessors, (1668), 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) [2022-11-16 12:14:31,879 INFO L175 Difference]: Start difference. First operand has 246 places, 251 transitions, 523 flow. Second operand 5 states and 1149 transitions. [2022-11-16 12:14:31,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 277 transitions, 794 flow [2022-11-16 12:14:31,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 277 transitions, 768 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-11-16 12:14:31,912 INFO L231 Difference]: Finished difference. Result has 238 places, 232 transitions, 525 flow [2022-11-16 12:14:31,915 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=278, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=525, PETRI_PLACES=238, PETRI_TRANSITIONS=232} [2022-11-16 12:14:31,923 INFO L288 CegarLoopForPetriNet]: 246 programPoint places, -8 predicate places. [2022-11-16 12:14:31,924 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 232 transitions, 525 flow [2022-11-16 12:14:31,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 203.5) internal successors, (814), 4 states have internal predecessors, (814), 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) [2022-11-16 12:14:31,925 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:14:31,925 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:14:31,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:14:31,926 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2022-11-16 12:14:31,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:14:31,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1977173289, now seen corresponding path program 1 times [2022-11-16 12:14:31,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:14:31,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784924696] [2022-11-16 12:14:31,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:31,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:14:31,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:32,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:14:32,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:14:32,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784924696] [2022-11-16 12:14:32,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784924696] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:14:32,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787298620] [2022-11-16 12:14:32,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:14:32,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:14:32,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ed7ffa-5c00-42c9-b0e1-7649442e1180/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:14:32,198 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ed7ffa-5c00-42c9-b0e1-7649442e1180/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:14:32,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25ed7ffa-5c00-42c9-b0e1-7649442e1180/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:14:32,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:14:32,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-16 12:14:32,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:14:32,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:14:32,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:14:32,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:14:32,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787298620] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:14:32,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:14:32,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-16 12:14:32,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897078974] [2022-11-16 12:14:32,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:14:32,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-16 12:14:32,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:14:32,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-16 12:14:32,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-16 12:14:32,617 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 278 [2022-11-16 12:14:32,620 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 232 transitions, 525 flow. Second operand has 12 states, 12 states have (on average 204.66666666666666) internal successors, (2456), 12 states have internal predecessors, (2456), 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) [2022-11-16 12:14:32,620 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:14:32,620 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 278 [2022-11-16 12:14:32,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand