./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 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76dc53d7-42f2-4d19-87c9-076e3c1afb44/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76dc53d7-42f2-4d19-87c9-076e3c1afb44/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76dc53d7-42f2-4d19-87c9-076e3c1afb44/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76dc53d7-42f2-4d19-87c9-076e3c1afb44/bin/uautomizer-TMbwUNV5ro/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_76dc53d7-42f2-4d19-87c9-076e3c1afb44/bin/uautomizer-TMbwUNV5ro/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76dc53d7-42f2-4d19-87c9-076e3c1afb44/bin/uautomizer-TMbwUNV5ro --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-8393723 [2022-11-18 19:57:16,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:57:16,326 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:57:16,360 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:57:16,364 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:57:16,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:57:16,371 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:57:16,376 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:57:16,379 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:57:16,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:57:16,384 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:57:16,386 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:57:16,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:57:16,395 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:57:16,396 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:57:16,399 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:57:16,402 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:57:16,403 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:57:16,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:57:16,411 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:57:16,413 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:57:16,414 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:57:16,415 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:57:16,416 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:57:16,420 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:57:16,420 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:57:16,420 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:57:16,421 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:57:16,422 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:57:16,423 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:57:16,423 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:57:16,424 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:57:16,425 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:57:16,425 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:57:16,426 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:57:16,427 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:57:16,427 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:57:16,428 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:57:16,428 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:57:16,429 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:57:16,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:57:16,431 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76dc53d7-42f2-4d19-87c9-076e3c1afb44/bin/uautomizer-TMbwUNV5ro/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-18 19:57:16,452 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:57:16,452 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:57:16,452 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:57:16,453 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:57:16,453 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:57:16,454 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:57:16,454 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:57:16,454 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:57:16,455 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:57:16,455 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:57:16,455 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:57:16,455 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 19:57:16,456 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:57:16,456 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:57:16,456 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:57:16,456 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 19:57:16,456 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:57:16,457 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 19:57:16,457 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-18 19:57:16,457 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:57:16,457 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:57:16,457 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:57:16,458 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 19:57:16,458 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:57:16,458 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:57:16,458 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:57:16,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:57:16,459 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:57:16,459 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:57:16,459 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 19:57:16,460 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:57:16,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:57:16,460 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 19:57:16,460 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 19:57:16,460 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 19:57:16,461 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_76dc53d7-42f2-4d19-87c9-076e3c1afb44/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76dc53d7-42f2-4d19-87c9-076e3c1afb44/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2150e0b957073117139b89f4d79d7a8523050efb20e53a1bf0b405c120dd6a7 [2022-11-18 19:57:16,707 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:57:16,735 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:57:16,738 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:57:16,740 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:57:16,742 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:57:16,744 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76dc53d7-42f2-4d19-87c9-076e3c1afb44/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2022-11-18 19:57:16,819 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76dc53d7-42f2-4d19-87c9-076e3c1afb44/bin/uautomizer-TMbwUNV5ro/data/4cd935f6f/6c57f271947f4f60ba369c68e7106227/FLAG1d842a884 [2022-11-18 19:57:17,362 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:57:17,363 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76dc53d7-42f2-4d19-87c9-076e3c1afb44/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c [2022-11-18 19:57:17,378 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76dc53d7-42f2-4d19-87c9-076e3c1afb44/bin/uautomizer-TMbwUNV5ro/data/4cd935f6f/6c57f271947f4f60ba369c68e7106227/FLAG1d842a884 [2022-11-18 19:57:17,829 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76dc53d7-42f2-4d19-87c9-076e3c1afb44/bin/uautomizer-TMbwUNV5ro/data/4cd935f6f/6c57f271947f4f60ba369c68e7106227 [2022-11-18 19:57:17,831 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:57:17,833 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:57:17,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:57:17,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:57:17,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:57:17,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:57:17" (1/1) ... [2022-11-18 19:57:17,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74e8c530 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:57:17, skipping insertion in model container [2022-11-18 19:57:17,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:57:17" (1/1) ... [2022-11-18 19:57:17,855 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:57:17,902 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:57:18,230 WARN L234 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_76dc53d7-42f2-4d19-87c9-076e3c1afb44/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2022-11-18 19:57:18,251 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:57:18,268 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:57:18,311 WARN L234 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_76dc53d7-42f2-4d19-87c9-076e3c1afb44/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt2.wvr.c[4174,4187] [2022-11-18 19:57:18,315 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:57:18,333 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:57:18,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:57:18 WrapperNode [2022-11-18 19:57:18,334 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:57:18,335 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:57:18,335 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:57:18,335 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:57:18,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:57:18" (1/1) ... [2022-11-18 19:57:18,354 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:57:18" (1/1) ... [2022-11-18 19:57:18,387 INFO L138 Inliner]: procedures = 26, calls = 75, calls flagged for inlining = 17, calls inlined = 21, statements flattened = 361 [2022-11-18 19:57:18,387 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:57:18,388 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:57:18,388 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:57:18,388 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:57:18,399 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:57:18" (1/1) ... [2022-11-18 19:57:18,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:57:18" (1/1) ... [2022-11-18 19:57:18,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:57:18" (1/1) ... [2022-11-18 19:57:18,404 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:57:18" (1/1) ... [2022-11-18 19:57:18,414 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:57:18" (1/1) ... [2022-11-18 19:57:18,419 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:57:18" (1/1) ... [2022-11-18 19:57:18,422 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:57:18" (1/1) ... [2022-11-18 19:57:18,423 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:57:18" (1/1) ... [2022-11-18 19:57:18,427 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:57:18,428 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:57:18,428 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:57:18,428 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:57:18,429 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:57:18" (1/1) ... [2022-11-18 19:57:18,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:57:18,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76dc53d7-42f2-4d19-87c9-076e3c1afb44/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:57:18,463 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76dc53d7-42f2-4d19-87c9-076e3c1afb44/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:57:18,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76dc53d7-42f2-4d19-87c9-076e3c1afb44/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:57:18,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:57:18,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 19:57:18,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 19:57:18,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 19:57:18,519 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 19:57:18,519 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 19:57:18,519 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 19:57:18,520 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 19:57:18,520 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-18 19:57:18,520 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-18 19:57:18,520 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-18 19:57:18,520 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-18 19:57:18,520 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 19:57:18,520 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 19:57:18,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 19:57:18,521 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-18 19:57:18,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:57:18,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:57:18,521 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 19:57:18,524 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 19:57:18,652 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:57:18,654 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:57:19,478 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:57:20,193 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:57:20,193 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-18 19:57:20,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:57:20 BoogieIcfgContainer [2022-11-18 19:57:20,197 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:57:20,201 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:57:20,202 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:57:20,205 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:57:20,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:57:17" (1/3) ... [2022-11-18 19:57:20,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d5fda44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:57:20, skipping insertion in model container [2022-11-18 19:57:20,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:57:18" (2/3) ... [2022-11-18 19:57:20,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d5fda44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:57:20, skipping insertion in model container [2022-11-18 19:57:20,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:57:20" (3/3) ... [2022-11-18 19:57:20,209 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt2.wvr.c [2022-11-18 19:57:20,222 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 19:57:20,233 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:57:20,233 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 30 error locations. [2022-11-18 19:57:20,233 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 19:57:20,473 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-18 19:57:20,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 272 places, 278 transitions, 588 flow [2022-11-18 19:57:20,693 INFO L130 PetriNetUnfolder]: 19/274 cut-off events. [2022-11-18 19:57:20,693 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-18 19:57:20,700 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. [2022-11-18 19:57:20,700 INFO L82 GeneralOperation]: Start removeDead. Operand has 272 places, 278 transitions, 588 flow [2022-11-18 19:57:20,708 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 246 places, 251 transitions, 523 flow [2022-11-18 19:57:20,719 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:57:20,726 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;@26361bad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:57:20,726 INFO L358 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2022-11-18 19:57:20,747 INFO L130 PetriNetUnfolder]: 3/94 cut-off events. [2022-11-18 19:57:20,747 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 19:57:20,747 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:57:20,748 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] [2022-11-18 19:57:20,749 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2022-11-18 19:57:20,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:57:20,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1861543978, now seen corresponding path program 1 times [2022-11-18 19:57:20,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:57:20,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815278027] [2022-11-18 19:57:20,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:20,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:57:20,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:21,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:57:21,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:57:21,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815278027] [2022-11-18 19:57:21,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815278027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:57:21,334 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:57:21,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:57:21,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202757033] [2022-11-18 19:57:21,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:57:21,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:57:21,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:57:21,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:57:21,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 19:57:21,393 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 278 [2022-11-18 19:57:21,401 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) [2022-11-18 19:57:21,401 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:57:21,402 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 278 [2022-11-18 19:57:21,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:57:32,699 INFO L130 PetriNetUnfolder]: 23681/32789 cut-off events. [2022-11-18 19:57:32,699 INFO L131 PetriNetUnfolder]: For 5368/5376 co-relation queries the response was YES. [2022-11-18 19:57:32,817 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. [2022-11-18 19:57:33,113 INFO L137 encePairwiseOnDemand]: 245/278 looper letters, 90 selfloop transitions, 9 changer transitions 6/277 dead transitions. [2022-11-18 19:57:33,113 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 277 transitions, 794 flow [2022-11-18 19:57:33,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 19:57:33,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-18 19:57:33,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1149 transitions. [2022-11-18 19:57:33,138 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8266187050359712 [2022-11-18 19:57:33,138 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1149 transitions. [2022-11-18 19:57:33,140 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1149 transitions. [2022-11-18 19:57:33,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:57:33,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1149 transitions. [2022-11-18 19:57:33,154 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) [2022-11-18 19:57:33,166 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) [2022-11-18 19:57:33,168 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) [2022-11-18 19:57:33,170 INFO L175 Difference]: Start difference. First operand has 246 places, 251 transitions, 523 flow. Second operand 5 states and 1149 transitions. [2022-11-18 19:57:33,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 277 transitions, 794 flow [2022-11-18 19:57:33,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 277 transitions, 768 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-11-18 19:57:33,211 INFO L231 Difference]: Finished difference. Result has 238 places, 232 transitions, 525 flow [2022-11-18 19:57:33,213 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} [2022-11-18 19:57:33,221 INFO L288 CegarLoopForPetriNet]: 246 programPoint places, -8 predicate places. [2022-11-18 19:57:33,221 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 232 transitions, 525 flow [2022-11-18 19:57:33,222 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) [2022-11-18 19:57:33,222 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:57:33,223 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] [2022-11-18 19:57:33,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 19:57:33,224 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 57 more)] === [2022-11-18 19:57:33,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:57:33,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1977173289, now seen corresponding path program 1 times [2022-11-18 19:57:33,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:57:33,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609719619] [2022-11-18 19:57:33,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:33,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:57:33,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:33,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:57:33,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:57:33,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609719619] [2022-11-18 19:57:33,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609719619] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:57:33,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920513747] [2022-11-18 19:57:33,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:57:33,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:57:33,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76dc53d7-42f2-4d19-87c9-076e3c1afb44/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:57:33,503 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76dc53d7-42f2-4d19-87c9-076e3c1afb44/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:57:33,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76dc53d7-42f2-4d19-87c9-076e3c1afb44/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 19:57:33,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:57:33,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 19:57:33,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:57:33,837 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:57:33,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:57:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:57:33,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920513747] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:57:33,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:57:33,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-11-18 19:57:33,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223409158] [2022-11-18 19:57:33,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:57:33,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 19:57:33,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:57:33,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 19:57:33,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-18 19:57:33,919 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 278 [2022-11-18 19:57:33,923 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) [2022-11-18 19:57:33,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:57:33,924 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 278 [2022-11-18 19:57:33,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand