./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.protocols.1.prop1-back-serstep.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_f4018da4-8e3e-4a65-84f2-88f94cec79e5/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4018da4-8e3e-4a65-84f2-88f94cec79e5/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4018da4-8e3e-4a65-84f2-88f94cec79e5/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4018da4-8e3e-4a65-84f2-88f94cec79e5/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.protocols.1.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4018da4-8e3e-4a65-84f2-88f94cec79e5/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4018da4-8e3e-4a65-84f2-88f94cec79e5/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash ccd52863c81af6b9363b3cb9123948c48a201f89c1fc65f79eb7e0f4a69bd04e --- 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-5e519f3 [2022-11-02 20:06:45,396 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:06:45,398 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:06:45,445 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:06:45,446 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:06:45,452 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:06:45,456 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:06:45,461 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:06:45,464 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:06:45,473 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:06:45,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:06:45,477 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:06:45,478 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:06:45,481 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:06:45,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:06:45,486 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:06:45,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:06:45,490 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:06:45,492 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:06:45,500 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:06:45,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:06:45,505 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:06:45,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:06:45,511 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:06:45,517 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:06:45,517 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:06:45,518 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:06:45,520 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:06:45,521 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:06:45,522 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:06:45,523 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:06:45,525 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:06:45,527 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:06:45,529 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:06:45,530 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:06:45,531 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:06:45,532 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:06:45,532 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:06:45,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:06:45,534 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:06:45,535 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:06:45,536 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4018da4-8e3e-4a65-84f2-88f94cec79e5/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-02 20:06:45,587 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:06:45,590 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:06:45,591 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:06:45,591 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:06:45,593 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:06:45,593 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:06:45,594 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:06:45,594 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:06:45,594 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:06:45,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:06:45,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:06:45,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:06:45,597 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:06:45,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:06:45,597 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:06:45,598 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:06:45,598 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:06:45,598 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:06:45,598 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:06:45,599 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:06:45,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:06:45,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:06:45,600 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:06:45,600 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:06:45,600 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:06:45,600 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:06:45,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:06:45,601 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:06:45,601 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:06:45,601 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:06:45,602 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_f4018da4-8e3e-4a65-84f2-88f94cec79e5/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4018da4-8e3e-4a65-84f2-88f94cec79e5/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ccd52863c81af6b9363b3cb9123948c48a201f89c1fc65f79eb7e0f4a69bd04e [2022-11-02 20:06:45,991 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:06:46,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:06:46,051 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:06:46,053 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:06:46,054 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:06:46,056 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4018da4-8e3e-4a65-84f2-88f94cec79e5/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.protocols.1.prop1-back-serstep.c [2022-11-02 20:06:46,147 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4018da4-8e3e-4a65-84f2-88f94cec79e5/bin/uautomizer-Dbtcem3rbc/data/0f895a03a/9ef5142d4dce48d9ba331a23b4b4675a/FLAG9eb87f7ae [2022-11-02 20:06:46,960 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:06:46,966 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4018da4-8e3e-4a65-84f2-88f94cec79e5/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.protocols.1.prop1-back-serstep.c [2022-11-02 20:06:47,004 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4018da4-8e3e-4a65-84f2-88f94cec79e5/bin/uautomizer-Dbtcem3rbc/data/0f895a03a/9ef5142d4dce48d9ba331a23b4b4675a/FLAG9eb87f7ae [2022-11-02 20:06:47,157 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4018da4-8e3e-4a65-84f2-88f94cec79e5/bin/uautomizer-Dbtcem3rbc/data/0f895a03a/9ef5142d4dce48d9ba331a23b4b4675a [2022-11-02 20:06:47,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:06:47,162 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:06:47,164 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:06:47,164 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:06:47,171 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:06:47,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:06:47" (1/1) ... [2022-11-02 20:06:47,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33857c20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:06:47, skipping insertion in model container [2022-11-02 20:06:47,176 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:06:47" (1/1) ... [2022-11-02 20:06:47,185 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:06:47,270 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:06:47,630 WARN L230 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_f4018da4-8e3e-4a65-84f2-88f94cec79e5/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.protocols.1.prop1-back-serstep.c[1014,1027] [2022-11-02 20:06:48,003 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:06:48,008 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:06:48,021 WARN L230 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_f4018da4-8e3e-4a65-84f2-88f94cec79e5/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.protocols.1.prop1-back-serstep.c[1014,1027] [2022-11-02 20:06:48,138 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:06:48,154 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:06:48,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:06:48 WrapperNode [2022-11-02 20:06:48,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:06:48,156 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:06:48,157 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:06:48,157 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:06:48,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:06:48" (1/1) ... [2022-11-02 20:06:48,214 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:06:48" (1/1) ... [2022-11-02 20:06:48,420 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1235 [2022-11-02 20:06:48,420 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:06:48,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:06:48,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:06:48,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:06:48,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:06:48" (1/1) ... [2022-11-02 20:06:48,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:06:48" (1/1) ... [2022-11-02 20:06:48,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:06:48" (1/1) ... [2022-11-02 20:06:48,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:06:48" (1/1) ... [2022-11-02 20:06:48,610 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:06:48" (1/1) ... [2022-11-02 20:06:48,630 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:06:48" (1/1) ... [2022-11-02 20:06:48,646 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:06:48" (1/1) ... [2022-11-02 20:06:48,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:06:48" (1/1) ... [2022-11-02 20:06:48,695 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:06:48,698 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:06:48,698 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:06:48,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:06:48,701 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:06:48" (1/1) ... [2022-11-02 20:06:48,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:06:48,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4018da4-8e3e-4a65-84f2-88f94cec79e5/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:06:48,738 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4018da4-8e3e-4a65-84f2-88f94cec79e5/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:06:48,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4018da4-8e3e-4a65-84f2-88f94cec79e5/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:06:48,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:06:48,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:06:49,221 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:06:49,224 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:07:36,304 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:07:36,312 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:07:36,313 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 20:07:36,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:07:36 BoogieIcfgContainer [2022-11-02 20:07:36,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:07:36,318 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:07:36,318 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:07:36,323 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:07:36,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:06:47" (1/3) ... [2022-11-02 20:07:36,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d13e879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:07:36, skipping insertion in model container [2022-11-02 20:07:36,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:06:48" (2/3) ... [2022-11-02 20:07:36,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d13e879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:07:36, skipping insertion in model container [2022-11-02 20:07:36,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:07:36" (3/3) ... [2022-11-02 20:07:36,329 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.protocols.1.prop1-back-serstep.c [2022-11-02 20:07:36,352 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:07:36,352 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:07:36,429 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:07:36,441 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;@46788218, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:07:36,441 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:07:36,456 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 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) [2022-11-02 20:07:36,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-02 20:07:36,466 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:07:36,467 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-02 20:07:36,468 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:07:36,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:07:36,477 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-02 20:07:36,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:07:36,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699768367] [2022-11-02 20:07:36,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:07:36,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:07:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:07:43,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:07:43,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:07:43,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699768367] [2022-11-02 20:07:43,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699768367] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:07:43,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:07:43,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:07:43,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666171987] [2022-11-02 20:07:43,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:07:43,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:07:43,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:07:43,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:07:43,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:07:43,186 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 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) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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) [2022-11-02 20:07:46,276 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 20:07:46,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:07:46,650 INFO L93 Difference]: Finished difference Result 73 states and 108 transitions. [2022-11-02 20:07:46,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:07:46,668 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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) Word has length 5 [2022-11-02 20:07:46,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:07:46,677 INFO L225 Difference]: With dead ends: 73 [2022-11-02 20:07:46,678 INFO L226 Difference]: Without dead ends: 46 [2022-11-02 20:07:46,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:07:46,685 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 86 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:07:46,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 65 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 1 Unknown, 0 Unchecked, 3.4s Time] [2022-11-02 20:07:46,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-02 20:07:46,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 27. [2022-11-02 20:07:46,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 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) [2022-11-02 20:07:46,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2022-11-02 20:07:46,733 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 5 [2022-11-02 20:07:46,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:07:46,734 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2022-11-02 20:07:46,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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) [2022-11-02 20:07:46,735 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2022-11-02 20:07:46,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-02 20:07:46,736 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:07:46,736 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-02 20:07:46,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:07:46,737 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:07:46,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:07:46,738 INFO L85 PathProgramCache]: Analyzing trace with hash -446791645, now seen corresponding path program 1 times [2022-11-02 20:07:46,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:07:46,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946236080] [2022-11-02 20:07:46,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:07:46,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:09:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:09:29,668 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders.