./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.peterson.4.prop1-back-serstep.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_27404cdc-8b4f-48e5-a00a-81ebb3b6ed43/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27404cdc-8b4f-48e5-a00a-81ebb3b6ed43/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_27404cdc-8b4f-48e5-a00a-81ebb3b6ed43/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27404cdc-8b4f-48e5-a00a-81ebb3b6ed43/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.peterson.4.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27404cdc-8b4f-48e5-a00a-81ebb3b6ed43/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_27404cdc-8b4f-48e5-a00a-81ebb3b6ed43/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 d78cd891fa68505812de1aa2daf912afefe1b560cf3fa56b706a1a5e163d5abe --- 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 20:55:01,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:55:01,217 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:55:01,245 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:55:01,245 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:55:01,247 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:55:01,248 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:55:01,250 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:55:01,251 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:55:01,252 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:55:01,253 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:55:01,255 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:55:01,255 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:55:01,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:55:01,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:55:01,259 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:55:01,260 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:55:01,261 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:55:01,262 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:55:01,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:55:01,266 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:55:01,271 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:55:01,272 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:55:01,273 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:55:01,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:55:01,277 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:55:01,277 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:55:01,278 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:55:01,279 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:55:01,280 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:55:01,280 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:55:01,281 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:55:01,282 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:55:01,283 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:55:01,284 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:55:01,284 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:55:01,285 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:55:01,285 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:55:01,285 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:55:01,286 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:55:01,287 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:55:01,292 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27404cdc-8b4f-48e5-a00a-81ebb3b6ed43/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-02 20:55:01,329 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:55:01,329 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:55:01,330 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:55:01,330 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:55:01,332 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:55:01,332 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:55:01,333 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:55:01,333 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:55:01,333 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:55:01,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:55:01,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:55:01,335 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:55:01,335 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:55:01,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:55:01,335 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:55:01,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:55:01,336 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:55:01,336 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:55:01,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:55:01,336 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:55:01,337 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:55:01,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:55:01,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:55:01,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:55:01,337 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:55:01,338 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:55:01,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:55:01,340 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:55:01,340 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:55:01,340 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:55:01,340 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_27404cdc-8b4f-48e5-a00a-81ebb3b6ed43/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27404cdc-8b4f-48e5-a00a-81ebb3b6ed43/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d78cd891fa68505812de1aa2daf912afefe1b560cf3fa56b706a1a5e163d5abe [2022-11-02 20:55:01,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:55:01,636 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:55:01,641 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:55:01,643 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:55:01,644 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:55:01,646 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27404cdc-8b4f-48e5-a00a-81ebb3b6ed43/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.peterson.4.prop1-back-serstep.c [2022-11-02 20:55:01,745 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27404cdc-8b4f-48e5-a00a-81ebb3b6ed43/bin/uautomizer-Dbtcem3rbc/data/c703d0a57/b4c478a222cb459baee7f90cc0f31807/FLAG756db8434 [2022-11-02 20:55:02,404 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:55:02,405 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27404cdc-8b4f-48e5-a00a-81ebb3b6ed43/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.peterson.4.prop1-back-serstep.c [2022-11-02 20:55:02,436 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27404cdc-8b4f-48e5-a00a-81ebb3b6ed43/bin/uautomizer-Dbtcem3rbc/data/c703d0a57/b4c478a222cb459baee7f90cc0f31807/FLAG756db8434 [2022-11-02 20:55:02,578 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27404cdc-8b4f-48e5-a00a-81ebb3b6ed43/bin/uautomizer-Dbtcem3rbc/data/c703d0a57/b4c478a222cb459baee7f90cc0f31807 [2022-11-02 20:55:02,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:55:02,586 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:55:02,590 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:55:02,590 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:55:02,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:55:02,596 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:55:02" (1/1) ... [2022-11-02 20:55:02,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@478dc63a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:02, skipping insertion in model container [2022-11-02 20:55:02,598 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:55:02" (1/1) ... [2022-11-02 20:55:02,607 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:55:02,710 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:55:03,034 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_27404cdc-8b4f-48e5-a00a-81ebb3b6ed43/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.peterson.4.prop1-back-serstep.c[1014,1027] [2022-11-02 20:55:03,500 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:55:03,503 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:55:03,515 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_27404cdc-8b4f-48e5-a00a-81ebb3b6ed43/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.peterson.4.prop1-back-serstep.c[1014,1027] [2022-11-02 20:55:03,796 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:55:03,821 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:55:03,826 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:03 WrapperNode [2022-11-02 20:55:03,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:55:03,828 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:55:03,828 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:55:03,828 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:55:03,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:03" (1/1) ... [2022-11-02 20:55:03,934 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:03" (1/1) ... [2022-11-02 20:55:04,216 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2719 [2022-11-02 20:55:04,217 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:55:04,217 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:55:04,218 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:55:04,218 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:55:04,227 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:03" (1/1) ... [2022-11-02 20:55:04,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:03" (1/1) ... [2022-11-02 20:55:04,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:03" (1/1) ... [2022-11-02 20:55:04,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:03" (1/1) ... [2022-11-02 20:55:04,414 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:03" (1/1) ... [2022-11-02 20:55:04,440 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:03" (1/1) ... [2022-11-02 20:55:04,473 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:03" (1/1) ... [2022-11-02 20:55:04,485 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:03" (1/1) ... [2022-11-02 20:55:04,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:55:04,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:55:04,551 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:55:04,551 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:55:04,552 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:03" (1/1) ... [2022-11-02 20:55:04,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:55:04,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27404cdc-8b4f-48e5-a00a-81ebb3b6ed43/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:55:04,592 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27404cdc-8b4f-48e5-a00a-81ebb3b6ed43/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:55:04,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27404cdc-8b4f-48e5-a00a-81ebb3b6ed43/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:55:04,648 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:55:04,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:55:05,270 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:55:05,288 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:55:50,805 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:55:50,816 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:55:50,816 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 20:55:50,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:55:50 BoogieIcfgContainer [2022-11-02 20:55:50,819 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:55:50,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:55:50,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:55:50,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:55:50,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:55:02" (1/3) ... [2022-11-02 20:55:50,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70697108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:55:50, skipping insertion in model container [2022-11-02 20:55:50,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:55:03" (2/3) ... [2022-11-02 20:55:50,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70697108 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:55:50, skipping insertion in model container [2022-11-02 20:55:50,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:55:50" (3/3) ... [2022-11-02 20:55:50,831 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.peterson.4.prop1-back-serstep.c [2022-11-02 20:55:50,853 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:55:50,853 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:55:50,916 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:55:50,925 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;@34188ddf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:55:50,925 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:55:50,931 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 147 states have (on average 1.4965986394557824) internal successors, (220), 148 states have internal predecessors, (220), 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 20:55:50,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-02 20:55:50,939 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:55:50,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-02 20:55:50,940 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:55:50,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:55:50,947 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-02 20:55:50,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:55:50,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447255484] [2022-11-02 20:55:50,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:55:50,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:55:52,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:00,741 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 20:56:00,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:00,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447255484] [2022-11-02 20:56:00,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447255484] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:00,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:00,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:56:00,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569030375] [2022-11-02 20:56:00,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:00,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:56:00,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:00,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:56:00,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:56:00,803 INFO L87 Difference]: Start difference. First operand has 149 states, 147 states have (on average 1.4965986394557824) internal successors, (220), 148 states have internal predecessors, (220), 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 20:56:02,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 20:56:05,938 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 20:56:08,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 20:56:08,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:08,063 INFO L93 Difference]: Finished difference Result 294 states and 440 transitions. [2022-11-02 20:56:08,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:56:08,066 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 20:56:08,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:08,077 INFO L225 Difference]: With dead ends: 294 [2022-11-02 20:56:08,078 INFO L226 Difference]: Without dead ends: 147 [2022-11-02 20:56:08,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:56:08,085 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 209 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:08,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 425 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 2 Unknown, 0 Unchecked, 7.2s Time] [2022-11-02 20:56:08,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-02 20:56:08,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-11-02 20:56:08,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.4794520547945205) internal successors, (216), 146 states have internal predecessors, (216), 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 20:56:08,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 216 transitions. [2022-11-02 20:56:08,139 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 216 transitions. Word has length 5 [2022-11-02 20:56:08,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:08,139 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 216 transitions. [2022-11-02 20:56:08,140 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 20:56:08,140 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 216 transitions. [2022-11-02 20:56:08,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-02 20:56:08,146 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:08,147 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:56:08,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:56:08,148 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:56:08,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:08,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1565501055, now seen corresponding path program 1 times [2022-11-02 20:56:08,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:08,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293655119] [2022-11-02 20:56:08,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:08,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:56:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:56:15,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:56:15,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293655119] [2022-11-02 20:56:15,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293655119] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:56:15,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:56:15,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:56:15,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882698607] [2022-11-02 20:56:15,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:56:15,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:56:16,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:56:16,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:56:16,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:56:16,002 INFO L87 Difference]: Start difference. First operand 147 states and 216 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 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 20:56:16,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:56:16,104 INFO L93 Difference]: Finished difference Result 570 states and 845 transitions. [2022-11-02 20:56:16,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:56:16,105 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 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 146 [2022-11-02 20:56:16,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:56:16,114 INFO L225 Difference]: With dead ends: 570 [2022-11-02 20:56:16,115 INFO L226 Difference]: Without dead ends: 427 [2022-11-02 20:56:16,120 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 20:56:16,121 INFO L413 NwaCegarLoop]: 419 mSDtfsCounter, 280 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:56:16,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 840 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:56:16,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-11-02 20:56:16,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 285. [2022-11-02 20:56:16,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 284 states have (on average 1.4859154929577465) internal successors, (422), 284 states have internal predecessors, (422), 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 20:56:16,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 422 transitions. [2022-11-02 20:56:16,170 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 422 transitions. Word has length 146 [2022-11-02 20:56:16,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:56:16,173 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 422 transitions. [2022-11-02 20:56:16,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 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 20:56:16,174 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 422 transitions. [2022-11-02 20:56:16,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-02 20:56:16,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:56:16,187 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:56:16,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:56:16,188 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:56:16,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:56:16,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1563654013, now seen corresponding path program 1 times [2022-11-02 20:56:16,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:56:16,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495978575] [2022-11-02 20:56:16,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:56:16,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:56:50,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:57:26,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:57:26,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:57:26,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495978575] [2022-11-02 20:57:26,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495978575] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:57:26,013 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:57:26,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-11-02 20:57:26,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787895065] [2022-11-02 20:57:26,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:57:26,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 20:57:26,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:57:26,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 20:57:26,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:57:26,016 INFO L87 Difference]: Start difference. First operand 285 states and 422 transitions. Second operand has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 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 20:57:27,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 20:57:32,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 20:57:34,492 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 20:57:35,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:57:35,277 INFO L93 Difference]: Finished difference Result 665 states and 987 transitions. [2022-11-02 20:57:35,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 20:57:35,278 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 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 146 [2022-11-02 20:57:35,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:57:35,282 INFO L225 Difference]: With dead ends: 665 [2022-11-02 20:57:35,282 INFO L226 Difference]: Without dead ends: 470 [2022-11-02 20:57:35,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:57:35,284 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 1914 mSDsluCounter, 1246 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1914 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:57:35,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1914 Valid, 1422 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 275 Invalid, 2 Unknown, 0 Unchecked, 8.7s Time] [2022-11-02 20:57:35,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2022-11-02 20:57:35,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 323. [2022-11-02 20:57:35,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.484472049689441) internal successors, (478), 322 states have internal predecessors, (478), 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 20:57:35,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 478 transitions. [2022-11-02 20:57:35,310 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 478 transitions. Word has length 146 [2022-11-02 20:57:35,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:57:35,310 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 478 transitions. [2022-11-02 20:57:35,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.272727272727273) internal successors, (146), 11 states have internal predecessors, (146), 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 20:57:35,315 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 478 transitions. [2022-11-02 20:57:35,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-02 20:57:35,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:57:35,320 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:57:35,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:57:35,321 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:57:35,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:57:35,321 INFO L85 PathProgramCache]: Analyzing trace with hash -302736763, now seen corresponding path program 1 times [2022-11-02 20:57:35,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:57:35,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339499433] [2022-11-02 20:57:35,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:57:35,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:57:55,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:58:14,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:58:14,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:58:14,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339499433] [2022-11-02 20:58:14,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339499433] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:58:14,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:58:14,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-02 20:58:14,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099738860] [2022-11-02 20:58:14,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:58:14,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 20:58:14,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:58:14,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 20:58:14,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-11-02 20:58:14,726 INFO L87 Difference]: Start difference. First operand 323 states and 478 transitions. Second operand has 9 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 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 20:58:16,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 20:58:19,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 20:58:19,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:58:19,807 INFO L93 Difference]: Finished difference Result 880 states and 1306 transitions. [2022-11-02 20:58:19,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:58:19,808 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 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 146 [2022-11-02 20:58:19,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:58:19,810 INFO L225 Difference]: With dead ends: 880 [2022-11-02 20:58:19,810 INFO L226 Difference]: Without dead ends: 633 [2022-11-02 20:58:19,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:58:19,812 INFO L413 NwaCegarLoop]: 203 mSDtfsCounter, 1834 mSDsluCounter, 1340 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1834 SdHoareTripleChecker+Valid, 1543 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:58:19,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1834 Valid, 1543 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 2 Unknown, 0 Unchecked, 5.0s Time] [2022-11-02 20:58:19,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-11-02 20:58:19,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 391. [2022-11-02 20:58:19,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.4820512820512821) internal successors, (578), 390 states have internal predecessors, (578), 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 20:58:19,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 578 transitions. [2022-11-02 20:58:19,827 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 578 transitions. Word has length 146 [2022-11-02 20:58:19,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:58:19,827 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 578 transitions. [2022-11-02 20:58:19,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 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 20:58:19,828 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 578 transitions. [2022-11-02 20:58:19,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-11-02 20:58:19,829 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:58:19,829 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:58:19,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:58:19,830 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:58:19,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:58:19,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1022119431, now seen corresponding path program 1 times [2022-11-02 20:58:19,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:58:19,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649582639] [2022-11-02 20:58:19,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:58:19,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms