./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp.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_e59ccb8d-91bb-41f0-8a47-d6b2838630a4/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59ccb8d-91bb-41f0-8a47-d6b2838630a4/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_e59ccb8d-91bb-41f0-8a47-d6b2838630a4/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59ccb8d-91bb-41f0-8a47-d6b2838630a4/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp.4.prop1-back-serstep.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59ccb8d-91bb-41f0-8a47-d6b2838630a4/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_e59ccb8d-91bb-41f0-8a47-d6b2838630a4/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 2d670a23b10b940768258d4ddc20dd604cc83ee4eb70b747a8631b04024b2735 --- 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 20:17:35,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:17:35,364 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:17:35,423 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:17:35,424 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:17:35,429 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:17:35,432 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:17:35,435 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:17:35,437 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:17:35,444 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:17:35,445 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:17:35,448 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:17:35,448 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:17:35,451 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:17:35,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:17:35,456 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:17:35,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:17:35,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:17:35,461 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:17:35,469 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:17:35,470 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:17:35,472 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:17:35,476 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:17:35,477 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:17:35,484 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:17:35,484 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:17:35,484 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:17:35,487 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:17:35,487 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:17:35,488 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:17:35,490 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:17:35,492 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:17:35,494 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:17:35,496 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:17:35,497 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:17:35,497 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:17:35,498 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:17:35,498 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:17:35,499 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:17:35,500 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:17:35,501 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:17:35,502 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59ccb8d-91bb-41f0-8a47-d6b2838630a4/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-02 20:17:35,545 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:17:35,545 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:17:35,546 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:17:35,546 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:17:35,547 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:17:35,548 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:17:35,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:17:35,549 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:17:35,549 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:17:35,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:17:35,550 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:17:35,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:17:35,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:17:35,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:17:35,551 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:17:35,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:17:35,552 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:17:35,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:17:35,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:17:35,553 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:17:35,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:17:35,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:17:35,554 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:17:35,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:17:35,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:17:35,554 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:17:35,556 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:17:35,556 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:17:35,556 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:17:35,557 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:17:35,557 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_e59ccb8d-91bb-41f0-8a47-d6b2838630a4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59ccb8d-91bb-41f0-8a47-d6b2838630a4/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d670a23b10b940768258d4ddc20dd604cc83ee4eb70b747a8631b04024b2735 [2022-11-02 20:17:35,879 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:17:35,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:17:35,915 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:17:35,917 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:17:35,917 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:17:35,919 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59ccb8d-91bb-41f0-8a47-d6b2838630a4/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp.4.prop1-back-serstep.c [2022-11-02 20:17:36,021 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59ccb8d-91bb-41f0-8a47-d6b2838630a4/bin/uautomizer-Dbtcem3rbc/data/ec5d14d6b/1281807327de47fb9fcf733879358431/FLAG213980d7d [2022-11-02 20:17:36,739 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:17:36,740 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59ccb8d-91bb-41f0-8a47-d6b2838630a4/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp.4.prop1-back-serstep.c [2022-11-02 20:17:36,761 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59ccb8d-91bb-41f0-8a47-d6b2838630a4/bin/uautomizer-Dbtcem3rbc/data/ec5d14d6b/1281807327de47fb9fcf733879358431/FLAG213980d7d [2022-11-02 20:17:36,850 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59ccb8d-91bb-41f0-8a47-d6b2838630a4/bin/uautomizer-Dbtcem3rbc/data/ec5d14d6b/1281807327de47fb9fcf733879358431 [2022-11-02 20:17:36,852 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:17:36,854 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:17:36,856 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:17:36,856 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:17:36,860 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:17:36,861 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:17:36" (1/1) ... [2022-11-02 20:17:36,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70d3dc71 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:17:36, skipping insertion in model container [2022-11-02 20:17:36,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:17:36" (1/1) ... [2022-11-02 20:17:36,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:17:36,945 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:17:37,213 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_e59ccb8d-91bb-41f0-8a47-d6b2838630a4/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp.4.prop1-back-serstep.c[1014,1027] [2022-11-02 20:17:37,832 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:17:37,857 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:17:37,872 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_e59ccb8d-91bb-41f0-8a47-d6b2838630a4/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.brp.4.prop1-back-serstep.c[1014,1027] [2022-11-02 20:17:38,105 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:17:38,118 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:17:38,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:17:38 WrapperNode [2022-11-02 20:17:38,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:17:38,122 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:17:38,122 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:17:38,122 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:17:38,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:17:38" (1/1) ... [2022-11-02 20:17:38,210 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:17:38" (1/1) ... [2022-11-02 20:17:38,709 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 3307 [2022-11-02 20:17:38,710 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:17:38,711 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:17:38,711 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:17:38,711 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:17:38,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:17:38" (1/1) ... [2022-11-02 20:17:38,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:17:38" (1/1) ... [2022-11-02 20:17:38,879 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:17:38" (1/1) ... [2022-11-02 20:17:38,880 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:17:38" (1/1) ... [2022-11-02 20:17:39,116 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:17:38" (1/1) ... [2022-11-02 20:17:39,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:17:38" (1/1) ... [2022-11-02 20:17:39,158 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:17:38" (1/1) ... [2022-11-02 20:17:39,176 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:17:38" (1/1) ... [2022-11-02 20:17:39,291 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:17:39,292 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:17:39,292 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:17:39,292 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:17:39,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:17:38" (1/1) ... [2022-11-02 20:17:39,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:17:39,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59ccb8d-91bb-41f0-8a47-d6b2838630a4/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:17:39,329 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59ccb8d-91bb-41f0-8a47-d6b2838630a4/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:17:39,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e59ccb8d-91bb-41f0-8a47-d6b2838630a4/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:17:39,395 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:17:39,396 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:17:40,073 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:17:40,075 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:19:44,678 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:19:44,687 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:19:44,688 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 20:19:44,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:19:44 BoogieIcfgContainer [2022-11-02 20:19:44,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:19:44,694 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:19:44,695 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:19:44,702 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:19:44,702 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:17:36" (1/3) ... [2022-11-02 20:19:44,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@585ec409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:19:44, skipping insertion in model container [2022-11-02 20:19:44,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:17:38" (2/3) ... [2022-11-02 20:19:44,704 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@585ec409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:19:44, skipping insertion in model container [2022-11-02 20:19:44,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:19:44" (3/3) ... [2022-11-02 20:19:44,706 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.brp.4.prop1-back-serstep.c [2022-11-02 20:19:44,732 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:19:44,733 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:19:44,814 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:19:44,820 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;@75a7974a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:19:44,820 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:19:44,826 INFO L276 IsEmpty]: Start isEmpty. Operand has 107 states, 105 states have (on average 1.4952380952380953) internal successors, (157), 106 states have internal predecessors, (157), 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 20:19:44,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-02 20:19:44,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:19:44,833 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-02 20:19:44,834 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:19:44,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:19:44,840 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-02 20:19:44,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:19:44,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116898932] [2022-11-02 20:19:44,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:19:44,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:19:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:19:56,398 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 20:19:56,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:19:56,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116898932] [2022-11-02 20:19:56,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116898932] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:19:56,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:19:56,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:19:56,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951754824] [2022-11-02 20:19:56,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:19:56,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:19:56,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:19:56,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:19:56,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:19:56,460 INFO L87 Difference]: Start difference. First operand has 107 states, 105 states have (on average 1.4952380952380953) internal successors, (157), 106 states have internal predecessors, (157), 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 20:19:58,555 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 20:19:59,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 20:20:01,885 WARN L539 Checker$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 20:20:03,925 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 20:20:03,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:03,975 INFO L93 Difference]: Finished difference Result 210 states and 314 transitions. [2022-11-02 20:20:03,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:20:03,981 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 20:20:03,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:03,992 INFO L225 Difference]: With dead ends: 210 [2022-11-02 20:20:03,992 INFO L226 Difference]: Without dead ends: 105 [2022-11-02 20:20:03,996 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 20:20:04,000 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 146 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:04,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 299 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 3 Unknown, 0 Unchecked, 7.5s Time] [2022-11-02 20:20:04,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-02 20:20:04,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-02 20:20:04,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.4711538461538463) internal successors, (153), 104 states have internal predecessors, (153), 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 20:20:04,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 153 transitions. [2022-11-02 20:20:04,084 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 153 transitions. Word has length 5 [2022-11-02 20:20:04,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:04,090 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 153 transitions. [2022-11-02 20:20:04,090 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 20:20:04,090 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 153 transitions. [2022-11-02 20:20:04,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-02 20:20:04,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:04,098 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] [2022-11-02 20:20:04,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:20:04,099 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:20:04,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:04,101 INFO L85 PathProgramCache]: Analyzing trace with hash -691414481, now seen corresponding path program 1 times [2022-11-02 20:20:04,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:04,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134766610] [2022-11-02 20:20:04,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:04,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:20:06,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:20:16,037 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 20:20:16,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:20:16,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134766610] [2022-11-02 20:20:16,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134766610] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:20:16,042 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:20:16,042 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:20:16,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359007955] [2022-11-02 20:20:16,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:20:16,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:20:16,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:20:16,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:20:16,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:20:16,049 INFO L87 Difference]: Start difference. First operand 105 states and 153 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 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 20:20:17,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 20:20:18,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:20:18,592 INFO L93 Difference]: Finished difference Result 402 states and 593 transitions. [2022-11-02 20:20:18,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:20:18,593 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 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 104 [2022-11-02 20:20:18,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:20:18,596 INFO L225 Difference]: With dead ends: 402 [2022-11-02 20:20:18,596 INFO L226 Difference]: Without dead ends: 301 [2022-11-02 20:20:18,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:20:18,599 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 196 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:20:18,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 588 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-11-02 20:20:18,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-11-02 20:20:18,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 201. [2022-11-02 20:20:18,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.48) internal successors, (296), 200 states have internal predecessors, (296), 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 20:20:18,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 296 transitions. [2022-11-02 20:20:18,621 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 296 transitions. Word has length 104 [2022-11-02 20:20:18,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:20:18,624 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 296 transitions. [2022-11-02 20:20:18,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 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 20:20:18,629 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 296 transitions. [2022-11-02 20:20:18,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-02 20:20:18,632 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:20:18,632 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] [2022-11-02 20:20:18,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:20:18,637 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:20:18,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:20:18,638 INFO L85 PathProgramCache]: Analyzing trace with hash -689567439, now seen corresponding path program 1 times [2022-11-02 20:20:18,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:20:18,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147240981] [2022-11-02 20:20:18,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:20:18,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms