./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_rotate32.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_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/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_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_rotate32.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/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_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/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 e8119067df6ea638c7dff7ae73c7e9b057c24dc998e1f418f029ed1f7540da97 --- 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 20:32:26,283 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:32:26,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:32:26,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:32:26,335 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:32:26,339 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:32:26,342 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:32:26,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:32:26,348 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:32:26,354 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:32:26,355 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:32:26,357 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:32:26,358 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:32:26,360 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:32:26,362 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:32:26,364 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:32:26,366 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:32:26,367 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:32:26,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:32:26,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:32:26,379 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:32:26,380 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:32:26,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:32:26,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:32:26,393 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:32:26,393 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:32:26,393 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:32:26,395 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:32:26,396 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:32:26,397 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:32:26,398 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:32:26,400 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:32:26,402 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:32:26,403 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:32:26,404 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:32:26,405 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:32:26,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:32:26,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:32:26,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:32:26,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:32:26,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:32:26,409 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-11-02 20:32:26,447 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:32:26,447 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:32:26,448 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:32:26,448 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:32:26,449 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:32:26,449 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:32:26,450 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:32:26,451 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:32:26,451 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:32:26,451 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:32:26,452 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:32:26,453 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:32:26,453 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:32:26,453 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:32:26,454 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:32:26,454 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:32:26,454 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:32:26,454 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:32:26,455 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:32:26,455 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:32:26,455 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:32:26,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:32:26,456 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:32:26,456 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:32:26,456 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:32:26,457 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:32:26,457 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:32:26,457 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:32:26,458 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:32:26,458 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:32:26,458 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_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e8119067df6ea638c7dff7ae73c7e9b057c24dc998e1f418f029ed1f7540da97 [2022-11-02 20:32:26,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:32:26,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:32:26,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:32:26,804 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:32:26,805 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:32:26,806 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_rotate32.c [2022-11-02 20:32:26,887 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/data/b28462ddf/929874c5cc4d4a22b17f789103fbfa45/FLAG4eb440bfc [2022-11-02 20:32:27,475 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:32:27,476 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_rotate32.c [2022-11-02 20:32:27,488 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/data/b28462ddf/929874c5cc4d4a22b17f789103fbfa45/FLAG4eb440bfc [2022-11-02 20:32:27,802 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/data/b28462ddf/929874c5cc4d4a22b17f789103fbfa45 [2022-11-02 20:32:27,805 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:32:27,807 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:32:27,811 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:32:27,811 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:32:27,815 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:32:27,816 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:32:27" (1/1) ... [2022-11-02 20:32:27,817 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e92275 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:27, skipping insertion in model container [2022-11-02 20:32:27,817 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:32:27" (1/1) ... [2022-11-02 20:32:27,829 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:32:27,862 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:32:28,082 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_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_rotate32.c[1107,1120] [2022-11-02 20:32:28,169 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:32:28,179 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:32:28,187 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_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_rotate32.c[1107,1120] [2022-11-02 20:32:28,223 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:32:28,235 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:32:28,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:28 WrapperNode [2022-11-02 20:32:28,236 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:32:28,237 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:32:28,237 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:32:28,237 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:32:28,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:28" (1/1) ... [2022-11-02 20:32:28,257 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:28" (1/1) ... [2022-11-02 20:32:28,293 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 168 [2022-11-02 20:32:28,293 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:32:28,294 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:32:28,294 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:32:28,294 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:32:28,304 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:28" (1/1) ... [2022-11-02 20:32:28,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:28" (1/1) ... [2022-11-02 20:32:28,308 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:28" (1/1) ... [2022-11-02 20:32:28,308 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:28" (1/1) ... [2022-11-02 20:32:28,317 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:28" (1/1) ... [2022-11-02 20:32:28,321 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:28" (1/1) ... [2022-11-02 20:32:28,323 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:28" (1/1) ... [2022-11-02 20:32:28,335 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:28" (1/1) ... [2022-11-02 20:32:28,339 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:32:28,340 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:32:28,340 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:32:28,340 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:32:28,341 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:28" (1/1) ... [2022-11-02 20:32:28,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:32:28,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:32:28,378 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:32:28,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:32:28,438 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:32:28,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:32:28,588 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:32:28,590 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:32:29,037 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:32:29,044 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:32:29,048 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 20:32:29,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:32:29 BoogieIcfgContainer [2022-11-02 20:32:29,050 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:32:29,052 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:32:29,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:32:29,060 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:32:29,065 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:32:27" (1/3) ... [2022-11-02 20:32:29,066 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30fbdc99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:32:29, skipping insertion in model container [2022-11-02 20:32:29,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:28" (2/3) ... [2022-11-02 20:32:29,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30fbdc99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:32:29, skipping insertion in model container [2022-11-02 20:32:29,067 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:32:29" (3/3) ... [2022-11-02 20:32:29,069 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_QF_BV_rotate32.c [2022-11-02 20:32:29,091 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:32:29,092 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:32:29,145 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:32:29,152 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;@7902cfa2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:32:29,152 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:32:29,157 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 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 20:32:29,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-02 20:32:29,163 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:32:29,164 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-02 20:32:29,165 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:32:29,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:32:29,171 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-02 20:32:29,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:32:29,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780915593] [2022-11-02 20:32:29,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:29,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:32:29,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:32:29,411 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:32:29,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:32:29,505 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:32:29,507 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:32:29,508 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-02 20:32:29,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:32:29,515 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-02 20:32:29,520 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-02 20:32:29,547 WARN L320 BoogieBacktranslator]: Removing null node from list of ATEs: ATE program state null [2022-11-02 20:32:29,560 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 08:32:29 BoogieIcfgContainer [2022-11-02 20:32:29,560 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-02 20:32:29,563 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-02 20:32:29,563 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-02 20:32:29,563 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-02 20:32:29,564 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:32:29" (3/4) ... [2022-11-02 20:32:29,567 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-02 20:32:29,568 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-02 20:32:29,569 INFO L158 Benchmark]: Toolchain (without parser) took 1761.21ms. Allocated memory is still 111.1MB. Free memory was 75.5MB in the beginning and 82.6MB in the end (delta: -7.1MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:32:29,571 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 111.1MB. Free memory was 83.3MB in the beginning and 83.3MB in the end (delta: 28.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:32:29,572 INFO L158 Benchmark]: CACSL2BoogieTranslator took 425.35ms. Allocated memory is still 111.1MB. Free memory was 75.3MB in the beginning and 82.6MB in the end (delta: -7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-02 20:32:29,573 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.73ms. Allocated memory is still 111.1MB. Free memory was 82.6MB in the beginning and 79.6MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-02 20:32:29,574 INFO L158 Benchmark]: Boogie Preprocessor took 45.32ms. Allocated memory is still 111.1MB. Free memory was 79.6MB in the beginning and 77.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-02 20:32:29,580 INFO L158 Benchmark]: RCFGBuilder took 710.44ms. Allocated memory is still 111.1MB. Free memory was 77.8MB in the beginning and 53.2MB in the end (delta: 24.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2022-11-02 20:32:29,581 INFO L158 Benchmark]: TraceAbstraction took 507.74ms. Allocated memory is still 111.1MB. Free memory was 52.7MB in the beginning and 83.3MB in the end (delta: -30.6MB). Peak memory consumption was 25.0MB. Max. memory is 16.1GB. [2022-11-02 20:32:29,582 INFO L158 Benchmark]: Witness Printer took 5.05ms. Allocated memory is still 111.1MB. Free memory was 83.3MB in the beginning and 82.6MB in the end (delta: 634.6kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:32:29,592 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 111.1MB. Free memory was 83.3MB in the beginning and 83.3MB in the end (delta: 28.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 425.35ms. Allocated memory is still 111.1MB. Free memory was 75.3MB in the beginning and 82.6MB in the end (delta: -7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.73ms. Allocated memory is still 111.1MB. Free memory was 82.6MB in the beginning and 79.6MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 45.32ms. Allocated memory is still 111.1MB. Free memory was 79.6MB in the beginning and 77.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 710.44ms. Allocated memory is still 111.1MB. Free memory was 77.8MB in the beginning and 53.2MB in the end (delta: 24.5MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 507.74ms. Allocated memory is still 111.1MB. Free memory was 52.7MB in the beginning and 83.3MB in the end (delta: -30.6MB). Peak memory consumption was 25.0MB. Max. memory is 16.1GB. * Witness Printer took 5.05ms. Allocated memory is still 111.1MB. Free memory was 83.3MB in the beginning and 82.6MB in the end (delta: 634.6kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 20]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseComplement at line 84, overapproximation of bitwiseAnd at line 89. Possible FailurePath: [L25] const SORT_1 mask_SORT_1 = (SORT_1)-1 >> (sizeof(SORT_1) * 8 - 5); [L26] const SORT_1 msb_SORT_1 = (SORT_1)1 << (5 - 1); [L28] const SORT_3 mask_SORT_3 = (SORT_3)-1 >> (sizeof(SORT_3) * 8 - 1); [L29] const SORT_3 msb_SORT_3 = (SORT_3)1 << (1 - 1); [L31] const SORT_5 mask_SORT_5 = (SORT_5)-1 >> (sizeof(SORT_5) * 8 - 32); [L32] const SORT_5 msb_SORT_5 = (SORT_5)1 << (32 - 1); [L34] const SORT_22 mask_SORT_22 = (SORT_22)-1 >> (sizeof(SORT_22) * 8 - 31); [L35] const SORT_22 msb_SORT_22 = (SORT_22)1 << (31 - 1); [L37] const SORT_29 mask_SORT_29 = (SORT_29)-1 >> (sizeof(SORT_29) * 8 - 30); [L38] const SORT_29 msb_SORT_29 = (SORT_29)1 << (30 - 1); [L40] const SORT_31 mask_SORT_31 = (SORT_31)-1 >> (sizeof(SORT_31) * 8 - 2); [L41] const SORT_31 msb_SORT_31 = (SORT_31)1 << (2 - 1); [L43] const SORT_37 mask_SORT_37 = (SORT_37)-1 >> (sizeof(SORT_37) * 8 - 28); [L44] const SORT_37 msb_SORT_37 = (SORT_37)1 << (28 - 1); [L46] const SORT_39 mask_SORT_39 = (SORT_39)-1 >> (sizeof(SORT_39) * 8 - 4); [L47] const SORT_39 msb_SORT_39 = (SORT_39)1 << (4 - 1); [L49] const SORT_45 mask_SORT_45 = (SORT_45)-1 >> (sizeof(SORT_45) * 8 - 24); [L50] const SORT_45 msb_SORT_45 = (SORT_45)1 << (24 - 1); [L52] const SORT_47 mask_SORT_47 = (SORT_47)-1 >> (sizeof(SORT_47) * 8 - 8); [L53] const SORT_47 msb_SORT_47 = (SORT_47)1 << (8 - 1); [L55] const SORT_53 mask_SORT_53 = (SORT_53)-1 >> (sizeof(SORT_53) * 8 - 16); [L56] const SORT_53 msb_SORT_53 = (SORT_53)1 << (16 - 1); [L58] const SORT_5 var_7 = 0; [L59] const SORT_5 var_10 = 2863311530; [L60] const SORT_3 var_15 = 1; [L62] SORT_1 input_2; [L63] SORT_3 input_4; [L64] SORT_5 input_6; [L66] SORT_5 state_8 = __VERIFIER_nondet_uint() & mask_SORT_5; [L67] SORT_5 state_19 = __VERIFIER_nondet_uint() & mask_SORT_5; [L69] SORT_5 init_9_arg_1 = var_7; [L70] state_8 = init_9_arg_1 [L71] SORT_5 init_20_arg_1 = var_7; [L72] state_19 = init_20_arg_1 VAL [init_20_arg_1=0, init_9_arg_1=0, mask_SORT_1=31, mask_SORT_22=4294967295, mask_SORT_29=4294967295, mask_SORT_3=1, mask_SORT_31=3, mask_SORT_37=4294967295, mask_SORT_39=15, mask_SORT_45=4294967295, mask_SORT_47=255, mask_SORT_5=4294967295, mask_SORT_53=65535, msb_SORT_1=16, msb_SORT_22=1073741824, msb_SORT_29=536870912, msb_SORT_3=1, msb_SORT_31=2, msb_SORT_37=134217728, msb_SORT_39=8, msb_SORT_45=8388608, msb_SORT_47=128, msb_SORT_5=2147483648, msb_SORT_53=32768, state_19=0, state_8=0, var_10=2863311530, var_15=1, var_7=0] [L75] input_2 = __VERIFIER_nondet_uchar() [L76] input_4 = __VERIFIER_nondet_uchar() [L77] input_6 = __VERIFIER_nondet_uint() [L80] SORT_5 var_11_arg_0 = state_8; [L81] SORT_5 var_11_arg_1 = var_10; [L82] SORT_3 var_11 = var_11_arg_0 == var_11_arg_1; [L83] SORT_3 var_12_arg_0 = var_11; [L84] SORT_3 var_12 = ~var_12_arg_0; [L85] SORT_3 var_16_arg_0 = var_12; [L86] SORT_3 var_16 = ~var_16_arg_0; [L87] SORT_3 var_17_arg_0 = var_15; [L88] SORT_3 var_17_arg_1 = var_16; [L89] SORT_3 var_17 = var_17_arg_0 & var_17_arg_1; [L90] var_17 = var_17 & mask_SORT_3 [L91] SORT_3 bad_18_arg_0 = var_17; [L92] CALL __VERIFIER_assert(!(bad_18_arg_0)) [L20] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L20] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-02 20:32:29,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/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_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_rotate32.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/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 e8119067df6ea638c7dff7ae73c7e9b057c24dc998e1f418f029ed1f7540da97 --- 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 20:32:32,145 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:32:32,149 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:32:32,194 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:32:32,195 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:32:32,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:32:32,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:32:32,208 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:32:32,213 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:32:32,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:32:32,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:32:32,222 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:32:32,222 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:32:32,225 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:32:32,226 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:32:32,228 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:32:32,230 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:32:32,231 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:32:32,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:32:32,241 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:32:32,243 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:32:32,244 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:32:32,247 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:32:32,249 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:32:32,258 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:32:32,258 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:32:32,258 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:32:32,260 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:32:32,261 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:32:32,262 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:32:32,262 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:32:32,263 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:32:32,265 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:32:32,266 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:32:32,267 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:32:32,268 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:32:32,269 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:32:32,269 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:32:32,269 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:32:32,271 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:32:32,272 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:32:32,273 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2022-11-02 20:32:32,325 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:32:32,325 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:32:32,327 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:32:32,327 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:32:32,329 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:32:32,329 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:32:32,331 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:32:32,331 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:32:32,331 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:32:32,332 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:32:32,333 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:32:32,333 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:32:32,333 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:32:32,334 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:32:32,334 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-02 20:32:32,335 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-02 20:32:32,335 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-02 20:32:32,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:32:32,335 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:32:32,336 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:32:32,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:32:32,336 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:32:32,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:32:32,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:32:32,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:32:32,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:32:32,338 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:32:32,338 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-02 20:32:32,338 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-02 20:32:32,338 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:32:32,339 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:32:32,339 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:32:32,339 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-02 20:32:32,339 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e8119067df6ea638c7dff7ae73c7e9b057c24dc998e1f418f029ed1f7540da97 [2022-11-02 20:32:32,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:32:32,865 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:32:32,869 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:32:32,871 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:32:32,874 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:32:32,876 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_rotate32.c [2022-11-02 20:32:32,953 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/data/035bd6e4f/df11af9078e044d08fc95899bfceabe1/FLAG35fca2e42 [2022-11-02 20:32:33,519 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:32:33,520 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_rotate32.c [2022-11-02 20:32:33,528 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/data/035bd6e4f/df11af9078e044d08fc95899bfceabe1/FLAG35fca2e42 [2022-11-02 20:32:33,824 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/data/035bd6e4f/df11af9078e044d08fc95899bfceabe1 [2022-11-02 20:32:33,827 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:32:33,828 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:32:33,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:32:33,831 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:32:33,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:32:33,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:32:33" (1/1) ... [2022-11-02 20:32:33,837 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6820244a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:33, skipping insertion in model container [2022-11-02 20:32:33,838 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:32:33" (1/1) ... [2022-11-02 20:32:33,846 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:32:33,866 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:32:33,995 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_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_rotate32.c[1107,1120] [2022-11-02 20:32:34,139 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:32:34,143 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:32:34,153 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_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/sv-benchmarks/c/hardware-verification-bv/btor2c-lazyMod.vis_QF_BV_rotate32.c[1107,1120] [2022-11-02 20:32:34,188 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:32:34,201 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:32:34,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:34 WrapperNode [2022-11-02 20:32:34,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:32:34,203 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:32:34,203 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:32:34,203 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:32:34,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:34" (1/1) ... [2022-11-02 20:32:34,219 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:34" (1/1) ... [2022-11-02 20:32:34,246 INFO L138 Inliner]: procedures = 11, calls = 3, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 168 [2022-11-02 20:32:34,247 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:32:34,247 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:32:34,248 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:32:34,248 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:32:34,260 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:34" (1/1) ... [2022-11-02 20:32:34,261 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:34" (1/1) ... [2022-11-02 20:32:34,271 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:34" (1/1) ... [2022-11-02 20:32:34,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:34" (1/1) ... [2022-11-02 20:32:34,278 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:34" (1/1) ... [2022-11-02 20:32:34,298 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:34" (1/1) ... [2022-11-02 20:32:34,299 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:34" (1/1) ... [2022-11-02 20:32:34,300 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:34" (1/1) ... [2022-11-02 20:32:34,303 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:32:34,304 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:32:34,304 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:32:34,304 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:32:34,305 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:34" (1/1) ... [2022-11-02 20:32:34,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:32:34,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:32:34,346 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:32:34,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:32:34,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:32:34,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:32:34,477 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:32:34,479 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:32:34,942 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:32:34,950 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:32:34,950 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 20:32:34,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:32:34 BoogieIcfgContainer [2022-11-02 20:32:34,953 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:32:34,956 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:32:34,956 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:32:34,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:32:34,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:32:33" (1/3) ... [2022-11-02 20:32:34,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f95642a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:32:34, skipping insertion in model container [2022-11-02 20:32:34,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:32:34" (2/3) ... [2022-11-02 20:32:34,961 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f95642a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:32:34, skipping insertion in model container [2022-11-02 20:32:34,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:32:34" (3/3) ... [2022-11-02 20:32:34,963 INFO L112 eAbstractionObserver]: Analyzing ICFG btor2c-lazyMod.vis_QF_BV_rotate32.c [2022-11-02 20:32:34,984 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:32:34,985 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:32:35,067 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:32:35,076 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;@36108507, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:32:35,077 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:32:35,081 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 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 20:32:35,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-02 20:32:35,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:32:35,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-02 20:32:35,092 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:32:35,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:32:35,099 INFO L85 PathProgramCache]: Analyzing trace with hash 28698761, now seen corresponding path program 1 times [2022-11-02 20:32:35,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:32:35,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1265825874] [2022-11-02 20:32:35,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:35,113 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:32:35,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:32:35,118 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:32:35,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-02 20:32:35,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:32:35,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-02 20:32:35,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:32:35,501 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 20:32:35,503 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:32:35,504 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:32:35,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1265825874] [2022-11-02 20:32:35,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1265825874] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:32:35,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:32:35,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:32:35,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51185520] [2022-11-02 20:32:35,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:32:35,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:32:35,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:32:35,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:32:35,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:32:35,555 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 20 states have internal predecessors, (28), 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 20:32:35,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:32:35,617 INFO L93 Difference]: Finished difference Result 50 states and 75 transitions. [2022-11-02 20:32:35,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:32:35,620 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 20:32:35,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:32:35,628 INFO L225 Difference]: With dead ends: 50 [2022-11-02 20:32:35,628 INFO L226 Difference]: Without dead ends: 31 [2022-11-02 20:32:35,631 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 20:32:35,635 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 34 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:32:35,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 57 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:32:35,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-02 20:32:35,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 19. [2022-11-02 20:32:35,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 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 20:32:35,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-11-02 20:32:35,669 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 5 [2022-11-02 20:32:35,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:32:35,670 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-11-02 20:32:35,670 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 20:32:35,670 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-11-02 20:32:35,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:32:35,671 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:32:35,671 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:32:35,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:32:35,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:32:35,883 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:32:35,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:32:35,884 INFO L85 PathProgramCache]: Analyzing trace with hash -22920079, now seen corresponding path program 1 times [2022-11-02 20:32:35,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:32:35,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [225565756] [2022-11-02 20:32:35,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:35,885 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:32:35,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:32:35,887 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:32:35,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-02 20:32:36,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:32:36,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-02 20:32:36,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:32:37,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:32:37,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:32:39,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:32:39,023 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:32:39,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [225565756] [2022-11-02 20:32:39,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [225565756] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:32:39,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:32:39,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-02 20:32:39,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914862622] [2022-11-02 20:32:39,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:32:39,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:32:39,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:32:39,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:32:39,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:32:39,039 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:32:39,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:32:39,370 INFO L93 Difference]: Finished difference Result 86 states and 115 transitions. [2022-11-02 20:32:39,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:32:39,371 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 18 [2022-11-02 20:32:39,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:32:39,373 INFO L225 Difference]: With dead ends: 86 [2022-11-02 20:32:39,374 INFO L226 Difference]: Without dead ends: 84 [2022-11-02 20:32:39,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:32:39,376 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 148 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 937 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 277 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:32:39,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 937 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 277 Unchecked, 0.0s Time] [2022-11-02 20:32:39,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-02 20:32:39,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 32. [2022-11-02 20:32:39,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 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 20:32:39,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-11-02 20:32:39,387 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-11-02 20:32:39,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:32:39,388 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-11-02 20:32:39,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:32:39,389 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-11-02 20:32:39,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:32:39,390 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:32:39,391 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:32:39,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:32:39,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:32:39,603 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:32:39,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:32:39,604 INFO L85 PathProgramCache]: Analyzing trace with hash -21073037, now seen corresponding path program 1 times [2022-11-02 20:32:39,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:32:39,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1576540060] [2022-11-02 20:32:39,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:39,605 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:32:39,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:32:39,606 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:32:39,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-02 20:32:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:32:39,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-02 20:32:39,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:32:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:32:40,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:32:42,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:32:42,363 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:32:42,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1576540060] [2022-11-02 20:32:42,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1576540060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:32:42,364 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:32:42,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-02 20:32:42,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609469731] [2022-11-02 20:32:42,364 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:32:42,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:32:42,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:32:42,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:32:42,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:32:42,367 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:32:42,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:32:42,676 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2022-11-02 20:32:42,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:32:42,677 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 18 [2022-11-02 20:32:42,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:32:42,682 INFO L225 Difference]: With dead ends: 87 [2022-11-02 20:32:42,682 INFO L226 Difference]: Without dead ends: 85 [2022-11-02 20:32:42,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:32:42,686 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 146 mSDsluCounter, 863 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:32:42,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 923 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 208 Unchecked, 0.0s Time] [2022-11-02 20:32:42,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-02 20:32:42,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 32. [2022-11-02 20:32:42,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 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 20:32:42,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-11-02 20:32:42,696 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-11-02 20:32:42,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:32:42,697 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-11-02 20:32:42,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:32:42,697 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-11-02 20:32:42,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:32:42,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:32:42,698 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:32:42,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:32:42,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:32:42,911 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:32:42,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:32:42,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1752087283, now seen corresponding path program 1 times [2022-11-02 20:32:42,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:32:42,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167976511] [2022-11-02 20:32:42,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:42,913 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:32:42,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:32:42,916 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:32:42,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-02 20:32:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:32:43,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-02 20:32:43,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:32:43,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:32:43,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:32:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:32:45,356 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:32:45,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1167976511] [2022-11-02 20:32:45,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1167976511] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:32:45,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:32:45,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-02 20:32:45,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30155109] [2022-11-02 20:32:45,358 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:32:45,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:32:45,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:32:45,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:32:45,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:32:45,364 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:32:45,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:32:45,604 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2022-11-02 20:32:45,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:32:45,605 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 18 [2022-11-02 20:32:45,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:32:45,606 INFO L225 Difference]: With dead ends: 87 [2022-11-02 20:32:45,606 INFO L226 Difference]: Without dead ends: 85 [2022-11-02 20:32:45,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:32:45,608 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 116 mSDsluCounter, 1041 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 192 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:32:45,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 1101 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 192 Unchecked, 0.0s Time] [2022-11-02 20:32:45,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-02 20:32:45,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 34. [2022-11-02 20:32:45,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 states have internal predecessors, (45), 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 20:32:45,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2022-11-02 20:32:45,615 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 18 [2022-11-02 20:32:45,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:32:45,616 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2022-11-02 20:32:45,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:32:45,616 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2022-11-02 20:32:45,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:32:45,617 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:32:45,617 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:32:45,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:32:45,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:32:45,831 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:32:45,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:32:45,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1753934325, now seen corresponding path program 1 times [2022-11-02 20:32:45,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:32:45,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905183368] [2022-11-02 20:32:45,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:45,833 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:32:45,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:32:45,834 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:32:45,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-02 20:32:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:32:45,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-02 20:32:45,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:32:46,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:32:46,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:32:52,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:32:52,464 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:32:52,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905183368] [2022-11-02 20:32:52,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1905183368] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:32:52,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:32:52,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-02 20:32:52,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813514112] [2022-11-02 20:32:52,465 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:32:52,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:32:52,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:32:52,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:32:52,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:32:52,468 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:32:57,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:32:57,196 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2022-11-02 20:32:57,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:32:57,197 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 18 [2022-11-02 20:32:57,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:32:57,198 INFO L225 Difference]: With dead ends: 87 [2022-11-02 20:32:57,198 INFO L226 Difference]: Without dead ends: 85 [2022-11-02 20:32:57,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:32:57,199 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 102 mSDsluCounter, 988 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 256 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:32:57,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 1048 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 256 Unchecked, 0.0s Time] [2022-11-02 20:32:57,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-02 20:32:57,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 32. [2022-11-02 20:32:57,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 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 20:32:57,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-11-02 20:32:57,206 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-11-02 20:32:57,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:32:57,207 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-11-02 20:32:57,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:32:57,207 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-11-02 20:32:57,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:32:57,208 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:32:57,208 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:32:57,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:32:57,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:32:57,427 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:32:57,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:32:57,427 INFO L85 PathProgramCache]: Analyzing trace with hash 657138291, now seen corresponding path program 1 times [2022-11-02 20:32:57,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:32:57,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1213798547] [2022-11-02 20:32:57,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:32:57,428 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:32:57,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:32:57,429 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:32:57,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-02 20:32:57,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:32:57,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-02 20:32:57,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:32:58,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:32:58,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:32:59,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:32:59,747 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:32:59,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1213798547] [2022-11-02 20:32:59,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1213798547] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:32:59,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:32:59,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-02 20:32:59,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473312070] [2022-11-02 20:32:59,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:32:59,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:32:59,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:32:59,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:32:59,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:32:59,750 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:32:59,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:32:59,962 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2022-11-02 20:32:59,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:32:59,967 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 18 [2022-11-02 20:32:59,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:32:59,968 INFO L225 Difference]: With dead ends: 87 [2022-11-02 20:32:59,968 INFO L226 Difference]: Without dead ends: 85 [2022-11-02 20:32:59,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:32:59,975 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 127 mSDsluCounter, 839 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:32:59,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 899 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 178 Unchecked, 0.0s Time] [2022-11-02 20:32:59,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-02 20:32:59,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 36. [2022-11-02 20:32:59,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 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 20:32:59,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2022-11-02 20:32:59,990 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 18 [2022-11-02 20:32:59,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:32:59,991 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2022-11-02 20:32:59,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:32:59,995 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2022-11-02 20:32:59,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:32:59,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:32:59,997 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:00,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:33:00,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:33:00,210 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:00,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:00,211 INFO L85 PathProgramCache]: Analyzing trace with hash 658985333, now seen corresponding path program 1 times [2022-11-02 20:33:00,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:33:00,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [548011872] [2022-11-02 20:33:00,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:00,211 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:33:00,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:33:00,213 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:33:00,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-02 20:33:00,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:00,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-02 20:33:00,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:33:03,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:03,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:33:12,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:12,081 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:33:12,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [548011872] [2022-11-02 20:33:12,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [548011872] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:33:12,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:33:12,082 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-02 20:33:12,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592251576] [2022-11-02 20:33:12,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:33:12,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:33:12,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:33:12,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:33:12,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=689, Unknown=1, NotChecked=0, Total=756 [2022-11-02 20:33:12,084 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:33:15,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:33:15,437 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2022-11-02 20:33:15,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:33:15,437 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 18 [2022-11-02 20:33:15,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:33:15,438 INFO L225 Difference]: With dead ends: 87 [2022-11-02 20:33:15,438 INFO L226 Difference]: Without dead ends: 85 [2022-11-02 20:33:15,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=85, Invalid=844, Unknown=1, NotChecked=0, Total=930 [2022-11-02 20:33:15,439 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 135 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 283 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:33:15,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 1007 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 283 Unchecked, 0.0s Time] [2022-11-02 20:33:15,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-02 20:33:15,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 34. [2022-11-02 20:33:15,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 states have internal predecessors, (45), 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 20:33:15,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2022-11-02 20:33:15,445 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 18 [2022-11-02 20:33:15,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:33:15,446 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2022-11-02 20:33:15,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:33:15,446 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2022-11-02 20:33:15,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:33:15,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:15,447 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:15,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:33:15,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:33:15,655 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:15,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:15,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1862821643, now seen corresponding path program 1 times [2022-11-02 20:33:15,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:33:15,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771157500] [2022-11-02 20:33:15,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:15,656 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:33:15,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:33:15,657 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:33:15,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-02 20:33:15,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:15,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-02 20:33:15,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:33:16,284 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:16,285 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:33:17,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:17,794 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:33:17,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771157500] [2022-11-02 20:33:17,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771157500] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:33:17,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:33:17,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-02 20:33:17,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439196561] [2022-11-02 20:33:17,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:33:17,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:33:17,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:33:17,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:33:17,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:33:17,797 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:33:18,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:33:18,006 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2022-11-02 20:33:18,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:33:18,007 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 18 [2022-11-02 20:33:18,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:33:18,008 INFO L225 Difference]: With dead ends: 87 [2022-11-02 20:33:18,008 INFO L226 Difference]: Without dead ends: 85 [2022-11-02 20:33:18,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:33:18,009 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 136 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:33:18,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 977 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 295 Unchecked, 0.0s Time] [2022-11-02 20:33:18,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-02 20:33:18,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 36. [2022-11-02 20:33:18,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 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 20:33:18,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2022-11-02 20:33:18,016 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 18 [2022-11-02 20:33:18,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:33:18,017 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2022-11-02 20:33:18,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:33:18,017 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2022-11-02 20:33:18,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:33:18,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:18,018 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:18,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:33:18,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:33:18,227 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:18,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:18,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1860974601, now seen corresponding path program 1 times [2022-11-02 20:33:18,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:33:18,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [135737211] [2022-11-02 20:33:18,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:18,228 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:33:18,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:33:18,229 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:33:18,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-02 20:33:18,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:18,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-02 20:33:18,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:33:19,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:19,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:33:20,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:20,904 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:33:20,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [135737211] [2022-11-02 20:33:20,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [135737211] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:33:20,905 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:33:20,905 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-02 20:33:20,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152003936] [2022-11-02 20:33:20,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:33:20,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:33:20,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:33:20,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:33:20,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:33:20,907 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:33:21,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:33:21,436 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2022-11-02 20:33:21,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:33:21,436 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 18 [2022-11-02 20:33:21,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:33:21,437 INFO L225 Difference]: With dead ends: 87 [2022-11-02 20:33:21,437 INFO L226 Difference]: Without dead ends: 85 [2022-11-02 20:33:21,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:33:21,438 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 138 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 353 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:33:21,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 923 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 353 Unchecked, 0.0s Time] [2022-11-02 20:33:21,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-02 20:33:21,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 32. [2022-11-02 20:33:21,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 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 20:33:21,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-11-02 20:33:21,447 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-11-02 20:33:21,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:33:21,448 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-11-02 20:33:21,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:33:21,448 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-11-02 20:33:21,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:33:21,449 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:21,449 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:21,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2022-11-02 20:33:21,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:33:21,661 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:21,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:21,662 INFO L85 PathProgramCache]: Analyzing trace with hash -723984657, now seen corresponding path program 1 times [2022-11-02 20:33:21,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:33:21,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [115812548] [2022-11-02 20:33:21,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:21,663 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:33:21,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:33:21,664 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:33:21,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-02 20:33:21,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:21,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 55 conjunts are in the unsatisfiable core [2022-11-02 20:33:21,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:33:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:22,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:33:24,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:24,170 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:33:24,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [115812548] [2022-11-02 20:33:24,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [115812548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:33:24,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:33:24,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-02 20:33:24,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954862670] [2022-11-02 20:33:24,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:33:24,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:33:24,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:33:24,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:33:24,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:33:24,172 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:33:24,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:33:24,435 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2022-11-02 20:33:24,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:33:24,436 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 18 [2022-11-02 20:33:24,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:33:24,437 INFO L225 Difference]: With dead ends: 87 [2022-11-02 20:33:24,437 INFO L226 Difference]: Without dead ends: 85 [2022-11-02 20:33:24,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:33:24,438 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 102 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:33:24,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 1116 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 226 Unchecked, 0.0s Time] [2022-11-02 20:33:24,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-02 20:33:24,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 38. [2022-11-02 20:33:24,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 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 20:33:24,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2022-11-02 20:33:24,446 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 18 [2022-11-02 20:33:24,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:33:24,446 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2022-11-02 20:33:24,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:33:24,447 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2022-11-02 20:33:24,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:33:24,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:24,447 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:24,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-02 20:33:24,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:33:24,660 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:24,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:24,661 INFO L85 PathProgramCache]: Analyzing trace with hash -722137615, now seen corresponding path program 1 times [2022-11-02 20:33:24,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:33:24,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [796972705] [2022-11-02 20:33:24,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:24,662 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:33:24,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:33:24,663 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:33:24,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-02 20:33:24,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:24,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-02 20:33:24,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:33:26,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:26,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:33:29,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:29,279 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:33:29,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [796972705] [2022-11-02 20:33:29,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [796972705] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:33:29,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:33:29,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-02 20:33:29,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670978301] [2022-11-02 20:33:29,280 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:33:29,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:33:29,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:33:29,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:33:29,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:33:29,282 INFO L87 Difference]: Start difference. First operand 38 states and 51 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:33:29,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:33:29,657 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2022-11-02 20:33:29,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:33:29,658 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 18 [2022-11-02 20:33:29,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:33:29,658 INFO L225 Difference]: With dead ends: 87 [2022-11-02 20:33:29,658 INFO L226 Difference]: Without dead ends: 85 [2022-11-02 20:33:29,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:33:29,660 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 133 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:33:29,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 976 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 168 Unchecked, 0.0s Time] [2022-11-02 20:33:29,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-02 20:33:29,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 36. [2022-11-02 20:33:29,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 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 20:33:29,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2022-11-02 20:33:29,665 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 18 [2022-11-02 20:33:29,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:33:29,666 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2022-11-02 20:33:29,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:33:29,666 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2022-11-02 20:33:29,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:33:29,667 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:29,667 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:29,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-11-02 20:33:29,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:33:29,868 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:29,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:29,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1051022705, now seen corresponding path program 1 times [2022-11-02 20:33:29,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:33:29,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [6224105] [2022-11-02 20:33:29,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:29,868 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:33:29,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:33:29,869 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:33:29,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-02 20:33:29,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:29,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-02 20:33:29,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:33:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:30,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:33:32,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:32,745 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:33:32,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [6224105] [2022-11-02 20:33:32,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [6224105] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:33:32,745 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:33:32,745 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-02 20:33:32,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444933917] [2022-11-02 20:33:32,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:33:32,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:33:32,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:33:32,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:33:32,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:33:32,747 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:33:32,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:33:32,994 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2022-11-02 20:33:32,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:33:32,994 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 18 [2022-11-02 20:33:32,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:33:32,995 INFO L225 Difference]: With dead ends: 87 [2022-11-02 20:33:32,995 INFO L226 Difference]: Without dead ends: 85 [2022-11-02 20:33:32,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:33:32,997 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 114 mSDsluCounter, 1046 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1106 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 308 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:33:32,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1106 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 308 Unchecked, 0.0s Time] [2022-11-02 20:33:32,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-02 20:33:33,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 38. [2022-11-02 20:33:33,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 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 20:33:33,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2022-11-02 20:33:33,003 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 18 [2022-11-02 20:33:33,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:33:33,004 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2022-11-02 20:33:33,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:33:33,004 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2022-11-02 20:33:33,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:33:33,005 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:33,005 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:33,017 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-11-02 20:33:33,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:33:33,215 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:33,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:33,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1052869747, now seen corresponding path program 1 times [2022-11-02 20:33:33,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:33:33,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1766663799] [2022-11-02 20:33:33,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:33,216 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:33:33,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:33:33,217 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:33:33,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-02 20:33:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:33,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-02 20:33:33,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:33:34,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:34,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:33:35,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:35,999 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:33:35,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1766663799] [2022-11-02 20:33:36,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1766663799] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:33:36,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:33:36,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-02 20:33:36,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053603671] [2022-11-02 20:33:36,000 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:33:36,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:33:36,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:33:36,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:33:36,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:33:36,002 INFO L87 Difference]: Start difference. First operand 38 states and 51 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:33:36,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:33:36,370 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2022-11-02 20:33:36,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:33:36,371 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 18 [2022-11-02 20:33:36,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:33:36,372 INFO L225 Difference]: With dead ends: 87 [2022-11-02 20:33:36,372 INFO L226 Difference]: Without dead ends: 85 [2022-11-02 20:33:36,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:33:36,376 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 118 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 929 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 223 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:33:36,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 929 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 223 Unchecked, 0.0s Time] [2022-11-02 20:33:36,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-02 20:33:36,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 34. [2022-11-02 20:33:36,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 states have internal predecessors, (45), 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 20:33:36,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2022-11-02 20:33:36,384 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 18 [2022-11-02 20:33:36,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:33:36,384 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2022-11-02 20:33:36,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:33:36,385 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2022-11-02 20:33:36,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:33:36,385 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:36,385 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:36,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-02 20:33:36,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:33:36,591 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:36,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:36,591 INFO L85 PathProgramCache]: Analyzing trace with hash -43926287, now seen corresponding path program 1 times [2022-11-02 20:33:36,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:33:36,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1145674279] [2022-11-02 20:33:36,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:36,592 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:33:36,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:33:36,593 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:33:36,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-02 20:33:36,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:36,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-02 20:33:36,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:33:37,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:37,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:33:39,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:39,051 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:33:39,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1145674279] [2022-11-02 20:33:39,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1145674279] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:33:39,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:33:39,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-02 20:33:39,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905552436] [2022-11-02 20:33:39,052 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:33:39,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:33:39,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:33:39,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:33:39,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:33:39,053 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:33:39,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:33:39,272 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2022-11-02 20:33:39,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:33:39,273 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 18 [2022-11-02 20:33:39,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:33:39,273 INFO L225 Difference]: With dead ends: 87 [2022-11-02 20:33:39,273 INFO L226 Difference]: Without dead ends: 85 [2022-11-02 20:33:39,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:33:39,275 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 130 mSDsluCounter, 1018 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 1078 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:33:39,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 1078 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 199 Unchecked, 0.0s Time] [2022-11-02 20:33:39,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-02 20:33:39,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 38. [2022-11-02 20:33:39,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 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 20:33:39,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2022-11-02 20:33:39,281 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 18 [2022-11-02 20:33:39,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:33:39,282 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2022-11-02 20:33:39,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:33:39,282 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2022-11-02 20:33:39,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:33:39,283 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:39,283 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:39,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-02 20:33:39,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:33:39,491 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:39,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:39,491 INFO L85 PathProgramCache]: Analyzing trace with hash -42079245, now seen corresponding path program 1 times [2022-11-02 20:33:39,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:33:39,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1094686682] [2022-11-02 20:33:39,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:39,492 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:33:39,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:33:39,493 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:33:39,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-02 20:33:39,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:39,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-02 20:33:39,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:33:40,326 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:40,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:33:41,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:41,946 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:33:41,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1094686682] [2022-11-02 20:33:41,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1094686682] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:33:41,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:33:41,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-02 20:33:41,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161684637] [2022-11-02 20:33:41,946 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:33:41,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:33:41,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:33:41,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:33:41,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:33:41,948 INFO L87 Difference]: Start difference. First operand 38 states and 51 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:33:42,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:33:42,201 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2022-11-02 20:33:42,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:33:42,202 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 18 [2022-11-02 20:33:42,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:33:42,203 INFO L225 Difference]: With dead ends: 87 [2022-11-02 20:33:42,203 INFO L226 Difference]: Without dead ends: 85 [2022-11-02 20:33:42,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:33:42,205 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 149 mSDsluCounter, 766 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 230 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:33:42,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 826 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 230 Unchecked, 0.0s Time] [2022-11-02 20:33:42,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-02 20:33:42,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 36. [2022-11-02 20:33:42,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 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 20:33:42,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2022-11-02 20:33:42,211 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 18 [2022-11-02 20:33:42,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:33:42,212 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2022-11-02 20:33:42,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:33:42,212 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2022-11-02 20:33:42,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:33:42,213 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:42,213 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:42,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-02 20:33:42,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:33:42,419 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:42,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:42,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1731081075, now seen corresponding path program 1 times [2022-11-02 20:33:42,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:33:42,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [551512217] [2022-11-02 20:33:42,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:42,419 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:33:42,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:33:42,422 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:33:42,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-02 20:33:42,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:42,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-02 20:33:42,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:33:43,115 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:43,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:33:44,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:33:44,511 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:33:44,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [551512217] [2022-11-02 20:33:44,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [551512217] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:33:44,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:33:44,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-02 20:33:44,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674682404] [2022-11-02 20:33:44,511 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:33:44,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:33:44,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:33:44,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:33:44,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:33:44,513 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:33:44,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:33:44,738 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2022-11-02 20:33:44,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:33:44,739 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 18 [2022-11-02 20:33:44,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:33:44,740 INFO L225 Difference]: With dead ends: 87 [2022-11-02 20:33:44,740 INFO L226 Difference]: Without dead ends: 85 [2022-11-02 20:33:44,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=85, Invalid=845, Unknown=0, NotChecked=0, Total=930 [2022-11-02 20:33:44,742 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 133 mSDsluCounter, 880 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:33:44,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 940 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 201 Unchecked, 0.0s Time] [2022-11-02 20:33:44,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-02 20:33:44,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 38. [2022-11-02 20:33:44,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 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 20:33:44,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2022-11-02 20:33:44,748 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 18 [2022-11-02 20:33:44,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:33:44,748 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2022-11-02 20:33:44,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:33:44,748 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2022-11-02 20:33:44,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:33:44,749 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:33:44,749 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:33:44,767 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-02 20:33:44,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:33:44,961 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:33:44,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:33:44,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1732928117, now seen corresponding path program 1 times [2022-11-02 20:33:44,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:33:44,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1760711700] [2022-11-02 20:33:44,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:33:44,962 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:33:44,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:33:44,963 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:33:44,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-02 20:33:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:33:45,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-02 20:33:45,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:34:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:42,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:34:50,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:34:50,019 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:34:50,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1760711700] [2022-11-02 20:34:50,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1760711700] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:34:50,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:34:50,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-02 20:34:50,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883296948] [2022-11-02 20:34:50,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:34:50,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:34:50,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:34:50,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:34:50,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=666, Unknown=24, NotChecked=0, Total=756 [2022-11-02 20:34:50,022 INFO L87 Difference]: Start difference. First operand 38 states and 51 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:35:07,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:35:07,178 INFO L93 Difference]: Finished difference Result 87 states and 116 transitions. [2022-11-02 20:35:07,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-02 20:35:07,179 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 18 [2022-11-02 20:35:07,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:35:07,180 INFO L225 Difference]: With dead ends: 87 [2022-11-02 20:35:07,181 INFO L226 Difference]: Without dead ends: 85 [2022-11-02 20:35:07,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 81.8s TimeCoverageRelationStatistics Valid=85, Invalid=821, Unknown=24, NotChecked=0, Total=930 [2022-11-02 20:35:07,182 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 122 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:35:07,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 916 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 182 Unchecked, 0.0s Time] [2022-11-02 20:35:07,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-02 20:35:07,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 32. [2022-11-02 20:35:07,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 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 20:35:07,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-11-02 20:35:07,191 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 18 [2022-11-02 20:35:07,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:35:07,191 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-11-02 20:35:07,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:35:07,192 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-11-02 20:35:07,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:35:07,193 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:35:07,193 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:35:07,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2022-11-02 20:35:07,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:35:07,408 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:35:07,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:35:07,408 INFO L85 PathProgramCache]: Analyzing trace with hash -609726093, now seen corresponding path program 1 times [2022-11-02 20:35:07,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:35:07,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1219158917] [2022-11-02 20:35:07,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:07,409 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:35:07,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:35:07,410 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:35:07,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-02 20:35:07,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:35:07,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-02 20:35:07,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:35:08,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:35:08,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:35:10,018 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:35:10,018 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:35:10,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1219158917] [2022-11-02 20:35:10,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1219158917] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:35:10,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:35:10,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-02 20:35:10,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300156464] [2022-11-02 20:35:10,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:35:10,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:35:10,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:35:10,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:35:10,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:35:10,021 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:35:11,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:35:11,368 INFO L93 Difference]: Finished difference Result 81 states and 106 transitions. [2022-11-02 20:35:11,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-02 20:35:11,369 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 18 [2022-11-02 20:35:11,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:35:11,370 INFO L225 Difference]: With dead ends: 81 [2022-11-02 20:35:11,370 INFO L226 Difference]: Without dead ends: 79 [2022-11-02 20:35:11,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=242, Invalid=1738, Unknown=0, NotChecked=0, Total=1980 [2022-11-02 20:35:11,371 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 114 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 867 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 298 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:35:11,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 867 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 298 Unchecked, 0.1s Time] [2022-11-02 20:35:11,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-02 20:35:11,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 40. [2022-11-02 20:35:11,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 39 states have internal predecessors, (54), 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 20:35:11,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2022-11-02 20:35:11,379 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 18 [2022-11-02 20:35:11,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:35:11,380 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2022-11-02 20:35:11,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:35:11,380 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2022-11-02 20:35:11,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:35:11,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:35:11,381 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:35:11,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-02 20:35:11,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:35:11,587 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:35:11,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:35:11,587 INFO L85 PathProgramCache]: Analyzing trace with hash -607879051, now seen corresponding path program 1 times [2022-11-02 20:35:11,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:35:11,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1531669000] [2022-11-02 20:35:11,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:11,588 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:35:11,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:35:11,590 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:35:11,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-02 20:35:11,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:35:11,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-02 20:35:11,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:35:12,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:35:12,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:35:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:35:14,363 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:35:14,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1531669000] [2022-11-02 20:35:14,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1531669000] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:35:14,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:35:14,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-02 20:35:14,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625638181] [2022-11-02 20:35:14,364 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:35:14,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:35:14,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:35:14,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:35:14,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:35:14,366 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:35:16,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:35:16,047 INFO L93 Difference]: Finished difference Result 87 states and 114 transitions. [2022-11-02 20:35:16,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-02 20:35:16,048 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 18 [2022-11-02 20:35:16,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:35:16,048 INFO L225 Difference]: With dead ends: 87 [2022-11-02 20:35:16,049 INFO L226 Difference]: Without dead ends: 85 [2022-11-02 20:35:16,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=255, Invalid=1815, Unknown=0, NotChecked=0, Total=2070 [2022-11-02 20:35:16,050 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 138 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 851 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:35:16,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 851 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 79 Invalid, 0 Unknown, 184 Unchecked, 0.1s Time] [2022-11-02 20:35:16,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-02 20:35:16,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 38. [2022-11-02 20:35:16,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 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 20:35:16,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2022-11-02 20:35:16,058 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 18 [2022-11-02 20:35:16,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:35:16,058 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2022-11-02 20:35:16,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:35:16,059 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2022-11-02 20:35:16,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:35:16,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:35:16,060 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:35:16,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-11-02 20:35:16,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:35:16,272 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:35:16,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:35:16,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1165281269, now seen corresponding path program 1 times [2022-11-02 20:35:16,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:35:16,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [636226799] [2022-11-02 20:35:16,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:16,274 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:35:16,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:35:16,276 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:35:16,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-02 20:35:16,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:35:16,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-02 20:35:16,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:35:16,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:35:16,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:35:18,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:35:18,479 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:35:18,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [636226799] [2022-11-02 20:35:18,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [636226799] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:35:18,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:35:18,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-02 20:35:18,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457902979] [2022-11-02 20:35:18,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:35:18,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:35:18,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:35:18,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:35:18,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:35:18,482 INFO L87 Difference]: Start difference. First operand 38 states and 51 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:35:19,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:35:19,775 INFO L93 Difference]: Finished difference Result 77 states and 102 transitions. [2022-11-02 20:35:19,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 20:35:19,776 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 18 [2022-11-02 20:35:19,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:35:19,777 INFO L225 Difference]: With dead ends: 77 [2022-11-02 20:35:19,777 INFO L226 Difference]: Without dead ends: 75 [2022-11-02 20:35:19,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=252, Invalid=1728, Unknown=0, NotChecked=0, Total=1980 [2022-11-02 20:35:19,779 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 160 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:35:19,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 761 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 54 Invalid, 0 Unknown, 257 Unchecked, 0.1s Time] [2022-11-02 20:35:19,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-02 20:35:19,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 40. [2022-11-02 20:35:19,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 39 states have internal predecessors, (54), 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 20:35:19,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2022-11-02 20:35:19,788 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 18 [2022-11-02 20:35:19,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:35:19,788 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2022-11-02 20:35:19,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:35:19,788 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2022-11-02 20:35:19,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:35:19,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:35:19,789 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:35:19,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-02 20:35:20,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:35:20,004 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:35:20,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:35:20,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1167128311, now seen corresponding path program 1 times [2022-11-02 20:35:20,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:35:20,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [736835864] [2022-11-02 20:35:20,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:20,006 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:35:20,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:35:20,007 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:35:20,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-02 20:35:20,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:35:20,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-02 20:35:20,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:35:40,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:35:40,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:35:46,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:35:46,045 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:35:46,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [736835864] [2022-11-02 20:35:46,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [736835864] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:35:46,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:35:46,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-02 20:35:46,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241380657] [2022-11-02 20:35:46,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:35:46,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:35:46,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:35:46,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:35:46,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=684, Unknown=6, NotChecked=0, Total=756 [2022-11-02 20:35:46,047 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:35:47,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:35:47,801 INFO L93 Difference]: Finished difference Result 72 states and 95 transitions. [2022-11-02 20:35:47,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-02 20:35:47,802 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 18 [2022-11-02 20:35:47,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:35:47,803 INFO L225 Difference]: With dead ends: 72 [2022-11-02 20:35:47,803 INFO L226 Difference]: Without dead ends: 70 [2022-11-02 20:35:47,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 27.3s TimeCoverageRelationStatistics Valid=249, Invalid=1551, Unknown=6, NotChecked=0, Total=1806 [2022-11-02 20:35:47,805 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 128 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 692 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 278 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:35:47,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 692 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 278 Unchecked, 0.1s Time] [2022-11-02 20:35:47,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-02 20:35:47,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 36. [2022-11-02 20:35:47,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 35 states have internal predecessors, (48), 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 20:35:47,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2022-11-02 20:35:47,813 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 18 [2022-11-02 20:35:47,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:35:47,813 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2022-11-02 20:35:47,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:35:47,814 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2022-11-02 20:35:47,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:35:47,814 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:35:47,814 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:35:47,826 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2022-11-02 20:35:48,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:35:48,019 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:35:48,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:35:48,019 INFO L85 PathProgramCache]: Analyzing trace with hash 70332277, now seen corresponding path program 1 times [2022-11-02 20:35:48,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:35:48,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1589475660] [2022-11-02 20:35:48,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:48,020 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:35:48,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:35:48,021 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:35:48,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2022-11-02 20:35:48,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:35:48,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 43 conjunts are in the unsatisfiable core [2022-11-02 20:35:48,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:35:48,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:35:48,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:35:50,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:35:50,417 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:35:50,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1589475660] [2022-11-02 20:35:50,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1589475660] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:35:50,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:35:50,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-02 20:35:50,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475500747] [2022-11-02 20:35:50,418 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:35:50,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:35:50,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:35:50,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:35:50,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:35:50,420 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:35:51,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:35:51,818 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2022-11-02 20:35:51,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-02 20:35:51,819 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 18 [2022-11-02 20:35:51,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:35:51,819 INFO L225 Difference]: With dead ends: 84 [2022-11-02 20:35:51,819 INFO L226 Difference]: Without dead ends: 82 [2022-11-02 20:35:51,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=331, Invalid=1831, Unknown=0, NotChecked=0, Total=2162 [2022-11-02 20:35:51,821 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 146 mSDsluCounter, 877 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:35:51,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 932 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 80 Invalid, 0 Unknown, 241 Unchecked, 0.2s Time] [2022-11-02 20:35:51,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-02 20:35:51,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 40. [2022-11-02 20:35:51,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 39 states have internal predecessors, (54), 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 20:35:51,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2022-11-02 20:35:51,831 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 18 [2022-11-02 20:35:51,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:35:51,831 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2022-11-02 20:35:51,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:35:51,832 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2022-11-02 20:35:51,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:35:51,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:35:51,833 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:35:51,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (23)] Forceful destruction successful, exit code 0 [2022-11-02 20:35:52,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:35:52,039 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:35:52,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:35:52,039 INFO L85 PathProgramCache]: Analyzing trace with hash 72179319, now seen corresponding path program 1 times [2022-11-02 20:35:52,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:35:52,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [348181490] [2022-11-02 20:35:52,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:52,040 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:35:52,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:35:52,041 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:35:52,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2022-11-02 20:35:52,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:35:52,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-02 20:35:52,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:35:52,819 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:35:52,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:35:54,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:35:54,546 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:35:54,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [348181490] [2022-11-02 20:35:54,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [348181490] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:35:54,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:35:54,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-02 20:35:54,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119147423] [2022-11-02 20:35:54,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:35:54,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:35:54,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:35:54,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:35:54,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:35:54,549 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:35:58,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:35:58,887 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2022-11-02 20:35:58,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-02 20:35:58,888 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 18 [2022-11-02 20:35:58,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:35:58,889 INFO L225 Difference]: With dead ends: 84 [2022-11-02 20:35:58,889 INFO L226 Difference]: Without dead ends: 82 [2022-11-02 20:35:58,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=331, Invalid=1831, Unknown=0, NotChecked=0, Total=2162 [2022-11-02 20:35:58,891 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 153 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 376 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:35:58,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 857 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 121 Invalid, 0 Unknown, 376 Unchecked, 0.2s Time] [2022-11-02 20:35:58,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-11-02 20:35:58,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 38. [2022-11-02 20:35:58,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 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 20:35:58,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2022-11-02 20:35:58,900 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 18 [2022-11-02 20:35:58,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:35:58,901 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2022-11-02 20:35:58,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:35:58,901 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2022-11-02 20:35:58,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:35:58,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:35:58,902 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:35:58,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2022-11-02 20:35:59,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:35:59,102 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:35:59,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:35:59,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1845339639, now seen corresponding path program 1 times [2022-11-02 20:35:59,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:35:59,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [648540402] [2022-11-02 20:35:59,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:35:59,104 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:35:59,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:35:59,105 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:35:59,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2022-11-02 20:35:59,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:35:59,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-02 20:35:59,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:35:59,723 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:35:59,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:01,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:01,298 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:36:01,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [648540402] [2022-11-02 20:36:01,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [648540402] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:36:01,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:36:01,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-02 20:36:01,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064178105] [2022-11-02 20:36:01,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:01,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:36:01,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:36:01,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:36:01,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:36:01,301 INFO L87 Difference]: Start difference. First operand 38 states and 51 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:36:03,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:03,383 INFO L93 Difference]: Finished difference Result 101 states and 132 transitions. [2022-11-02 20:36:03,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-02 20:36:03,383 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 18 [2022-11-02 20:36:03,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:03,384 INFO L225 Difference]: With dead ends: 101 [2022-11-02 20:36:03,385 INFO L226 Difference]: Without dead ends: 99 [2022-11-02 20:36:03,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=547, Invalid=2759, Unknown=0, NotChecked=0, Total=3306 [2022-11-02 20:36:03,387 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 165 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:03,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 1094 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 170 Invalid, 0 Unknown, 233 Unchecked, 0.3s Time] [2022-11-02 20:36:03,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-02 20:36:03,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 40. [2022-11-02 20:36:03,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 39 states have internal predecessors, (54), 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 20:36:03,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2022-11-02 20:36:03,398 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 18 [2022-11-02 20:36:03,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:03,398 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2022-11-02 20:36:03,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:36:03,399 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2022-11-02 20:36:03,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:36:03,400 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:03,400 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:03,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:03,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:36:03,607 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:36:03,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:03,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1847186681, now seen corresponding path program 1 times [2022-11-02 20:36:03,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:36:03,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [31292901] [2022-11-02 20:36:03,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:03,608 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:36:03,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:36:03,609 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:36:03,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2022-11-02 20:36:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:03,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-02 20:36:03,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:04,067 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:04,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:05,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:05,219 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:36:05,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [31292901] [2022-11-02 20:36:05,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [31292901] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:36:05,220 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:36:05,220 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-02 20:36:05,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895528435] [2022-11-02 20:36:05,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:05,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:36:05,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:36:05,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:36:05,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:36:05,222 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:36:07,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:07,444 INFO L93 Difference]: Finished difference Result 107 states and 142 transitions. [2022-11-02 20:36:07,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-02 20:36:07,444 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 18 [2022-11-02 20:36:07,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:07,445 INFO L225 Difference]: With dead ends: 107 [2022-11-02 20:36:07,445 INFO L226 Difference]: Without dead ends: 105 [2022-11-02 20:36:07,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=715, Invalid=3317, Unknown=0, NotChecked=0, Total=4032 [2022-11-02 20:36:07,446 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 207 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 1164 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 308 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:07,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 1164 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 222 Invalid, 0 Unknown, 308 Unchecked, 0.4s Time] [2022-11-02 20:36:07,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-02 20:36:07,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 34. [2022-11-02 20:36:07,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 33 states have internal predecessors, (45), 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 20:36:07,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2022-11-02 20:36:07,458 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 18 [2022-11-02 20:36:07,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:07,458 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2022-11-02 20:36:07,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:36:07,459 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2022-11-02 20:36:07,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:36:07,459 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:07,460 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:07,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2022-11-02 20:36:07,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:36:07,663 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:36:07,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:07,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1310790671, now seen corresponding path program 1 times [2022-11-02 20:36:07,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:36:07,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1224896168] [2022-11-02 20:36:07,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:07,664 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:36:07,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:36:07,665 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:36:07,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2022-11-02 20:36:07,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:07,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-02 20:36:07,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:08,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:08,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:10,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:10,346 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:36:10,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1224896168] [2022-11-02 20:36:10,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1224896168] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:36:10,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:36:10,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-02 20:36:10,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394034683] [2022-11-02 20:36:10,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:10,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:36:10,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:36:10,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:36:10,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:36:10,348 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:36:11,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:11,908 INFO L93 Difference]: Finished difference Result 77 states and 102 transitions. [2022-11-02 20:36:11,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 20:36:11,909 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 18 [2022-11-02 20:36:11,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:11,910 INFO L225 Difference]: With dead ends: 77 [2022-11-02 20:36:11,910 INFO L226 Difference]: Without dead ends: 75 [2022-11-02 20:36:11,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=237, Invalid=1743, Unknown=0, NotChecked=0, Total=1980 [2022-11-02 20:36:11,912 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 140 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:11,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 952 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 268 Unchecked, 0.1s Time] [2022-11-02 20:36:11,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-02 20:36:11,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 40. [2022-11-02 20:36:11,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 39 states have internal predecessors, (54), 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 20:36:11,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2022-11-02 20:36:11,921 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 18 [2022-11-02 20:36:11,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:11,921 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2022-11-02 20:36:11,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:36:11,921 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2022-11-02 20:36:11,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:36:11,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:11,922 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:11,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:12,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:36:12,122 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:36:12,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:12,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1308943629, now seen corresponding path program 1 times [2022-11-02 20:36:12,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:36:12,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1113920060] [2022-11-02 20:36:12,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:12,124 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:36:12,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:36:12,125 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:36:12,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2022-11-02 20:36:12,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:12,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-02 20:36:12,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:16,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:16,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:18,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:18,508 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:36:18,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1113920060] [2022-11-02 20:36:18,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1113920060] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:36:18,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:36:18,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-02 20:36:18,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522915823] [2022-11-02 20:36:18,509 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:18,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:36:18,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:36:18,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:36:18,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=689, Unknown=1, NotChecked=0, Total=756 [2022-11-02 20:36:18,511 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:36:20,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:20,133 INFO L93 Difference]: Finished difference Result 77 states and 102 transitions. [2022-11-02 20:36:20,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 20:36:20,133 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 18 [2022-11-02 20:36:20,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:20,134 INFO L225 Difference]: With dead ends: 77 [2022-11-02 20:36:20,134 INFO L226 Difference]: Without dead ends: 75 [2022-11-02 20:36:20,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=237, Invalid=1742, Unknown=1, NotChecked=0, Total=1980 [2022-11-02 20:36:20,136 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 139 mSDsluCounter, 848 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 375 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:20,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 910 Invalid, 401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 375 Unchecked, 0.1s Time] [2022-11-02 20:36:20,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-11-02 20:36:20,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 38. [2022-11-02 20:36:20,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 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 20:36:20,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 51 transitions. [2022-11-02 20:36:20,148 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 51 transitions. Word has length 18 [2022-11-02 20:36:20,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:20,148 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 51 transitions. [2022-11-02 20:36:20,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:36:20,149 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2022-11-02 20:36:20,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:36:20,149 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:20,149 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:20,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:20,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:36:20,365 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:36:20,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:20,365 INFO L85 PathProgramCache]: Analyzing trace with hash 464216691, now seen corresponding path program 1 times [2022-11-02 20:36:20,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:36:20,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1262643888] [2022-11-02 20:36:20,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:20,366 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:36:20,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:36:20,367 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:36:20,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2022-11-02 20:36:20,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:20,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-02 20:36:20,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:21,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:21,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:23,027 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:23,027 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:36:23,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1262643888] [2022-11-02 20:36:23,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1262643888] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:36:23,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:36:23,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-02 20:36:23,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077314733] [2022-11-02 20:36:23,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:23,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:36:23,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:36:23,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:36:23,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:36:23,030 INFO L87 Difference]: Start difference. First operand 38 states and 51 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:36:24,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:24,577 INFO L93 Difference]: Finished difference Result 81 states and 106 transitions. [2022-11-02 20:36:24,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-02 20:36:24,578 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 18 [2022-11-02 20:36:24,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:24,579 INFO L225 Difference]: With dead ends: 81 [2022-11-02 20:36:24,579 INFO L226 Difference]: Without dead ends: 79 [2022-11-02 20:36:24,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=244, Invalid=1826, Unknown=0, NotChecked=0, Total=2070 [2022-11-02 20:36:24,581 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 148 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 856 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 260 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:24,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 856 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 260 Unchecked, 0.1s Time] [2022-11-02 20:36:24,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-11-02 20:36:24,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 40. [2022-11-02 20:36:24,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 39 states have internal predecessors, (54), 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 20:36:24,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2022-11-02 20:36:24,590 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 18 [2022-11-02 20:36:24,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:24,590 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2022-11-02 20:36:24,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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 20:36:24,591 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2022-11-02 20:36:24,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-02 20:36:24,591 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:24,591 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:24,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:24,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:36:24,801 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:36:24,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:24,801 INFO L85 PathProgramCache]: Analyzing trace with hash 466063733, now seen corresponding path program 1 times [2022-11-02 20:36:24,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:36:24,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26319657] [2022-11-02 20:36:24,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:24,802 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:36:24,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:36:24,803 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:36:24,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d2865b3f-c5b0-4655-9fb6-5ebfa8c7476f/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2022-11-02 20:36:24,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:24,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-02 20:36:24,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:25,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:27,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:27,512 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:36:27,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26319657] [2022-11-02 20:36:27,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26319657] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:36:27,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:36:27,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-11-02 20:36:27,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444422590] [2022-11-02 20:36:27,513 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:27,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-02 20:36:27,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:36:27,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-02 20:36:27,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2022-11-02 20:36:27,515 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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)