./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_4+newton_3_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/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_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_3_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/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 32bit --witnessprinter.graph.data.programhash fac7e7835446ac69229cd712eb8181e46fef468b0e6881ccc6e306adaaef48bd --- 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 20:36:41,605 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:36:41,607 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:36:41,635 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:36:41,636 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:36:41,637 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:36:41,638 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:36:41,640 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:36:41,642 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:36:41,642 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:36:41,644 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:36:41,645 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:36:41,645 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:36:41,646 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:36:41,648 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:36:41,649 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:36:41,650 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:36:41,651 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:36:41,653 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:36:41,655 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:36:41,656 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:36:41,658 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:36:41,659 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:36:41,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:36:41,663 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:36:41,664 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:36:41,664 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:36:41,665 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:36:41,666 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:36:41,667 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:36:41,667 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:36:41,668 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:36:41,669 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:36:41,670 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:36:41,671 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:36:41,672 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:36:41,672 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:36:41,673 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:36:41,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:36:41,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:36:41,675 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:36:41,676 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:36:41,699 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:36:41,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:36:41,699 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:36:41,699 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:36:41,700 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:36:41,700 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:36:41,701 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:36:41,704 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:36:41,704 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:36:41,704 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:36:41,705 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:36:41,705 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:36:41,705 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:36:41,705 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:36:41,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:36:41,706 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:36:41,706 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:36:41,706 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:36:41,706 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:36:41,706 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:36:41,707 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:36:41,707 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:36:41,707 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:36:41,707 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:36:41,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:36:41,708 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:36:41,708 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:36:41,708 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:36:41,708 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:36:41,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:36:41,709 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:36:41,709 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:36:41,709 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:36:41,709 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_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fac7e7835446ac69229cd712eb8181e46fef468b0e6881ccc6e306adaaef48bd [2022-11-02 20:36:42,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:36:42,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:36:42,047 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:36:42,048 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:36:42,049 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:36:42,050 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/combinations/gcd_4+newton_3_3.i [2022-11-02 20:36:42,141 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/data/abb43dbbd/23d2c8310c4b49f1899f6ef9edc55afa/FLAG10d353479 [2022-11-02 20:36:42,683 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:36:42,683 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/sv-benchmarks/c/combinations/gcd_4+newton_3_3.i [2022-11-02 20:36:42,699 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/data/abb43dbbd/23d2c8310c4b49f1899f6ef9edc55afa/FLAG10d353479 [2022-11-02 20:36:43,028 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/data/abb43dbbd/23d2c8310c4b49f1899f6ef9edc55afa [2022-11-02 20:36:43,031 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:36:43,033 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:36:43,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:36:43,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:36:43,047 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:36:43,048 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:36:43" (1/1) ... [2022-11-02 20:36:43,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a441801 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:43, skipping insertion in model container [2022-11-02 20:36:43,052 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:36:43" (1/1) ... [2022-11-02 20:36:43,064 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:36:43,091 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:36:43,282 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_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/sv-benchmarks/c/combinations/gcd_4+newton_3_3.i[1224,1237] [2022-11-02 20:36:43,328 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_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/sv-benchmarks/c/combinations/gcd_4+newton_3_3.i[2848,2861] [2022-11-02 20:36:43,330 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:36:43,338 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:36:43,351 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_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/sv-benchmarks/c/combinations/gcd_4+newton_3_3.i[1224,1237] [2022-11-02 20:36:43,360 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_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/sv-benchmarks/c/combinations/gcd_4+newton_3_3.i[2848,2861] [2022-11-02 20:36:43,362 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:36:43,376 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:36:43,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:43 WrapperNode [2022-11-02 20:36:43,377 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:36:43,378 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:36:43,378 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:36:43,378 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:36:43,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:43" (1/1) ... [2022-11-02 20:36:43,394 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:43" (1/1) ... [2022-11-02 20:36:43,420 INFO L138 Inliner]: procedures = 27, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 77 [2022-11-02 20:36:43,423 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:36:43,424 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:36:43,424 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:36:43,424 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:36:43,434 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:43" (1/1) ... [2022-11-02 20:36:43,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:43" (1/1) ... [2022-11-02 20:36:43,436 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:43" (1/1) ... [2022-11-02 20:36:43,436 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:43" (1/1) ... [2022-11-02 20:36:43,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:43" (1/1) ... [2022-11-02 20:36:43,456 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:43" (1/1) ... [2022-11-02 20:36:43,458 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:43" (1/1) ... [2022-11-02 20:36:43,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:43" (1/1) ... [2022-11-02 20:36:43,470 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:36:43,473 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:36:43,473 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:36:43,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:36:43,476 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:43" (1/1) ... [2022-11-02 20:36:43,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:36:43,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:43,518 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:36:43,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:36:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:36:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-02 20:36:43,572 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-02 20:36:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-02 20:36:43,572 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-02 20:36:43,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:36:43,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:36:43,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:36:43,573 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-02 20:36:43,573 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-02 20:36:43,656 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:36:43,658 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:36:43,877 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:36:43,901 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:36:43,901 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 20:36:43,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:36:43 BoogieIcfgContainer [2022-11-02 20:36:43,904 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:36:43,906 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:36:43,906 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:36:43,910 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:36:43,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:36:43" (1/3) ... [2022-11-02 20:36:43,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60e3c925 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:36:43, skipping insertion in model container [2022-11-02 20:36:43,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:43" (2/3) ... [2022-11-02 20:36:43,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60e3c925 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:36:43, skipping insertion in model container [2022-11-02 20:36:43,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:36:43" (3/3) ... [2022-11-02 20:36:43,913 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_3_3.i [2022-11-02 20:36:43,932 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:36:43,933 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-02 20:36:43,984 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:36:43,992 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;@3595fea7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:36:43,992 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:36:43,997 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-02 20:36:44,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-02 20:36:44,012 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:44,012 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:44,013 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:36:44,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:44,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1780387208, now seen corresponding path program 1 times [2022-11-02 20:36:44,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:44,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390451327] [2022-11-02 20:36:44,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:44,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:44,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:44,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:44,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390451327] [2022-11-02 20:36:44,233 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 20:36:44,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175186031] [2022-11-02 20:36:44,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:44,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:44,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:44,240 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:44,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:36:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:44,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:36:44,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:44,438 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 20:36:44,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:36:44,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175186031] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:44,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:36:44,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:36:44,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639552542] [2022-11-02 20:36:44,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:44,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:36:44,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:44,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:36:44,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:36:44,492 INFO L87 Difference]: Start difference. First operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:44,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:44,571 INFO L93 Difference]: Finished difference Result 97 states and 134 transitions. [2022-11-02 20:36:44,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:36:44,574 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-02 20:36:44,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:44,587 INFO L225 Difference]: With dead ends: 97 [2022-11-02 20:36:44,588 INFO L226 Difference]: Without dead ends: 45 [2022-11-02 20:36:44,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:36:44,598 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 11 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:44,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 100 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:36:44,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-02 20:36:44,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2022-11-02 20:36:44,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 20:36:44,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-11-02 20:36:44,669 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 11 [2022-11-02 20:36:44,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:44,670 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-11-02 20:36:44,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:44,671 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-11-02 20:36:44,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-02 20:36:44,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:44,674 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:44,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:44,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-02 20:36:44,889 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:36:44,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:44,890 INFO L85 PathProgramCache]: Analyzing trace with hash -5379846, now seen corresponding path program 1 times [2022-11-02 20:36:44,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:44,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647159393] [2022-11-02 20:36:44,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:44,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:44,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:44,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:44,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647159393] [2022-11-02 20:36:44,912 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 20:36:44,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100016637] [2022-11-02 20:36:44,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:44,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:44,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:44,914 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:44,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:36:44,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:44,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:36:44,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:44,984 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 20:36:44,984 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:36:44,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100016637] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:44,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:36:44,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:36:44,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323672016] [2022-11-02 20:36:44,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:44,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:36:44,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:44,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:36:44,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:36:44,987 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:45,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:45,006 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2022-11-02 20:36:45,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:36:45,007 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-02 20:36:45,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:45,008 INFO L225 Difference]: With dead ends: 67 [2022-11-02 20:36:45,009 INFO L226 Difference]: Without dead ends: 50 [2022-11-02 20:36:45,009 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:36:45,010 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 8 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:45,011 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 82 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:36:45,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-02 20:36:45,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2022-11-02 20:36:45,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 20:36:45,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-11-02 20:36:45,019 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 11 [2022-11-02 20:36:45,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:45,020 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-11-02 20:36:45,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:45,020 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-11-02 20:36:45,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-02 20:36:45,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:45,021 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:45,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:45,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-02 20:36:45,249 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:36:45,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:45,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1714945339, now seen corresponding path program 1 times [2022-11-02 20:36:45,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:45,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090446619] [2022-11-02 20:36:45,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:45,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:45,267 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:36:45,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [217323653] [2022-11-02 20:36:45,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:45,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:45,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:45,280 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:45,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:36:45,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:45,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:36:45,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:45,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:45,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:36:45,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:45,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090446619] [2022-11-02 20:36:45,386 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:36:45,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217323653] [2022-11-02 20:36:45,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217323653] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:36:45,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:36:45,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:36:45,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421107138] [2022-11-02 20:36:45,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:36:45,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:36:45,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:45,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:36:45,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:36:45,389 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:45,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:45,415 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2022-11-02 20:36:45,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:36:45,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-02 20:36:45,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:45,417 INFO L225 Difference]: With dead ends: 56 [2022-11-02 20:36:45,417 INFO L226 Difference]: Without dead ends: 43 [2022-11-02 20:36:45,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:36:45,419 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:45,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:36:45,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-02 20:36:45,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-02 20:36:45,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 20:36:45,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-11-02 20:36:45,434 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 15 [2022-11-02 20:36:45,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:45,435 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-11-02 20:36:45,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:45,435 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-11-02 20:36:45,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 20:36:45,436 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:45,437 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:45,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:45,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:45,669 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:36:45,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:45,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1030187394, now seen corresponding path program 1 times [2022-11-02 20:36:45,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:45,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735178172] [2022-11-02 20:36:45,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:45,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:45,706 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:36:45,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876784571] [2022-11-02 20:36:45,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:45,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:45,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:45,708 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:45,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:36:45,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:45,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:36:45,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:45,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:45,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:45,926 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:45,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:45,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735178172] [2022-11-02 20:36:45,927 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:36:45,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876784571] [2022-11-02 20:36:45,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876784571] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:36:45,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:36:45,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-11-02 20:36:45,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112419767] [2022-11-02 20:36:45,928 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:45,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:36:45,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:45,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:36:45,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:36:45,930 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:45,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:45,982 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2022-11-02 20:36:45,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:36:45,983 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-02 20:36:45,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:45,984 INFO L225 Difference]: With dead ends: 60 [2022-11-02 20:36:45,984 INFO L226 Difference]: Without dead ends: 47 [2022-11-02 20:36:45,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-11-02 20:36:45,986 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:45,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 152 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:36:45,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-02 20:36:45,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-02 20:36:45,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 20:36:45,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-11-02 20:36:45,995 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 17 [2022-11-02 20:36:45,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:45,995 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-11-02 20:36:45,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:45,996 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-11-02 20:36:45,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-02 20:36:45,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:45,997 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:46,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:46,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:46,216 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:36:46,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:46,217 INFO L85 PathProgramCache]: Analyzing trace with hash -626272964, now seen corresponding path program 2 times [2022-11-02 20:36:46,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:46,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938624740] [2022-11-02 20:36:46,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:46,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:46,235 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:36:46,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [898335271] [2022-11-02 20:36:46,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:36:46,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:46,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:46,242 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:46,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:36:46,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:36:46,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:36:46,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 20:36:46,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:46,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:46,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:46,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:46,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938624740] [2022-11-02 20:36:46,663 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:36:46,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898335271] [2022-11-02 20:36:46,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898335271] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:36:46,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:36:46,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-02 20:36:46,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286707652] [2022-11-02 20:36:46,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:46,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:36:46,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:46,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:36:46,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:36:46,666 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:46,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:46,805 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2022-11-02 20:36:46,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 20:36:46,806 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-02 20:36:46,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:46,807 INFO L225 Difference]: With dead ends: 68 [2022-11-02 20:36:46,807 INFO L226 Difference]: Without dead ends: 53 [2022-11-02 20:36:46,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:36:46,809 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 12 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:46,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 226 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:36:46,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-02 20:36:46,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-02 20:36:46,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 41 states have internal predecessors, (45), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 20:36:46,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2022-11-02 20:36:46,820 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 21 [2022-11-02 20:36:46,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:46,820 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2022-11-02 20:36:46,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:46,821 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2022-11-02 20:36:46,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-02 20:36:46,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:46,822 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:46,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:47,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:47,049 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:36:47,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:47,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1120707465, now seen corresponding path program 3 times [2022-11-02 20:36:47,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:47,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997327030] [2022-11-02 20:36:47,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:47,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:47,062 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:36:47,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1673851806] [2022-11-02 20:36:47,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:36:47,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:47,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:47,067 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:47,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:36:47,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-02 20:36:47,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:36:47,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 20:36:47,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:47,479 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:36:47,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:36:48,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:48,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997327030] [2022-11-02 20:36:48,052 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:36:48,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673851806] [2022-11-02 20:36:48,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673851806] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:36:48,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:36:48,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-11-02 20:36:48,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707726780] [2022-11-02 20:36:48,054 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:48,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 20:36:48,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:48,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 20:36:48,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:36:48,056 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:48,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:48,560 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2022-11-02 20:36:48,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 20:36:48,562 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-02 20:36:48,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:48,563 INFO L225 Difference]: With dead ends: 73 [2022-11-02 20:36:48,563 INFO L226 Difference]: Without dead ends: 70 [2022-11-02 20:36:48,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-11-02 20:36:48,565 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 33 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:48,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 356 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 217 Invalid, 0 Unknown, 27 Unchecked, 0.3s Time] [2022-11-02 20:36:48,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-02 20:36:48,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2022-11-02 20:36:48,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 49 states have (on average 1.183673469387755) internal successors, (58), 53 states have internal predecessors, (58), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-02 20:36:48,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 80 transitions. [2022-11-02 20:36:48,580 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 80 transitions. Word has length 23 [2022-11-02 20:36:48,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:48,581 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 80 transitions. [2022-11-02 20:36:48,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:48,581 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 80 transitions. [2022-11-02 20:36:48,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-02 20:36:48,582 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:48,583 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:48,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:48,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:48,783 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:36:48,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:48,784 INFO L85 PathProgramCache]: Analyzing trace with hash 469106930, now seen corresponding path program 4 times [2022-11-02 20:36:48,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:48,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255804336] [2022-11-02 20:36:48,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:48,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:48,805 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:36:48,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [422758766] [2022-11-02 20:36:48,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:36:48,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:48,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:48,811 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:48,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:36:48,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:36:48,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:36:48,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 20:36:48,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:48,995 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:48,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:49,192 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:49,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:49,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255804336] [2022-11-02 20:36:49,193 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:36:49,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422758766] [2022-11-02 20:36:49,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422758766] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:36:49,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:36:49,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-11-02 20:36:49,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450012548] [2022-11-02 20:36:49,194 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:49,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 20:36:49,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:49,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 20:36:49,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:36:49,196 INFO L87 Difference]: Start difference. First operand 67 states and 80 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:49,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:49,412 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2022-11-02 20:36:49,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 20:36:49,413 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-02 20:36:49,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:49,414 INFO L225 Difference]: With dead ends: 86 [2022-11-02 20:36:49,414 INFO L226 Difference]: Without dead ends: 62 [2022-11-02 20:36:49,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:36:49,415 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 37 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:49,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 375 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:36:49,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-02 20:36:49,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-11-02 20:36:49,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 48 states have internal predecessors, (51), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-02 20:36:49,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2022-11-02 20:36:49,426 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 25 [2022-11-02 20:36:49,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:49,427 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2022-11-02 20:36:49,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:49,427 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2022-11-02 20:36:49,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 20:36:49,428 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:49,429 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:49,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:49,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:49,644 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:36:49,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:49,645 INFO L85 PathProgramCache]: Analyzing trace with hash -985782289, now seen corresponding path program 5 times [2022-11-02 20:36:49,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:49,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771425843] [2022-11-02 20:36:49,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:49,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:49,660 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:36:49,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087946547] [2022-11-02 20:36:49,664 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:36:49,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:49,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:49,666 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:49,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 20:36:49,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-02 20:36:49,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:36:49,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:36:49,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:49,892 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:49,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:50,070 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:36:50,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:50,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771425843] [2022-11-02 20:36:50,071 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:36:50,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087946547] [2022-11-02 20:36:50,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087946547] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:36:50,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:36:50,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-11-02 20:36:50,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228625095] [2022-11-02 20:36:50,072 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:50,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:36:50,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:50,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:36:50,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:36:50,073 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:50,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:50,192 INFO L93 Difference]: Finished difference Result 68 states and 76 transitions. [2022-11-02 20:36:50,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:36:50,193 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-02 20:36:50,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:50,194 INFO L225 Difference]: With dead ends: 68 [2022-11-02 20:36:50,194 INFO L226 Difference]: Without dead ends: 49 [2022-11-02 20:36:50,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-11-02 20:36:50,195 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:50,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 424 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:36:50,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-02 20:36:50,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-02 20:36:50,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-02 20:36:50,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-11-02 20:36:50,204 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 27 [2022-11-02 20:36:50,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:50,204 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-11-02 20:36:50,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 states have internal predecessors, (45), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:36:50,205 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-11-02 20:36:50,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 20:36:50,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:50,206 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:50,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:50,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-02 20:36:50,432 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:36:50,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:50,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1781630816, now seen corresponding path program 1 times [2022-11-02 20:36:50,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:50,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569258332] [2022-11-02 20:36:50,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:50,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:50,449 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:36:50,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [91576816] [2022-11-02 20:36:50,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:50,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:50,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:50,457 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:36:50,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 20:36:50,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:36:50,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 20:36:50,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:36:50,728 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:36:50,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:36:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:36:51,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:36:51,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569258332] [2022-11-02 20:36:51,556 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:36:51,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91576816] [2022-11-02 20:36:51,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91576816] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:36:51,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:36:51,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-11-02 20:36:51,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919815740] [2022-11-02 20:36:51,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:36:51,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 20:36:51,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:36:51,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 20:36:51,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-11-02 20:36:51,558 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:36:52,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:36:52,751 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2022-11-02 20:36:52,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:36:52,751 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-11-02 20:36:52,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:36:52,752 INFO L225 Difference]: With dead ends: 49 [2022-11-02 20:36:52,752 INFO L226 Difference]: Without dead ends: 23 [2022-11-02 20:36:52,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:36:52,753 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 13 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 20:36:52,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 330 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 20:36:52,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-02 20:36:52,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-02 20:36:52,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.0) internal successors, (14), 14 states have internal predecessors, (14), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:36:52,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-11-02 20:36:52,765 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 28 [2022-11-02 20:36:52,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:36:52,765 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-11-02 20:36:52,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 15 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:36:52,766 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-11-02 20:36:52,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-02 20:36:52,767 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:36:52,767 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:36:52,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:36:52,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:36:52,988 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:36:52,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:36:52,989 INFO L85 PathProgramCache]: Analyzing trace with hash -21288017, now seen corresponding path program 1 times [2022-11-02 20:36:52,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:36:52,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058760020] [2022-11-02 20:36:52,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:36:52,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:36:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:36:53,016 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-02 20:36:53,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-02 20:36:53,050 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-02 20:36:53,053 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-02 20:36:53,054 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2022-11-02 20:36:53,057 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-02 20:36:53,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-02 20:36:53,061 INFO L444 BasicCegarLoop]: Path program histogram: [5, 1, 1, 1, 1, 1] [2022-11-02 20:36:53,065 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-02 20:36:53,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 08:36:53 BoogieIcfgContainer [2022-11-02 20:36:53,106 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-02 20:36:53,107 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-02 20:36:53,107 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-02 20:36:53,107 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-02 20:36:53,108 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:36:43" (3/4) ... [2022-11-02 20:36:53,111 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-02 20:36:53,111 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-02 20:36:53,112 INFO L158 Benchmark]: Toolchain (without parser) took 10078.69ms. Allocated memory was 130.0MB in the beginning and 159.4MB in the end (delta: 29.4MB). Free memory was 97.7MB in the beginning and 53.2MB in the end (delta: 44.5MB). Peak memory consumption was 74.3MB. Max. memory is 16.1GB. [2022-11-02 20:36:53,112 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 94.4MB. Free memory was 49.8MB in the beginning and 49.8MB in the end (delta: 30.1kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:36:53,113 INFO L158 Benchmark]: CACSL2BoogieTranslator took 336.54ms. Allocated memory is still 130.0MB. Free memory was 97.5MB in the beginning and 104.7MB in the end (delta: -7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-02 20:36:53,113 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.01ms. Allocated memory is still 130.0MB. Free memory was 104.7MB in the beginning and 102.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-02 20:36:53,114 INFO L158 Benchmark]: Boogie Preprocessor took 48.25ms. Allocated memory is still 130.0MB. Free memory was 102.6MB in the beginning and 101.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-02 20:36:53,114 INFO L158 Benchmark]: RCFGBuilder took 431.04ms. Allocated memory is still 130.0MB. Free memory was 101.5MB in the beginning and 89.4MB in the end (delta: 12.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-02 20:36:53,114 INFO L158 Benchmark]: TraceAbstraction took 9199.57ms. Allocated memory was 130.0MB in the beginning and 159.4MB in the end (delta: 29.4MB). Free memory was 88.4MB in the beginning and 53.2MB in the end (delta: 35.2MB). Peak memory consumption was 66.6MB. Max. memory is 16.1GB. [2022-11-02 20:36:53,115 INFO L158 Benchmark]: Witness Printer took 4.44ms. Allocated memory is still 159.4MB. Free memory is still 53.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-02 20:36:53,117 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 94.4MB. Free memory was 49.8MB in the beginning and 49.8MB in the end (delta: 30.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 336.54ms. Allocated memory is still 130.0MB. Free memory was 97.5MB in the beginning and 104.7MB in the end (delta: -7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.01ms. Allocated memory is still 130.0MB. Free memory was 104.7MB in the beginning and 102.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 48.25ms. Allocated memory is still 130.0MB. Free memory was 102.6MB in the beginning and 101.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 431.04ms. Allocated memory is still 130.0MB. Free memory was 101.5MB in the beginning and 89.4MB in the end (delta: 12.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 9199.57ms. Allocated memory was 130.0MB in the beginning and 159.4MB in the end (delta: 29.4MB). Free memory was 88.4MB in the beginning and 53.2MB in the end (delta: 35.2MB). Peak memory consumption was 66.6MB. Max. memory is 16.1GB. * Witness Printer took 4.44ms. Allocated memory is still 159.4MB. Free memory is still 53.2MB. 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: 109]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 98, overapproximation of someBinaryDOUBLEComparisonOperation at line 108, overapproximation of someBinaryArithmeticFLOAToperation at line 104. Possible FailurePath: [L115] COND FALSE !(__VERIFIER_nondet_int()) [L118] CALL main2() [L97] float IN = __VERIFIER_nondet_float(); [L98] CALL assume_abort_if_not(IN > -0.6f && IN < 0.6f) [L82] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L98] RET assume_abort_if_not(IN > -0.6f && IN < 0.6f) [L100] CALL, EXPR f(IN) VAL [\old(x)=60] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=60, x=60] [L100] RET, EXPR f(IN) VAL [f(IN)=54, IN=60] [L100] CALL, EXPR fp(IN) VAL [\old(x)=60] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=60, x=60] [L100] RET, EXPR fp(IN) VAL [f(IN)=54, fp(IN)=53, IN=60] [L100] float x = IN - f(IN)/fp(IN); [L102] CALL, EXPR f(x) VAL [\old(x)=55] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=55, x=55] [L102] RET, EXPR f(x) VAL [f(x)=61, IN=60, x=55] [L102] CALL, EXPR fp(x) VAL [\old(x)=55] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=55, x=55] [L102] RET, EXPR fp(x) VAL [f(x)=61, fp(x)=56, IN=60, x=55] [L102] x = x - f(x)/fp(x) [L104] CALL, EXPR f(x) VAL [\old(x)=58] [L87] return x - (x*x*x)/6.0f + (x*x*x*x*x)/120.0f + (x*x*x*x*x*x*x)/5040.0f; VAL [\old(x)=58, x=58] [L104] RET, EXPR f(x) VAL [f(x)=57, IN=60, x=58] [L104] CALL, EXPR fp(x) VAL [\old(x)=58] [L92] return 1 - (x*x)/2.0f + (x*x*x*x)/24.0f + (x*x*x*x*x*x)/720.0f; VAL [\old(x)=58, x=58] [L104] RET, EXPR fp(x) VAL [f(x)=57, fp(x)=59, IN=60, x=58] [L104] x = x - f(x)/fp(x) [L108] COND TRUE !(x < 0.1) VAL [IN=60] [L109] reach_error() VAL [IN=60] - UnprovableResult [Line: 27]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 46 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 9.1s, OverallIterations: 10, TraceHistogramMax: 7, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 133 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 127 mSDsluCounter, 2123 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 27 IncrementalHoareTripleChecker+Unchecked, 1756 mSDsCounter, 100 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 755 IncrementalHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 100 mSolverCounterUnsat, 367 mSDtfsCounter, 755 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 326 GetRequests, 225 SyntacticMatches, 4 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=67occurred in iteration=6, InterpolantAutomatonStates: 68, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 16 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 234 NumberOfCodeBlocks, 230 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 304 ConstructedInterpolants, 11 QuantifiedInterpolants, 1639 SizeOfPredicates, 41 NumberOfNonLiveVariables, 665 ConjunctsInSsa, 106 ConjunctsInUnsatCore, 15 InterpolantComputations, 3 PerfectInterpolantSequences, 67/315 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 20:36:53,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/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-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/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_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/gcd_4+newton_3_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/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 32bit --witnessprinter.graph.data.programhash fac7e7835446ac69229cd712eb8181e46fef468b0e6881ccc6e306adaaef48bd --- 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 20:36:55,506 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:36:55,508 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:36:55,547 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:36:55,548 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:36:55,552 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:36:55,554 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:36:55,561 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:36:55,567 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:36:55,572 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:36:55,573 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:36:55,575 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:36:55,576 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:36:55,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:36:55,581 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:36:55,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:36:55,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:36:55,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:36:55,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:36:55,605 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:36:55,608 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:36:55,609 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:36:55,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:36:55,614 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:36:55,620 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:36:55,623 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:36:55,623 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:36:55,624 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:36:55,626 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:36:55,627 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:36:55,627 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:36:55,628 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:36:55,630 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:36:55,631 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:36:55,632 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:36:55,633 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:36:55,634 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:36:55,634 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:36:55,634 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:36:55,636 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:36:55,637 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:36:55,638 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-11-02 20:36:55,679 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:36:55,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:36:55,680 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:36:55,681 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:36:55,682 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:36:55,682 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:36:55,683 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:36:55,684 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:36:55,684 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:36:55,684 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:36:55,685 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:36:55,685 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:36:55,686 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:36:55,686 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:36:55,686 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:36:55,687 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:36:55,687 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-02 20:36:55,687 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-02 20:36:55,687 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-02 20:36:55,687 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:36:55,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:36:55,688 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:36:55,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:36:55,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:36:55,688 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:36:55,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:36:55,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:36:55,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:36:55,690 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:36:55,690 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:36:55,690 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-02 20:36:55,690 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-02 20:36:55,691 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:36:55,691 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:36:55,691 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:36:55,691 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-02 20:36:55,692 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_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fac7e7835446ac69229cd712eb8181e46fef468b0e6881ccc6e306adaaef48bd [2022-11-02 20:36:56,094 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:36:56,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:36:56,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:36:56,124 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:36:56,129 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:36:56,130 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/combinations/gcd_4+newton_3_3.i [2022-11-02 20:36:56,200 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/data/f2f776d1d/15a20f00f88d4328a50a5b7df9198d5a/FLAG7ef850202 [2022-11-02 20:36:56,799 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:36:56,799 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/sv-benchmarks/c/combinations/gcd_4+newton_3_3.i [2022-11-02 20:36:56,809 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/data/f2f776d1d/15a20f00f88d4328a50a5b7df9198d5a/FLAG7ef850202 [2022-11-02 20:36:57,163 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/data/f2f776d1d/15a20f00f88d4328a50a5b7df9198d5a [2022-11-02 20:36:57,168 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:36:57,171 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:36:57,176 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:36:57,176 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:36:57,180 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:36:57,182 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:36:57" (1/1) ... [2022-11-02 20:36:57,184 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e35a76a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:57, skipping insertion in model container [2022-11-02 20:36:57,185 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:36:57" (1/1) ... [2022-11-02 20:36:57,192 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:36:57,220 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:36:57,384 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_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/sv-benchmarks/c/combinations/gcd_4+newton_3_3.i[1224,1237] [2022-11-02 20:36:57,412 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_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/sv-benchmarks/c/combinations/gcd_4+newton_3_3.i[2848,2861] [2022-11-02 20:36:57,428 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:36:57,440 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:36:57,463 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_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/sv-benchmarks/c/combinations/gcd_4+newton_3_3.i[1224,1237] [2022-11-02 20:36:57,496 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_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/sv-benchmarks/c/combinations/gcd_4+newton_3_3.i[2848,2861] [2022-11-02 20:36:57,497 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:36:57,513 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:36:57,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:57 WrapperNode [2022-11-02 20:36:57,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:36:57,520 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:36:57,520 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:36:57,520 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:36:57,528 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:57" (1/1) ... [2022-11-02 20:36:57,549 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:57" (1/1) ... [2022-11-02 20:36:57,574 INFO L138 Inliner]: procedures = 28, calls = 20, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 74 [2022-11-02 20:36:57,575 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:36:57,575 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:36:57,575 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:36:57,576 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:36:57,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:57" (1/1) ... [2022-11-02 20:36:57,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:57" (1/1) ... [2022-11-02 20:36:57,588 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:57" (1/1) ... [2022-11-02 20:36:57,588 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:57" (1/1) ... [2022-11-02 20:36:57,595 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:57" (1/1) ... [2022-11-02 20:36:57,599 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:57" (1/1) ... [2022-11-02 20:36:57,601 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:57" (1/1) ... [2022-11-02 20:36:57,602 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:57" (1/1) ... [2022-11-02 20:36:57,605 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:36:57,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:36:57,606 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:36:57,606 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:36:57,607 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:57" (1/1) ... [2022-11-02 20:36:57,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:36:57,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:36:57,654 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:36:57,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:36:57,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:36:57,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-02 20:36:57,701 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2022-11-02 20:36:57,701 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2022-11-02 20:36:57,701 INFO L130 BoogieDeclarations]: Found specification of procedure f [2022-11-02 20:36:57,701 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2022-11-02 20:36:57,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:36:57,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:36:57,701 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-02 20:36:57,701 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-02 20:36:57,799 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:36:57,803 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:37:08,224 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:37:08,232 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:37:08,233 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 20:37:08,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:37:08 BoogieIcfgContainer [2022-11-02 20:37:08,236 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:37:08,239 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:37:08,239 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:37:08,243 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:37:08,243 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:36:57" (1/3) ... [2022-11-02 20:37:08,244 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b1b1cf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:37:08, skipping insertion in model container [2022-11-02 20:37:08,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:36:57" (2/3) ... [2022-11-02 20:37:08,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b1b1cf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:37:08, skipping insertion in model container [2022-11-02 20:37:08,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:37:08" (3/3) ... [2022-11-02 20:37:08,247 INFO L112 eAbstractionObserver]: Analyzing ICFG gcd_4+newton_3_3.i [2022-11-02 20:37:08,269 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:37:08,270 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-02 20:37:08,350 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:37:08,362 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;@319d2bac, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:37:08,362 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-02 20:37:08,367 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-02 20:37:08,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-02 20:37:08,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:37:08,378 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:37:08,379 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:37:08,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:37:08,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1780387208, now seen corresponding path program 1 times [2022-11-02 20:37:08,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:37:08,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [342412245] [2022-11-02 20:37:08,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:08,404 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:37:08,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:37:08,412 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:37:08,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-02 20:37:08,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:37:08,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:37:08,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:37:08,701 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 20:37:08,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:37:08,703 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:37:08,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [342412245] [2022-11-02 20:37:08,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [342412245] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:37:08,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:37:08,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:37:08,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013270653] [2022-11-02 20:37:08,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:37:08,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:37:08,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:37:08,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:37:08,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:37:08,761 INFO L87 Difference]: Start difference. First operand has 46 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 33 states have internal predecessors, (43), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:08,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:37:08,866 INFO L93 Difference]: Finished difference Result 99 states and 137 transitions. [2022-11-02 20:37:08,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:37:08,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-02 20:37:08,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:37:08,876 INFO L225 Difference]: With dead ends: 99 [2022-11-02 20:37:08,876 INFO L226 Difference]: Without dead ends: 46 [2022-11-02 20:37:08,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:37:08,883 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 13 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:37:08,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 100 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:37:08,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-02 20:37:08,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2022-11-02 20:37:08,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 20:37:08,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2022-11-02 20:37:08,928 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 11 [2022-11-02 20:37:08,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:37:08,929 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2022-11-02 20:37:08,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:08,929 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2022-11-02 20:37:08,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-02 20:37:08,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:37:08,931 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:37:08,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:37:09,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:37:09,137 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:37:09,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:37:09,137 INFO L85 PathProgramCache]: Analyzing trace with hash 413718792, now seen corresponding path program 1 times [2022-11-02 20:37:09,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:37:09,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1755231416] [2022-11-02 20:37:09,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:09,139 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:37:09,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:37:09,140 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:37:09,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-02 20:37:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:37:09,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:37:09,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:37:09,319 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 20:37:09,319 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:37:09,319 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:37:09,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1755231416] [2022-11-02 20:37:09,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1755231416] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:37:09,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:37:09,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:37:09,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331694476] [2022-11-02 20:37:09,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:37:09,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:37:09,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:37:09,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:37:09,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:37:09,323 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:09,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:37:09,399 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2022-11-02 20:37:09,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:37:09,402 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-02 20:37:09,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:37:09,403 INFO L225 Difference]: With dead ends: 55 [2022-11-02 20:37:09,404 INFO L226 Difference]: Without dead ends: 41 [2022-11-02 20:37:09,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:37:09,406 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 4 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:37:09,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 80 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:37:09,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-02 20:37:09,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-02 20:37:09,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 20:37:09,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-11-02 20:37:09,417 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 13 [2022-11-02 20:37:09,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:37:09,417 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-11-02 20:37:09,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:09,418 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-11-02 20:37:09,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-02 20:37:09,419 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:37:09,419 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:37:09,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:37:09,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:37:09,623 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:37:09,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:37:09,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1714945339, now seen corresponding path program 1 times [2022-11-02 20:37:09,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:37:09,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [685183667] [2022-11-02 20:37:09,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:09,625 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:37:09,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:37:09,626 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:37:09,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-02 20:37:09,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:37:09,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:37:09,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:37:09,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:37:09,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:37:09,989 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:37:09,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [685183667] [2022-11-02 20:37:09,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [685183667] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:37:09,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:37:09,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:37:09,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244967103] [2022-11-02 20:37:09,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:37:09,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:37:09,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:37:09,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:37:09,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:37:09,993 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:10,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:37:10,118 INFO L93 Difference]: Finished difference Result 56 states and 68 transitions. [2022-11-02 20:37:10,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:37:10,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-11-02 20:37:10,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:37:10,120 INFO L225 Difference]: With dead ends: 56 [2022-11-02 20:37:10,120 INFO L226 Difference]: Without dead ends: 43 [2022-11-02 20:37:10,121 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:37:10,122 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:37:10,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 78 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:37:10,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-02 20:37:10,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-02 20:37:10,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 20:37:10,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2022-11-02 20:37:10,136 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 15 [2022-11-02 20:37:10,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:37:10,136 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2022-11-02 20:37:10,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:10,137 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2022-11-02 20:37:10,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 20:37:10,138 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:37:10,138 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:37:10,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:37:10,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:37:10,360 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:37:10,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:37:10,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1030187394, now seen corresponding path program 1 times [2022-11-02 20:37:10,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:37:10,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [51682194] [2022-11-02 20:37:10,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:37:10,361 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:37:10,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:37:10,363 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:37:10,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-02 20:37:10,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:37:10,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 20:37:10,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:37:10,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:37:10,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:37:11,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:37:11,099 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:37:11,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [51682194] [2022-11-02 20:37:11,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [51682194] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:37:11,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:37:11,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-11-02 20:37:11,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266907800] [2022-11-02 20:37:11,101 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:37:11,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:37:11,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:37:11,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:37:11,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:37:11,103 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:11,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:37:11,321 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2022-11-02 20:37:11,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:37:11,325 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-11-02 20:37:11,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:37:11,326 INFO L225 Difference]: With dead ends: 60 [2022-11-02 20:37:11,327 INFO L226 Difference]: Without dead ends: 47 [2022-11-02 20:37:11,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:37:11,328 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:37:11,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 115 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:37:11,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-02 20:37:11,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-02 20:37:11,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 20:37:11,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-11-02 20:37:11,351 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 17 [2022-11-02 20:37:11,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:37:11,352 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-11-02 20:37:11,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:11,355 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-11-02 20:37:11,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-02 20:37:11,357 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:37:11,358 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:37:11,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:37:11,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:37:11,574 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:37:11,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:37:11,575 INFO L85 PathProgramCache]: Analyzing trace with hash -626272964, now seen corresponding path program 2 times [2022-11-02 20:37:11,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:37:11,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2137717668] [2022-11-02 20:37:11,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:37:11,576 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:37:11,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:37:11,577 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:37:11,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-02 20:37:11,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:37:11,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:37:11,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:37:11,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:37:13,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:37:13,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:37:23,145 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:37:23,146 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:37:23,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2137717668] [2022-11-02 20:37:23,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2137717668] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:37:23,147 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:37:23,147 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-11-02 20:37:23,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186376928] [2022-11-02 20:37:23,147 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:37:23,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:37:23,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:37:23,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:37:23,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:37:23,150 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:37:50,178 WARN L234 SmtUtils]: Spent 9.25s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:38:07,482 WARN L234 SmtUtils]: Spent 10.09s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:38:27,738 WARN L234 SmtUtils]: Spent 10.94s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:38:33,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 20:38:34,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:38:34,937 INFO L93 Difference]: Finished difference Result 71 states and 88 transitions. [2022-11-02 20:38:34,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-02 20:38:34,971 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-02 20:38:34,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:38:34,973 INFO L225 Difference]: With dead ends: 71 [2022-11-02 20:38:34,973 INFO L226 Difference]: Without dead ends: 68 [2022-11-02 20:38:34,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 70.3s TimeCoverageRelationStatistics Valid=118, Invalid=530, Unknown=2, NotChecked=0, Total=650 [2022-11-02 20:38:34,975 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 34 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:38:34,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 406 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 10.6s Time] [2022-11-02 20:38:34,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-02 20:38:35,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-11-02 20:38:35,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 52 states have internal predecessors, (59), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-02 20:38:35,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2022-11-02 20:38:35,015 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 21 [2022-11-02 20:38:35,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:38:35,015 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2022-11-02 20:38:35,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:38:35,016 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2022-11-02 20:38:35,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-02 20:38:35,018 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:38:35,018 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:38:35,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2022-11-02 20:38:35,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:38:35,235 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:38:35,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:38:35,236 INFO L85 PathProgramCache]: Analyzing trace with hash -311360839, now seen corresponding path program 3 times [2022-11-02 20:38:35,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:38:35,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2085989167] [2022-11-02 20:38:35,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:38:35,237 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:38:35,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:38:35,238 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:38:35,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-02 20:38:35,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 20:38:35,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:38:35,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 20:38:35,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:38:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-02 20:38:35,380 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:38:35,381 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:38:35,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2085989167] [2022-11-02 20:38:35,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2085989167] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:38:35,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:38:35,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:38:35,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001290370] [2022-11-02 20:38:35,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:38:35,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 20:38:35,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:38:35,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 20:38:35,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:38:35,384 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:38:35,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:38:35,459 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2022-11-02 20:38:35,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 20:38:35,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-11-02 20:38:35,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:38:35,463 INFO L225 Difference]: With dead ends: 78 [2022-11-02 20:38:35,463 INFO L226 Difference]: Without dead ends: 67 [2022-11-02 20:38:35,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 20:38:35,465 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 3 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:38:35,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 80 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:38:35,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-11-02 20:38:35,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-11-02 20:38:35,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 50 states have internal predecessors, (55), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-02 20:38:35,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-11-02 20:38:35,481 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 23 [2022-11-02 20:38:35,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:38:35,481 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-11-02 20:38:35,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:38:35,482 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-11-02 20:38:35,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-02 20:38:35,483 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:38:35,483 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:38:35,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:38:35,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:38:35,696 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:38:35,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:38:35,697 INFO L85 PathProgramCache]: Analyzing trace with hash 603968502, now seen corresponding path program 4 times [2022-11-02 20:38:35,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:38:35,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [504619862] [2022-11-02 20:38:35,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:38:35,697 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:38:35,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:38:35,698 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:38:35,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-02 20:38:35,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:38:35,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:38:35,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 20:38:35,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:38:36,540 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:38:36,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:38:37,546 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:38:37,546 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:38:37,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [504619862] [2022-11-02 20:38:37,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [504619862] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:38:37,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:38:37,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-02 20:38:37,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741171991] [2022-11-02 20:38:37,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:38:37,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:38:37,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:38:37,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:38:37,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:38:37,549 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:38:38,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:38:38,486 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2022-11-02 20:38:38,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:38:38,496 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-11-02 20:38:38,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:38:38,497 INFO L225 Difference]: With dead ends: 88 [2022-11-02 20:38:38,497 INFO L226 Difference]: Without dead ends: 64 [2022-11-02 20:38:38,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:38:38,499 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 12 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:38:38,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 263 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-02 20:38:38,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-11-02 20:38:38,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2022-11-02 20:38:38,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 46 states have internal predecessors, (50), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-02 20:38:38,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 70 transitions. [2022-11-02 20:38:38,513 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 70 transitions. Word has length 25 [2022-11-02 20:38:38,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:38:38,513 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 70 transitions. [2022-11-02 20:38:38,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 10 states have internal predecessors, (35), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:38:38,514 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 70 transitions. [2022-11-02 20:38:38,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-02 20:38:38,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:38:38,515 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:38:38,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:38:38,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:38:38,728 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:38:38,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:38:38,729 INFO L85 PathProgramCache]: Analyzing trace with hash 225362363, now seen corresponding path program 1 times [2022-11-02 20:38:38,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:38:38,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412359092] [2022-11-02 20:38:38,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:38:38,729 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:38:38,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:38:38,730 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:38:38,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-02 20:38:38,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:38:38,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 20:38:38,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:38:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 20:38:39,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:38:40,403 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:38:40,404 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:38:40,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412359092] [2022-11-02 20:38:40,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412359092] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:38:40,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:38:40,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-11-02 20:38:40,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39611886] [2022-11-02 20:38:40,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:38:40,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 20:38:40,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:38:40,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 20:38:40,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-02 20:38:40,406 INFO L87 Difference]: Start difference. First operand 60 states and 70 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:38:41,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:38:41,221 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2022-11-02 20:38:41,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:38:41,223 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2022-11-02 20:38:41,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:38:41,224 INFO L225 Difference]: With dead ends: 74 [2022-11-02 20:38:41,224 INFO L226 Difference]: Without dead ends: 60 [2022-11-02 20:38:41,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-11-02 20:38:41,225 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 15 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:38:41,226 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 264 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 63 Invalid, 0 Unknown, 14 Unchecked, 0.5s Time] [2022-11-02 20:38:41,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-11-02 20:38:41,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-11-02 20:38:41,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 46 states have internal predecessors, (49), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-02 20:38:41,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2022-11-02 20:38:41,246 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 26 [2022-11-02 20:38:41,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:38:41,247 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2022-11-02 20:38:41,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 12 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:38:41,247 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2022-11-02 20:38:41,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-11-02 20:38:41,249 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:38:41,249 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:38:41,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-02 20:38:41,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:38:41,452 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:38:41,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:38:41,453 INFO L85 PathProgramCache]: Analyzing trace with hash -334589841, now seen corresponding path program 5 times [2022-11-02 20:38:41,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:38:41,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2132084391] [2022-11-02 20:38:41,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 20:38:41,454 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:38:41,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:38:41,455 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:38:41,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-02 20:38:41,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-11-02 20:38:41,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:38:41,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 20:38:41,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:38:42,719 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:38:42,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:38:45,871 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-02 20:38:45,871 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:38:45,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2132084391] [2022-11-02 20:38:45,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2132084391] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:38:45,872 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:38:45,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2022-11-02 20:38:45,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156061758] [2022-11-02 20:38:45,872 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:38:45,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 20:38:45,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:38:45,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 20:38:45,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:38:45,874 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:38:46,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:38:46,768 INFO L93 Difference]: Finished difference Result 75 states and 84 transitions. [2022-11-02 20:38:46,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 20:38:46,776 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-11-02 20:38:46,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:38:46,776 INFO L225 Difference]: With dead ends: 75 [2022-11-02 20:38:46,777 INFO L226 Difference]: Without dead ends: 49 [2022-11-02 20:38:46,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:38:46,778 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 11 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:38:46,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 307 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-02 20:38:46,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-02 20:38:46,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-02 20:38:46,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-02 20:38:46,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-11-02 20:38:46,790 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 27 [2022-11-02 20:38:46,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:38:46,791 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-11-02 20:38:46,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 20:38:46,791 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-11-02 20:38:46,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 20:38:46,792 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:38:46,792 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:38:46,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-02 20:38:47,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:38:47,009 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:38:47,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:38:47,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1781630816, now seen corresponding path program 2 times [2022-11-02 20:38:47,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:38:47,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [660154078] [2022-11-02 20:38:47,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:38:47,010 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:38:47,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:38:47,012 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:38:47,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-02 20:38:47,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:38:47,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:38:47,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-02 20:38:47,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:38:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:38:48,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:38:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:38:59,791 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-02 20:38:59,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [660154078] [2022-11-02 20:38:59,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [660154078] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:38:59,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:38:59,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-11-02 20:38:59,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176945780] [2022-11-02 20:38:59,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:38:59,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-02 20:38:59,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-02 20:38:59,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-02 20:38:59,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2022-11-02 20:38:59,794 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:39:18,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:39:18,176 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2022-11-02 20:39:18,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 20:39:18,177 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-11-02 20:39:18,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:39:18,177 INFO L225 Difference]: With dead ends: 49 [2022-11-02 20:39:18,178 INFO L226 Difference]: Without dead ends: 23 [2022-11-02 20:39:18,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-11-02 20:39:18,179 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 14 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-11-02 20:39:18,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 389 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-11-02 20:39:18,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-02 20:39:18,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-02 20:39:18,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 14 states have (on average 1.0) internal successors, (14), 14 states have internal predecessors, (14), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:39:18,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-11-02 20:39:18,185 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 28 [2022-11-02 20:39:18,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:39:18,185 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-11-02 20:39:18,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 20:39:18,186 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-11-02 20:39:18,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-11-02 20:39:18,187 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:39:18,187 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:39:18,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2022-11-02 20:39:18,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 [2022-11-02 20:39:18,408 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:39:18,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:39:18,409 INFO L85 PathProgramCache]: Analyzing trace with hash -21288017, now seen corresponding path program 1 times [2022-11-02 20:39:18,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-02 20:39:18,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1088298758] [2022-11-02 20:39:18,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:39:18,410 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-11-02 20:39:18,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat [2022-11-02 20:39:18,412 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-02 20:39:18,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f4ac51a4-080e-45af-aec3-0ec6d0d8345e/bin/uautomizer-Dbtcem3rbc/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process