./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array21_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array21_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro --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 f1a738dced8b73ebc8edf3e480fddcd32bb19127a8255980e93fab5e96705ab3 --- 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-8393723 [2022-11-18 20:00:03,837 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:00:03,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:00:03,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:00:03,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:00:03,889 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:00:03,891 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:00:03,898 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:00:03,900 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:00:03,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:00:03,907 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:00:03,909 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:00:03,910 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:00:03,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:00:03,913 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:00:03,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:00:03,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:00:03,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:00:03,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:00:03,927 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:00:03,929 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:00:03,931 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:00:03,934 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:00:03,935 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:00:03,943 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:00:03,944 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:00:03,944 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:00:03,946 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:00:03,947 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:00:03,948 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:00:03,948 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:00:03,950 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:00:03,952 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:00:03,954 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:00:03,956 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:00:03,956 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:00:03,957 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:00:03,957 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:00:03,958 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:00:03,959 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:00:03,960 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:00:03,961 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:00:04,005 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:00:04,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:00:04,006 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:00:04,006 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:00:04,007 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:00:04,007 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:00:04,008 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:00:04,008 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:00:04,009 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:00:04,009 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:00:04,010 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:00:04,010 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:00:04,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:00:04,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:00:04,011 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:00:04,011 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:00:04,012 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:00:04,012 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:00:04,012 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:00:04,012 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:00:04,013 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:00:04,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:00:04,013 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:00:04,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:00:04,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:00:04,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:00:04,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:00:04,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:00:04,015 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:00:04,015 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:00:04,015 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:00:04,015 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:00:04,016 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:00:04,016 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_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1a738dced8b73ebc8edf3e480fddcd32bb19127a8255980e93fab5e96705ab3 [2022-11-18 20:00:04,310 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:00:04,340 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:00:04,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:00:04,345 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:00:04,346 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:00:04,347 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/array-patterns/array21_pattern.c [2022-11-18 20:00:04,419 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/data/1a969317b/80aa135b440d4560b303dd060ebc3de2/FLAG0d150604f [2022-11-18 20:00:04,965 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:00:04,966 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/sv-benchmarks/c/array-patterns/array21_pattern.c [2022-11-18 20:00:04,974 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/data/1a969317b/80aa135b440d4560b303dd060ebc3de2/FLAG0d150604f [2022-11-18 20:00:05,302 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/data/1a969317b/80aa135b440d4560b303dd060ebc3de2 [2022-11-18 20:00:05,306 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:00:05,310 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:00:05,313 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:00:05,313 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:00:05,317 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:00:05,318 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:00:05" (1/1) ... [2022-11-18 20:00:05,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e30fc72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:05, skipping insertion in model container [2022-11-18 20:00:05,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:00:05" (1/1) ... [2022-11-18 20:00:05,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:00:05,347 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:00:05,578 WARN L234 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_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/sv-benchmarks/c/array-patterns/array21_pattern.c[1340,1353] [2022-11-18 20:00:05,626 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:00:05,639 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:00:05,666 WARN L234 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_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/sv-benchmarks/c/array-patterns/array21_pattern.c[1340,1353] [2022-11-18 20:00:05,686 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:00:05,707 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:00:05,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:05 WrapperNode [2022-11-18 20:00:05,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:00:05,709 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:00:05,709 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:00:05,709 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:00:05,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:05" (1/1) ... [2022-11-18 20:00:05,740 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:05" (1/1) ... [2022-11-18 20:00:05,775 INFO L138 Inliner]: procedures = 17, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 105 [2022-11-18 20:00:05,775 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:00:05,776 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:00:05,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:00:05,777 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:00:05,786 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:05" (1/1) ... [2022-11-18 20:00:05,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:05" (1/1) ... [2022-11-18 20:00:05,792 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:05" (1/1) ... [2022-11-18 20:00:05,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:05" (1/1) ... [2022-11-18 20:00:05,807 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:05" (1/1) ... [2022-11-18 20:00:05,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:05" (1/1) ... [2022-11-18 20:00:05,823 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:05" (1/1) ... [2022-11-18 20:00:05,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:05" (1/1) ... [2022-11-18 20:00:05,827 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:00:05,831 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:00:05,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:00:05,832 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:00:05,833 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:05" (1/1) ... [2022-11-18 20:00:05,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:00:05,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:00:05,872 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:00:05,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:00:05,926 INFO L130 BoogieDeclarations]: Found specification of procedure outerBoundaryPatternCheck [2022-11-18 20:00:05,926 INFO L138 BoogieDeclarations]: Found implementation of procedure outerBoundaryPatternCheck [2022-11-18 20:00:05,927 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:00:05,927 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-18 20:00:05,927 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-18 20:00:05,927 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:00:05,928 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:00:05,928 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:00:05,928 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:00:05,928 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:00:05,928 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 20:00:05,929 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:00:06,044 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:00:06,046 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:00:06,289 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:00:06,296 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:00:06,297 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-11-18 20:00:06,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:00:06 BoogieIcfgContainer [2022-11-18 20:00:06,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:00:06,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:00:06,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:00:06,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:00:06,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:00:05" (1/3) ... [2022-11-18 20:00:06,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ba8bd54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:00:06, skipping insertion in model container [2022-11-18 20:00:06,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:00:05" (2/3) ... [2022-11-18 20:00:06,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ba8bd54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:00:06, skipping insertion in model container [2022-11-18 20:00:06,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:00:06" (3/3) ... [2022-11-18 20:00:06,309 INFO L112 eAbstractionObserver]: Analyzing ICFG array21_pattern.c [2022-11-18 20:00:06,352 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:00:06,353 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:00:06,433 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:00:06,445 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;@5900cde2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:00:06,445 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-18 20:00:06,450 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 32 states have internal predecessors, (48), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-18 20:00:06,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-18 20:00:06,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:06,459 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:06,460 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:00:06,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:06,470 INFO L85 PathProgramCache]: Analyzing trace with hash 2136211159, now seen corresponding path program 1 times [2022-11-18 20:00:06,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:00:06,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861818195] [2022-11-18 20:00:06,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:06,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:00:06,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:06,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:00:06,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861818195] [2022-11-18 20:00:06,640 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-18 20:00:06,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841071742] [2022-11-18 20:00:06,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:06,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:06,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:00:06,649 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:00:06,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:00:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:06,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-18 20:00:06,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:06,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:00:06,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:00:06,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841071742] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:00:06,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:00:06,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 20:00:06,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925525911] [2022-11-18 20:00:06,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:00:06,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 20:00:06,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:00:06,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 20:00:06,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:00:06,833 INFO L87 Difference]: Start difference. First operand has 40 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 32 states have internal predecessors, (48), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-18 20:00:06,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:06,862 INFO L93 Difference]: Finished difference Result 77 states and 115 transitions. [2022-11-18 20:00:06,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 20:00:06,865 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-11-18 20:00:06,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:06,876 INFO L225 Difference]: With dead ends: 77 [2022-11-18 20:00:06,876 INFO L226 Difference]: Without dead ends: 36 [2022-11-18 20:00:06,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 20:00:06,884 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:06,886 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:00:06,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-18 20:00:06,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-18 20:00:06,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-18 20:00:06,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2022-11-18 20:00:06,928 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 15 [2022-11-18 20:00:06,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:06,928 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2022-11-18 20:00:06,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-18 20:00:06,929 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2022-11-18 20:00:06,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-18 20:00:06,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:06,931 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2022-11-18 20:00:06,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:00:07,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-18 20:00:07,138 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:00:07,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:07,139 INFO L85 PathProgramCache]: Analyzing trace with hash -699940082, now seen corresponding path program 1 times [2022-11-18 20:00:07,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:00:07,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73055053] [2022-11-18 20:00:07,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:07,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:00:07,158 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:00:07,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [914886967] [2022-11-18 20:00:07,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:07,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:07,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:00:07,160 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:00:07,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:00:07,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:07,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 20:00:07,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:07,403 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:00:07,403 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:00:07,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:00:07,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73055053] [2022-11-18 20:00:07,404 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:00:07,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914886967] [2022-11-18 20:00:07,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914886967] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:00:07,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:00:07,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 20:00:07,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940633879] [2022-11-18 20:00:07,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:00:07,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:00:07,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:00:07,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:00:07,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:00:07,408 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:00:07,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:07,593 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2022-11-18 20:00:07,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:00:07,594 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-11-18 20:00:07,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:07,595 INFO L225 Difference]: With dead ends: 76 [2022-11-18 20:00:07,595 INFO L226 Difference]: Without dead ends: 48 [2022-11-18 20:00:07,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-18 20:00:07,597 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 60 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:07,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 89 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:00:07,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-18 20:00:07,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2022-11-18 20:00:07,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-18 20:00:07,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2022-11-18 20:00:07,608 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 35 [2022-11-18 20:00:07,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:07,608 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2022-11-18 20:00:07,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:00:07,609 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2022-11-18 20:00:07,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-18 20:00:07,610 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:07,610 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:07,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:00:07,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:07,816 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:00:07,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:07,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1308831759, now seen corresponding path program 1 times [2022-11-18 20:00:07,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:00:07,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109663499] [2022-11-18 20:00:07,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:07,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:00:07,833 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:00:07,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [124982037] [2022-11-18 20:00:07,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:07,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:07,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:00:07,836 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:00:07,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:00:07,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:07,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:00:07,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:00:07,961 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:00:07,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:00:07,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109663499] [2022-11-18 20:00:07,962 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:00:07,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124982037] [2022-11-18 20:00:07,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124982037] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:00:07,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:00:07,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 20:00:07,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004490611] [2022-11-18 20:00:07,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:00:07,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 20:00:07,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:00:07,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 20:00:07,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 20:00:07,965 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:00:08,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:08,026 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2022-11-18 20:00:08,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 20:00:08,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2022-11-18 20:00:08,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:08,028 INFO L225 Difference]: With dead ends: 79 [2022-11-18 20:00:08,028 INFO L226 Difference]: Without dead ends: 46 [2022-11-18 20:00:08,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:00:08,030 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 29 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:08,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 76 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:00:08,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-18 20:00:08,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2022-11-18 20:00:08,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-18 20:00:08,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2022-11-18 20:00:08,040 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 41 [2022-11-18 20:00:08,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:08,040 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2022-11-18 20:00:08,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:00:08,041 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2022-11-18 20:00:08,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-11-18 20:00:08,042 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:08,042 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:08,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:00:08,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:08,248 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:00:08,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:08,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1300942485, now seen corresponding path program 1 times [2022-11-18 20:00:08,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:00:08,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613086848] [2022-11-18 20:00:08,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:08,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:00:08,264 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:00:08,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024505036] [2022-11-18 20:00:08,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:08,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:08,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:00:08,276 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:00:08,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:00:08,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:08,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:00:08,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:08,513 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-18 20:00:08,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:00:08,797 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 20:00:08,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:00:08,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613086848] [2022-11-18 20:00:08,798 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:00:08,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024505036] [2022-11-18 20:00:08,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024505036] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:00:08,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:00:08,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-11-18 20:00:08,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60131865] [2022-11-18 20:00:08,799 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:00:08,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:00:08,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:00:08,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:00:08,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:00:08,801 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-18 20:00:09,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:09,080 INFO L93 Difference]: Finished difference Result 85 states and 105 transitions. [2022-11-18 20:00:09,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:00:09,081 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 45 [2022-11-18 20:00:09,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:09,082 INFO L225 Difference]: With dead ends: 85 [2022-11-18 20:00:09,083 INFO L226 Difference]: Without dead ends: 50 [2022-11-18 20:00:09,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2022-11-18 20:00:09,085 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 89 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:09,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 105 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:00:09,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-18 20:00:09,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-11-18 20:00:09,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-18 20:00:09,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2022-11-18 20:00:09,095 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 45 [2022-11-18 20:00:09,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:09,095 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2022-11-18 20:00:09,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-18 20:00:09,096 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2022-11-18 20:00:09,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-18 20:00:09,097 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:09,097 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:09,110 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:00:09,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:09,303 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:00:09,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:09,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1544610617, now seen corresponding path program 2 times [2022-11-18 20:00:09,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:00:09,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587997667] [2022-11-18 20:00:09,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:09,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:00:09,323 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:00:09,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1150099407] [2022-11-18 20:00:09,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:00:09,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:09,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:00:09,339 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:00:09,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:00:09,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:00:09,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:00:09,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:00:09,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:09,495 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-18 20:00:09,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:00:09,560 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-18 20:00:09,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:00:09,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587997667] [2022-11-18 20:00:09,560 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:00:09,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150099407] [2022-11-18 20:00:09,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150099407] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:00:09,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:00:09,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-11-18 20:00:09,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361191873] [2022-11-18 20:00:09,561 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:00:09,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-18 20:00:09,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:00:09,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-18 20:00:09,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-18 20:00:09,563 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-18 20:00:09,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:09,790 INFO L93 Difference]: Finished difference Result 106 states and 128 transitions. [2022-11-18 20:00:09,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:00:09,791 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 49 [2022-11-18 20:00:09,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:09,795 INFO L225 Difference]: With dead ends: 106 [2022-11-18 20:00:09,796 INFO L226 Difference]: Without dead ends: 74 [2022-11-18 20:00:09,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:00:09,806 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 64 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:09,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 154 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:00:09,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-11-18 20:00:09,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2022-11-18 20:00:09,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 states have internal predecessors, (63), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-18 20:00:09,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2022-11-18 20:00:09,825 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 49 [2022-11-18 20:00:09,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:09,826 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2022-11-18 20:00:09,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-18 20:00:09,826 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2022-11-18 20:00:09,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-18 20:00:09,828 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:09,828 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:09,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:00:10,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:10,036 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:00:10,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:10,037 INFO L85 PathProgramCache]: Analyzing trace with hash -725408594, now seen corresponding path program 3 times [2022-11-18 20:00:10,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:00:10,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253319175] [2022-11-18 20:00:10,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:10,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:00:10,057 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:00:10,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832621566] [2022-11-18 20:00:10,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:00:10,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:10,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:00:10,058 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:00:10,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:00:10,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-18 20:00:10,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:00:10,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-18 20:00:10,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:10,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-18 20:00:10,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2022-11-18 20:00:10,945 INFO L321 Elim1Store]: treesize reduction 42, result has 49.4 percent of original size [2022-11-18 20:00:10,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 63 [2022-11-18 20:00:11,198 INFO L321 Elim1Store]: treesize reduction 98, result has 14.8 percent of original size [2022-11-18 20:00:11,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 54 treesize of output 59 [2022-11-18 20:00:12,947 INFO L321 Elim1Store]: treesize reduction 139, result has 40.3 percent of original size [2022-11-18 20:00:12,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 122 [2022-11-18 20:00:18,173 INFO L321 Elim1Store]: treesize reduction 736, result has 3.3 percent of original size [2022-11-18 20:00:18,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 277 treesize of output 112 [2022-11-18 20:00:18,819 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:00:18,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:00:20,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:00:20,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253319175] [2022-11-18 20:00:20,868 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:00:20,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832621566] [2022-11-18 20:00:20,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832621566] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:00:20,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:00:20,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2022-11-18 20:00:20,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705379104] [2022-11-18 20:00:20,869 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 20:00:20,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-18 20:00:20,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:00:20,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-18 20:00:20,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=3086, Unknown=0, NotChecked=0, Total=3660 [2022-11-18 20:00:20,875 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 41 states, 40 states have (on average 1.3) internal successors, (52), 40 states have internal predecessors, (52), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-18 20:00:22,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:22,024 INFO L93 Difference]: Finished difference Result 158 states and 200 transitions. [2022-11-18 20:00:22,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-18 20:00:22,025 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.3) internal successors, (52), 40 states have internal predecessors, (52), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 63 [2022-11-18 20:00:22,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:22,029 INFO L225 Difference]: With dead ends: 158 [2022-11-18 20:00:22,029 INFO L226 Difference]: Without dead ends: 154 [2022-11-18 20:00:22,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1771 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=645, Invalid=3515, Unknown=0, NotChecked=0, Total=4160 [2022-11-18 20:00:22,032 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 163 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 293 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:22,033 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 352 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 520 Invalid, 0 Unknown, 293 Unchecked, 0.7s Time] [2022-11-18 20:00:22,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-11-18 20:00:22,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 105. [2022-11-18 20:00:22,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 91 states have (on average 1.2087912087912087) internal successors, (110), 91 states have internal predecessors, (110), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-11-18 20:00:22,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 127 transitions. [2022-11-18 20:00:22,066 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 127 transitions. Word has length 63 [2022-11-18 20:00:22,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:22,066 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 127 transitions. [2022-11-18 20:00:22,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.3) internal successors, (52), 40 states have internal predecessors, (52), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-18 20:00:22,067 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 127 transitions. [2022-11-18 20:00:22,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-18 20:00:22,069 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:22,069 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:22,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 20:00:22,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:22,279 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:00:22,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:22,280 INFO L85 PathProgramCache]: Analyzing trace with hash 236205423, now seen corresponding path program 1 times [2022-11-18 20:00:22,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:00:22,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330346057] [2022-11-18 20:00:22,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:22,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:00:22,297 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:00:22,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104470934] [2022-11-18 20:00:22,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:22,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:22,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:00:22,299 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:00:22,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:00:22,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:22,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:00:22,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:22,418 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-18 20:00:22,418 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:00:22,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:00:22,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330346057] [2022-11-18 20:00:22,419 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:00:22,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104470934] [2022-11-18 20:00:22,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104470934] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:00:22,421 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:00:22,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:00:22,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300415421] [2022-11-18 20:00:22,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:00:22,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:00:22,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:00:22,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:00:22,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:00:22,424 INFO L87 Difference]: Start difference. First operand 105 states and 127 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 20:00:22,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:22,496 INFO L93 Difference]: Finished difference Result 155 states and 190 transitions. [2022-11-18 20:00:22,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:00:22,496 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 63 [2022-11-18 20:00:22,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:22,500 INFO L225 Difference]: With dead ends: 155 [2022-11-18 20:00:22,501 INFO L226 Difference]: Without dead ends: 116 [2022-11-18 20:00:22,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:00:22,505 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 5 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:22,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 194 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:00:22,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-11-18 20:00:22,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2022-11-18 20:00:22,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 94 states have (on average 1.202127659574468) internal successors, (113), 94 states have internal predecessors, (113), 8 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2022-11-18 20:00:22,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2022-11-18 20:00:22,566 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 63 [2022-11-18 20:00:22,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:22,567 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2022-11-18 20:00:22,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 20:00:22,567 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2022-11-18 20:00:22,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-11-18 20:00:22,576 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:22,577 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:22,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-18 20:00:22,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:22,792 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:00:22,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:22,793 INFO L85 PathProgramCache]: Analyzing trace with hash -1172698608, now seen corresponding path program 4 times [2022-11-18 20:00:22,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:00:22,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708341174] [2022-11-18 20:00:22,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:22,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:00:22,819 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:00:22,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1351465394] [2022-11-18 20:00:22,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:00:22,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:22,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:00:22,821 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:00:22,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:00:22,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:00:22,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:00:22,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:00:22,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:23,033 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-18 20:00:23,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:00:23,144 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 19 proven. 30 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-11-18 20:00:23,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:00:23,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708341174] [2022-11-18 20:00:23,145 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:00:23,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351465394] [2022-11-18 20:00:23,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351465394] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:00:23,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:00:23,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-18 20:00:23,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021322395] [2022-11-18 20:00:23,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:00:23,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:00:23,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:00:23,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:00:23,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:00:23,147 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-18 20:00:23,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:23,430 INFO L93 Difference]: Finished difference Result 304 states and 382 transitions. [2022-11-18 20:00:23,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:00:23,431 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2022-11-18 20:00:23,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:23,432 INFO L225 Difference]: With dead ends: 304 [2022-11-18 20:00:23,433 INFO L226 Difference]: Without dead ends: 216 [2022-11-18 20:00:23,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 114 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-11-18 20:00:23,434 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 197 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:23,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 181 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:00:23,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-11-18 20:00:23,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2022-11-18 20:00:23,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 137 states have (on average 1.1897810218978102) internal successors, (163), 137 states have internal predecessors, (163), 12 states have call successors, (12), 7 states have call predecessors, (12), 9 states have return successors, (17), 14 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-18 20:00:23,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 192 transitions. [2022-11-18 20:00:23,486 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 192 transitions. Word has length 65 [2022-11-18 20:00:23,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:23,487 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 192 transitions. [2022-11-18 20:00:23,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-18 20:00:23,487 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 192 transitions. [2022-11-18 20:00:23,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-18 20:00:23,489 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:23,489 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:23,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-18 20:00:23,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-18 20:00:23,695 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:00:23,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:23,695 INFO L85 PathProgramCache]: Analyzing trace with hash -2109828498, now seen corresponding path program 5 times [2022-11-18 20:00:23,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:00:23,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038257268] [2022-11-18 20:00:23,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:23,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:00:23,710 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:00:23,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [444455988] [2022-11-18 20:00:23,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:00:23,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:23,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:00:23,712 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:00:23,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:00:23,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-11-18 20:00:23,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:00:23,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:00:23,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 34 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-18 20:00:24,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:00:24,134 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-11-18 20:00:24,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:00:24,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038257268] [2022-11-18 20:00:24,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:00:24,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444455988] [2022-11-18 20:00:24,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444455988] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:00:24,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:00:24,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-11-18 20:00:24,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488802362] [2022-11-18 20:00:24,139 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:00:24,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:00:24,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:00:24,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:00:24,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:00:24,142 INFO L87 Difference]: Start difference. First operand 159 states and 192 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-18 20:00:24,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:24,599 INFO L93 Difference]: Finished difference Result 336 states and 405 transitions. [2022-11-18 20:00:24,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-18 20:00:24,600 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 67 [2022-11-18 20:00:24,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:24,601 INFO L225 Difference]: With dead ends: 336 [2022-11-18 20:00:24,602 INFO L226 Difference]: Without dead ends: 225 [2022-11-18 20:00:24,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=573, Unknown=0, NotChecked=0, Total=812 [2022-11-18 20:00:24,603 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 97 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:24,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 129 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:00:24,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-11-18 20:00:24,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 172. [2022-11-18 20:00:24,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 150 states have (on average 1.1933333333333334) internal successors, (179), 150 states have internal predecessors, (179), 12 states have call successors, (12), 7 states have call predecessors, (12), 9 states have return successors, (17), 14 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-18 20:00:24,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 208 transitions. [2022-11-18 20:00:24,654 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 208 transitions. Word has length 67 [2022-11-18 20:00:24,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:24,654 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 208 transitions. [2022-11-18 20:00:24,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-18 20:00:24,655 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 208 transitions. [2022-11-18 20:00:24,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-18 20:00:24,658 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:24,658 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:24,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:00:24,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:24,865 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:00:24,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:24,865 INFO L85 PathProgramCache]: Analyzing trace with hash -834557719, now seen corresponding path program 1 times [2022-11-18 20:00:24,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:00:24,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680558872] [2022-11-18 20:00:24,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:24,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:00:24,889 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:00:24,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1994971018] [2022-11-18 20:00:24,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:24,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:24,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:00:24,892 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:00:24,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:00:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:24,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:00:24,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:25,019 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2022-11-18 20:00:25,020 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:00:25,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:00:25,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680558872] [2022-11-18 20:00:25,020 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:00:25,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994971018] [2022-11-18 20:00:25,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994971018] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:00:25,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:00:25,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:00:25,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172413265] [2022-11-18 20:00:25,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:00:25,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:00:25,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:00:25,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:00:25,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:00:25,024 INFO L87 Difference]: Start difference. First operand 172 states and 208 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:00:25,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:25,096 INFO L93 Difference]: Finished difference Result 283 states and 343 transitions. [2022-11-18 20:00:25,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:00:25,097 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2022-11-18 20:00:25,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:25,101 INFO L225 Difference]: With dead ends: 283 [2022-11-18 20:00:25,101 INFO L226 Difference]: Without dead ends: 178 [2022-11-18 20:00:25,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:00:25,103 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 5 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:25,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 162 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:00:25,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-11-18 20:00:25,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2022-11-18 20:00:25,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 152 states have (on average 1.1644736842105263) internal successors, (177), 152 states have internal predecessors, (177), 12 states have call successors, (12), 7 states have call predecessors, (12), 9 states have return successors, (17), 14 states have call predecessors, (17), 12 states have call successors, (17) [2022-11-18 20:00:25,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 206 transitions. [2022-11-18 20:00:25,158 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 206 transitions. Word has length 69 [2022-11-18 20:00:25,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:25,159 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 206 transitions. [2022-11-18 20:00:25,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-18 20:00:25,159 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 206 transitions. [2022-11-18 20:00:25,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-18 20:00:25,160 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:25,161 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:25,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-18 20:00:25,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-18 20:00:25,366 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:00:25,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:25,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1276732650, now seen corresponding path program 1 times [2022-11-18 20:00:25,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:00:25,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167185107] [2022-11-18 20:00:25,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:25,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:00:25,382 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:00:25,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096326563] [2022-11-18 20:00:25,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:25,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:25,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:00:25,384 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:00:25,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:00:25,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:25,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 20:00:25,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:25,663 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-18 20:00:25,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:00:25,900 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-11-18 20:00:25,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:00:25,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167185107] [2022-11-18 20:00:25,901 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:00:25,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096326563] [2022-11-18 20:00:25,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096326563] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:00:25,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:00:25,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2022-11-18 20:00:25,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815868949] [2022-11-18 20:00:25,902 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:00:25,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 20:00:25,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:00:25,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 20:00:25,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:00:25,903 INFO L87 Difference]: Start difference. First operand 174 states and 206 transitions. Second operand has 17 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 5 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-18 20:00:26,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:26,394 INFO L93 Difference]: Finished difference Result 246 states and 279 transitions. [2022-11-18 20:00:26,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 20:00:26,395 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 5 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 69 [2022-11-18 20:00:26,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:26,396 INFO L225 Difference]: With dead ends: 246 [2022-11-18 20:00:26,396 INFO L226 Difference]: Without dead ends: 200 [2022-11-18 20:00:26,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 118 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2022-11-18 20:00:26,398 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 80 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:26,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 266 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:00:26,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-11-18 20:00:26,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 177. [2022-11-18 20:00:26,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 154 states have (on average 1.1428571428571428) internal successors, (176), 155 states have internal predecessors, (176), 12 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-11-18 20:00:26,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 202 transitions. [2022-11-18 20:00:26,436 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 202 transitions. Word has length 69 [2022-11-18 20:00:26,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:26,436 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 202 transitions. [2022-11-18 20:00:26,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 5 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2022-11-18 20:00:26,437 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 202 transitions. [2022-11-18 20:00:26,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-11-18 20:00:26,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:26,438 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:26,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:00:26,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-18 20:00:26,647 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:00:26,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:26,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1130035513, now seen corresponding path program 6 times [2022-11-18 20:00:26,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:00:26,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478679915] [2022-11-18 20:00:26,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:26,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:00:26,666 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:00:26,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [710131358] [2022-11-18 20:00:26,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:00:26,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:26,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:00:26,668 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:00:26,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:00:26,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-11-18 20:00:26,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:00:26,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:00:26,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 48 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 20:00:26,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:00:27,002 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 32 proven. 20 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-11-18 20:00:27,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:00:27,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478679915] [2022-11-18 20:00:27,002 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:00:27,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710131358] [2022-11-18 20:00:27,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710131358] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:00:27,003 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:00:27,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-11-18 20:00:27,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196038320] [2022-11-18 20:00:27,004 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:00:27,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:00:27,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:00:27,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:00:27,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:00:27,005 INFO L87 Difference]: Start difference. First operand 177 states and 202 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 20:00:27,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:27,302 INFO L93 Difference]: Finished difference Result 276 states and 305 transitions. [2022-11-18 20:00:27,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-18 20:00:27,303 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 70 [2022-11-18 20:00:27,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:27,306 INFO L225 Difference]: With dead ends: 276 [2022-11-18 20:00:27,306 INFO L226 Difference]: Without dead ends: 172 [2022-11-18 20:00:27,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:00:27,307 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 146 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:27,307 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 140 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-18 20:00:27,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-11-18 20:00:27,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 164. [2022-11-18 20:00:27,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 141 states have (on average 1.1134751773049645) internal successors, (157), 142 states have internal predecessors, (157), 12 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-11-18 20:00:27,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 183 transitions. [2022-11-18 20:00:27,340 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 183 transitions. Word has length 70 [2022-11-18 20:00:27,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:27,341 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 183 transitions. [2022-11-18 20:00:27,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 20:00:27,341 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 183 transitions. [2022-11-18 20:00:27,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-18 20:00:27,342 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:27,342 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:27,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:00:27,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:27,548 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:00:27,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:27,549 INFO L85 PathProgramCache]: Analyzing trace with hash -698104178, now seen corresponding path program 7 times [2022-11-18 20:00:27,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:00:27,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680563226] [2022-11-18 20:00:27,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:27,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:00:27,565 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:00:27,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548578796] [2022-11-18 20:00:27,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:00:27,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:27,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:00:27,571 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:00:27,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:00:27,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:27,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 20:00:27,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:27,751 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 42 proven. 40 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-11-18 20:00:27,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:00:27,835 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 11 proven. 63 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-18 20:00:27,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:00:27,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680563226] [2022-11-18 20:00:27,836 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:00:27,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548578796] [2022-11-18 20:00:27,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548578796] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:00:27,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:00:27,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-11-18 20:00:27,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876092181] [2022-11-18 20:00:27,837 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:00:27,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-18 20:00:27,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:00:27,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-18 20:00:27,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-11-18 20:00:27,838 INFO L87 Difference]: Start difference. First operand 164 states and 183 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-18 20:00:28,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:00:28,070 INFO L93 Difference]: Finished difference Result 210 states and 229 transitions. [2022-11-18 20:00:28,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-18 20:00:28,070 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 74 [2022-11-18 20:00:28,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:00:28,071 INFO L225 Difference]: With dead ends: 210 [2022-11-18 20:00:28,072 INFO L226 Difference]: Without dead ends: 165 [2022-11-18 20:00:28,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 132 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-11-18 20:00:28,073 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 82 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-18 20:00:28,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 183 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-18 20:00:28,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-11-18 20:00:28,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 156. [2022-11-18 20:00:28,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 135 states have (on average 1.0962962962962963) internal successors, (148), 135 states have internal predecessors, (148), 11 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2022-11-18 20:00:28,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 172 transitions. [2022-11-18 20:00:28,101 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 172 transitions. Word has length 74 [2022-11-18 20:00:28,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:00:28,102 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 172 transitions. [2022-11-18 20:00:28,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-18 20:00:28,102 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 172 transitions. [2022-11-18 20:00:28,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-18 20:00:28,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:00:28,103 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:00:28,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:00:28,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 20:00:28,311 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:00:28,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:00:28,312 INFO L85 PathProgramCache]: Analyzing trace with hash 2141231294, now seen corresponding path program 1 times [2022-11-18 20:00:28,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:00:28,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566892984] [2022-11-18 20:00:28,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:28,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:00:28,345 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:00:28,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [484590224] [2022-11-18 20:00:28,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:00:28,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:00:28,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:00:28,347 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:00:28,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-18 20:00:28,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:00:28,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-18 20:00:28,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:00:28,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-18 20:00:28,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 37 [2022-11-18 20:00:29,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:00:29,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:00:29,218 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:00:29,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 54 [2022-11-18 20:00:29,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:00:29,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:00:29,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:00:29,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:00:29,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:00:29,373 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:00:29,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 49 [2022-11-18 20:00:30,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:00:30,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:00:30,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:00:30,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:00:30,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:00:30,372 INFO L321 Elim1Store]: treesize reduction 105, result has 47.2 percent of original size [2022-11-18 20:00:30,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 124 [2022-11-18 20:00:36,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:00:36,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:00:36,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:00:36,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:00:36,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:00:37,214 INFO L321 Elim1Store]: treesize reduction 576, result has 29.9 percent of original size [2022-11-18 20:00:37,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 235 treesize of output 318 [2022-11-18 20:01:17,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:01:17,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:01:17,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:01:17,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 20:01:26,218 WARN L233 SmtUtils]: Spent 8.53s on a formula simplification. DAG size of input: 995 DAG size of output: 184 (called from [L 318] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-11-18 20:01:26,223 INFO L321 Elim1Store]: treesize reduction 4925, result has 9.4 percent of original size [2022-11-18 20:01:26,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 37 select indices, 37 select index equivalence classes, 6 disjoint index pairs (out of 666 index pairs), introduced 37 new quantified variables, introduced 666 case distinctions, treesize of input 857 treesize of output 724 [2022-11-18 20:07:14,631 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-18 20:07:14,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:07:22,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:07:22,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566892984] [2022-11-18 20:07:22,178 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:07:22,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484590224] [2022-11-18 20:07:22,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484590224] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:07:22,179 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:07:22,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2022-11-18 20:07:22,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562445822] [2022-11-18 20:07:22,179 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 20:07:22,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-18 20:07:22,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:07:22,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-18 20:07:22,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=2156, Unknown=7, NotChecked=0, Total=2450 [2022-11-18 20:07:22,181 INFO L87 Difference]: Start difference. First operand 156 states and 172 transitions. Second operand has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 35 states have internal predecessors, (64), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-18 20:07:22,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:07:22,917 INFO L93 Difference]: Finished difference Result 195 states and 213 transitions. [2022-11-18 20:07:22,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-18 20:07:22,918 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 35 states have internal predecessors, (64), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 84 [2022-11-18 20:07:22,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:07:22,919 INFO L225 Difference]: With dead ends: 195 [2022-11-18 20:07:22,919 INFO L226 Difference]: Without dead ends: 175 [2022-11-18 20:07:22,920 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1196 ImplicationChecksByTransitivity, 34.0s TimeCoverageRelationStatistics Valid=323, Invalid=2426, Unknown=7, NotChecked=0, Total=2756 [2022-11-18 20:07:22,921 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 38 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 312 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:07:22,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 699 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 278 Invalid, 0 Unknown, 312 Unchecked, 0.3s Time] [2022-11-18 20:07:22,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-11-18 20:07:22,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2022-11-18 20:07:22,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 147 states have (on average 1.08843537414966) internal successors, (160), 147 states have internal predecessors, (160), 14 states have call successors, (14), 10 states have call predecessors, (14), 11 states have return successors, (16), 15 states have call predecessors, (16), 14 states have call successors, (16) [2022-11-18 20:07:22,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 190 transitions. [2022-11-18 20:07:22,962 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 190 transitions. Word has length 84 [2022-11-18 20:07:22,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:07:22,963 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 190 transitions. [2022-11-18 20:07:22,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 35 states have internal predecessors, (64), 4 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-18 20:07:22,964 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 190 transitions. [2022-11-18 20:07:22,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-18 20:07:22,965 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:07:22,965 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2022-11-18 20:07:22,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-18 20:07:23,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:07:23,171 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:07:23,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:07:23,172 INFO L85 PathProgramCache]: Analyzing trace with hash 599706749, now seen corresponding path program 8 times [2022-11-18 20:07:23,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:07:23,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520045778] [2022-11-18 20:07:23,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:07:23,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:07:23,186 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:07:23,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1853462413] [2022-11-18 20:07:23,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:07:23,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:07:23,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:07:23,188 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:07:23,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-18 20:07:24,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:07:24,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:07:24,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 121 conjunts are in the unsatisfiable core [2022-11-18 20:07:24,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:07:24,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-18 20:07:24,741 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 37 [2022-11-18 20:07:24,843 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 20:07:24,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2022-11-18 20:07:25,159 INFO L321 Elim1Store]: treesize reduction 110, result has 30.4 percent of original size [2022-11-18 20:07:25,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 73 [2022-11-18 20:07:25,372 INFO L321 Elim1Store]: treesize reduction 166, result has 26.9 percent of original size [2022-11-18 20:07:25,373 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 81 treesize of output 89 [2022-11-18 20:07:25,617 INFO L321 Elim1Store]: treesize reduction 156, result has 23.5 percent of original size [2022-11-18 20:07:25,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 93 treesize of output 104 [2022-11-18 20:07:26,041 INFO L321 Elim1Store]: treesize reduction 326, result has 15.8 percent of original size [2022-11-18 20:07:26,041 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 81 treesize of output 95 [2022-11-18 20:07:26,346 INFO L321 Elim1Store]: treesize reduction 434, result has 12.3 percent of original size [2022-11-18 20:07:26,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 98 treesize of output 115 [2022-11-18 20:07:26,720 INFO L321 Elim1Store]: treesize reduction 452, result has 11.9 percent of original size [2022-11-18 20:07:26,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 34 case distinctions, treesize of input 106 treesize of output 126 [2022-11-18 20:08:35,739 INFO L321 Elim1Store]: treesize reduction 520, result has 30.1 percent of original size [2022-11-18 20:08:35,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 116 treesize of output 267 [2022-11-18 20:09:32,103 INFO L321 Elim1Store]: treesize reduction 1316, result has 12.7 percent of original size [2022-11-18 20:09:32,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 19 select indices, 19 select index equivalence classes, 0 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 171 case distinctions, treesize of input 803 treesize of output 395 [2022-11-18 20:09:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 8 proven. 222 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-18 20:09:38,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:10:19,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:10:19,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520045778] [2022-11-18 20:10:19,345 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:10:19,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853462413] [2022-11-18 20:10:19,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853462413] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:10:19,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:10:19,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2022-11-18 20:10:19,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929530854] [2022-11-18 20:10:19,345 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 20:10:19,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-11-18 20:10:19,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:10:19,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-11-18 20:10:19,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=612, Invalid=5997, Unknown=33, NotChecked=0, Total=6642 [2022-11-18 20:10:19,348 INFO L87 Difference]: Start difference. First operand 173 states and 190 transitions. Second operand has 55 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 54 states have internal predecessors, (78), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:10:20,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:10:20,989 INFO L93 Difference]: Finished difference Result 247 states and 276 transitions. [2022-11-18 20:10:20,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-18 20:10:20,990 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 54 states have internal predecessors, (78), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 89 [2022-11-18 20:10:20,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:10:20,991 INFO L225 Difference]: With dead ends: 247 [2022-11-18 20:10:20,991 INFO L226 Difference]: Without dead ends: 243 [2022-11-18 20:10:20,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3066 ImplicationChecksByTransitivity, 156.5s TimeCoverageRelationStatistics Valid=625, Invalid=6148, Unknown=33, NotChecked=0, Total=6806 [2022-11-18 20:10:20,994 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 16 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 380 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-18 20:10:20,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 722 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 366 Invalid, 0 Unknown, 380 Unchecked, 0.7s Time] [2022-11-18 20:10:20,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-11-18 20:10:21,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 239. [2022-11-18 20:10:21,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 208 states have (on average 1.1057692307692308) internal successors, (230), 208 states have internal predecessors, (230), 17 states have call successors, (17), 12 states have call predecessors, (17), 13 states have return successors, (20), 18 states have call predecessors, (20), 17 states have call successors, (20) [2022-11-18 20:10:21,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 267 transitions. [2022-11-18 20:10:21,056 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 267 transitions. Word has length 89 [2022-11-18 20:10:21,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:10:21,056 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 267 transitions. [2022-11-18 20:10:21,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 54 states have internal predecessors, (78), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-18 20:10:21,057 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 267 transitions. [2022-11-18 20:10:21,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-18 20:10:21,058 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:10:21,058 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2022-11-18 20:10:21,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-18 20:10:21,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 20:10:21,266 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:10:21,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:10:21,266 INFO L85 PathProgramCache]: Analyzing trace with hash 952826399, now seen corresponding path program 9 times [2022-11-18 20:10:21,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:10:21,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22481296] [2022-11-18 20:10:21,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:10:21,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:10:21,279 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:10:21,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [768821910] [2022-11-18 20:10:21,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:10:21,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:10:21,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:10:21,281 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:10:21,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-18 20:10:22,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-18 20:10:22,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:10:22,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 20:10:22,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:10:22,461 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 62 proven. 59 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-11-18 20:10:22,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:10:22,602 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 37 proven. 84 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-11-18 20:10:22,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:10:22,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22481296] [2022-11-18 20:10:22,602 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:10:22,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768821910] [2022-11-18 20:10:22,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768821910] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:10:22,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:10:22,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-18 20:10:22,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397469363] [2022-11-18 20:10:22,603 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:10:22,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 20:10:22,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:10:22,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 20:10:22,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:10:22,604 INFO L87 Difference]: Start difference. First operand 239 states and 267 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 20:10:23,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:10:23,209 INFO L93 Difference]: Finished difference Result 478 states and 551 transitions. [2022-11-18 20:10:23,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-18 20:10:23,209 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 91 [2022-11-18 20:10:23,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:10:23,212 INFO L225 Difference]: With dead ends: 478 [2022-11-18 20:10:23,212 INFO L226 Difference]: Without dead ends: 355 [2022-11-18 20:10:23,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 170 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:10:23,213 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 295 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-18 20:10:23,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 228 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-18 20:10:23,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-11-18 20:10:23,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 296. [2022-11-18 20:10:23,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 258 states have (on average 1.1046511627906976) internal successors, (285), 258 states have internal predecessors, (285), 21 states have call successors, (21), 14 states have call predecessors, (21), 16 states have return successors, (26), 23 states have call predecessors, (26), 21 states have call successors, (26) [2022-11-18 20:10:23,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 332 transitions. [2022-11-18 20:10:23,301 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 332 transitions. Word has length 91 [2022-11-18 20:10:23,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:10:23,302 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 332 transitions. [2022-11-18 20:10:23,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-18 20:10:23,302 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 332 transitions. [2022-11-18 20:10:23,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-18 20:10:23,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:10:23,308 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2022-11-18 20:10:23,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-18 20:10:23,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 20:10:23,512 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:10:23,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:10:23,513 INFO L85 PathProgramCache]: Analyzing trace with hash -825002241, now seen corresponding path program 10 times [2022-11-18 20:10:23,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:10:23,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143903710] [2022-11-18 20:10:23,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:10:23,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:10:23,525 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:10:23,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [943314690] [2022-11-18 20:10:23,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:10:23,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:10:23,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:10:23,527 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:10:23,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-18 20:10:23,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:10:23,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:10:23,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-18 20:10:23,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:10:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 88 proven. 41 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-11-18 20:10:23,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:10:23,833 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 73 proven. 48 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-11-18 20:10:23,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:10:23,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143903710] [2022-11-18 20:10:23,834 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:10:23,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943314690] [2022-11-18 20:10:23,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943314690] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:10:23,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-18 20:10:23,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-11-18 20:10:23,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165813180] [2022-11-18 20:10:23,835 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-18 20:10:23,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-18 20:10:23,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:10:23,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-18 20:10:23,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-11-18 20:10:23,837 INFO L87 Difference]: Start difference. First operand 296 states and 332 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-18 20:10:24,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:10:24,378 INFO L93 Difference]: Finished difference Result 375 states and 416 transitions. [2022-11-18 20:10:24,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-18 20:10:24,378 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 91 [2022-11-18 20:10:24,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:10:24,381 INFO L225 Difference]: With dead ends: 375 [2022-11-18 20:10:24,381 INFO L226 Difference]: Without dead ends: 307 [2022-11-18 20:10:24,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 162 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2022-11-18 20:10:24,383 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 130 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 367 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-18 20:10:24,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 389 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 367 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-18 20:10:24,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-11-18 20:10:24,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 294. [2022-11-18 20:10:24,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 256 states have (on average 1.0859375) internal successors, (278), 256 states have internal predecessors, (278), 21 states have call successors, (21), 14 states have call predecessors, (21), 16 states have return successors, (26), 23 states have call predecessors, (26), 21 states have call successors, (26) [2022-11-18 20:10:24,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 325 transitions. [2022-11-18 20:10:24,492 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 325 transitions. Word has length 91 [2022-11-18 20:10:24,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:10:24,492 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 325 transitions. [2022-11-18 20:10:24,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 15 states have internal predecessors, (64), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-18 20:10:24,493 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 325 transitions. [2022-11-18 20:10:24,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-18 20:10:24,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:10:24,495 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:10:24,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-18 20:10:24,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 20:10:24,701 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:10:24,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:10:24,701 INFO L85 PathProgramCache]: Analyzing trace with hash -2080469951, now seen corresponding path program 2 times [2022-11-18 20:10:24,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:10:24,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736013429] [2022-11-18 20:10:24,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:10:24,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:10:24,713 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:10:24,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2031576059] [2022-11-18 20:10:24,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:10:24,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:10:24,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:10:24,715 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:10:24,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-18 20:10:25,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:10:25,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:10:25,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 141 conjunts are in the unsatisfiable core [2022-11-18 20:10:25,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:10:25,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-18 20:10:25,604 INFO L321 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2022-11-18 20:10:25,604 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2022-11-18 20:10:25,717 INFO L321 Elim1Store]: treesize reduction 37, result has 26.0 percent of original size [2022-11-18 20:10:25,717 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 53 [2022-11-18 20:10:26,048 INFO L321 Elim1Store]: treesize reduction 110, result has 30.4 percent of original size [2022-11-18 20:10:26,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 73 [2022-11-18 20:10:26,240 INFO L321 Elim1Store]: treesize reduction 152, result has 24.0 percent of original size [2022-11-18 20:10:26,240 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 85 treesize of output 93 [2022-11-18 20:10:26,477 INFO L321 Elim1Store]: treesize reduction 156, result has 23.5 percent of original size [2022-11-18 20:10:26,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 93 treesize of output 104 [2022-11-18 20:10:27,026 INFO L321 Elim1Store]: treesize reduction 326, result has 15.8 percent of original size [2022-11-18 20:10:27,027 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 81 treesize of output 95 [2022-11-18 20:10:27,452 INFO L321 Elim1Store]: treesize reduction 434, result has 12.3 percent of original size [2022-11-18 20:10:27,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 98 treesize of output 115 [2022-11-18 20:10:27,870 INFO L321 Elim1Store]: treesize reduction 452, result has 11.9 percent of original size [2022-11-18 20:10:27,870 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 34 case distinctions, treesize of input 106 treesize of output 126 [2022-11-18 20:12:15,515 INFO L321 Elim1Store]: treesize reduction 696, result has 15.9 percent of original size [2022-11-18 20:12:15,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 122 treesize of output 175 [2022-11-18 20:13:45,000 INFO L321 Elim1Store]: treesize reduction 673, result has 6.8 percent of original size [2022-11-18 20:13:45,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 201 treesize of output 119 [2022-11-18 20:13:45,514 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 8 proven. 224 refuted. 1 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:13:45,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:14:11,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:14:11,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736013429] [2022-11-18 20:14:11,406 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:14:11,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031576059] [2022-11-18 20:14:11,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031576059] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:14:11,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-18 20:14:11,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2022-11-18 20:14:11,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135680860] [2022-11-18 20:14:11,406 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-18 20:14:11,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-18 20:14:11,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:14:11,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-18 20:14:11,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=736, Invalid=7968, Unknown=38, NotChecked=0, Total=8742 [2022-11-18 20:14:11,410 INFO L87 Difference]: Start difference. First operand 294 states and 325 transitions. Second operand has 58 states, 56 states have (on average 1.4642857142857142) internal successors, (82), 53 states have internal predecessors, (82), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-18 20:14:15,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:14:15,852 INFO L93 Difference]: Finished difference Result 353 states and 393 transitions. [2022-11-18 20:14:15,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-18 20:14:15,853 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 56 states have (on average 1.4642857142857142) internal successors, (82), 53 states have internal predecessors, (82), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 95 [2022-11-18 20:14:15,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:14:15,854 INFO L225 Difference]: With dead ends: 353 [2022-11-18 20:14:15,855 INFO L226 Difference]: Without dead ends: 349 [2022-11-18 20:14:15,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 46 SyntacticMatches, 10 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4483 ImplicationChecksByTransitivity, 220.5s TimeCoverageRelationStatistics Valid=771, Invalid=8310, Unknown=39, NotChecked=0, Total=9120 [2022-11-18 20:14:15,857 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 45 mSDsluCounter, 800 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 862 SdHoareTripleChecker+Invalid, 1778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1349 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-18 20:14:15,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 862 Invalid, 1778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 421 Invalid, 0 Unknown, 1349 Unchecked, 0.8s Time] [2022-11-18 20:14:15,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-11-18 20:14:15,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 305. [2022-11-18 20:14:15,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 264 states have (on average 1.0909090909090908) internal successors, (288), 264 states have internal predecessors, (288), 22 states have call successors, (22), 15 states have call predecessors, (22), 18 states have return successors, (28), 25 states have call predecessors, (28), 22 states have call successors, (28) [2022-11-18 20:14:15,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 338 transitions. [2022-11-18 20:14:15,935 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 338 transitions. Word has length 95 [2022-11-18 20:14:15,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:14:15,936 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 338 transitions. [2022-11-18 20:14:15,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 56 states have (on average 1.4642857142857142) internal successors, (82), 53 states have internal predecessors, (82), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-18 20:14:15,937 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 338 transitions. [2022-11-18 20:14:15,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-18 20:14:15,938 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:14:15,939 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:14:15,947 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-11-18 20:14:16,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-18 20:14:16,147 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:14:16,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:14:16,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1370491843, now seen corresponding path program 1 times [2022-11-18 20:14:16,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:14:16,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329186541] [2022-11-18 20:14:16,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:14:16,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:14:16,180 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:14:16,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1930166034] [2022-11-18 20:14:16,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:14:16,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:14:16,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:14:16,183 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:14:16,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-18 20:14:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:14:16,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 20:14:16,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:14:16,365 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2022-11-18 20:14:16,365 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:14:16,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:14:16,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329186541] [2022-11-18 20:14:16,366 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:14:16,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930166034] [2022-11-18 20:14:16,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930166034] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:14:16,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:14:16,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:14:16,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702048598] [2022-11-18 20:14:16,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:14:16,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:14:16,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:14:16,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:14:16,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:14:16,371 INFO L87 Difference]: Start difference. First operand 305 states and 338 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-18 20:14:16,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:14:16,503 INFO L93 Difference]: Finished difference Result 430 states and 481 transitions. [2022-11-18 20:14:16,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-18 20:14:16,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 95 [2022-11-18 20:14:16,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:14:16,506 INFO L225 Difference]: With dead ends: 430 [2022-11-18 20:14:16,507 INFO L226 Difference]: Without dead ends: 314 [2022-11-18 20:14:16,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:14:16,508 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 3 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:14:16,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 166 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:14:16,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-11-18 20:14:16,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 306. [2022-11-18 20:14:16,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 265 states have (on average 1.0867924528301887) internal successors, (288), 263 states have internal predecessors, (288), 22 states have call successors, (22), 15 states have call predecessors, (22), 18 states have return successors, (28), 27 states have call predecessors, (28), 22 states have call successors, (28) [2022-11-18 20:14:16,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 338 transitions. [2022-11-18 20:14:16,598 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 338 transitions. Word has length 95 [2022-11-18 20:14:16,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:14:16,599 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 338 transitions. [2022-11-18 20:14:16,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-18 20:14:16,599 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 338 transitions. [2022-11-18 20:14:16,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-18 20:14:16,601 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:14:16,601 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:14:16,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-18 20:14:16,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:14:16,805 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:14:16,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:14:16,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1291813762, now seen corresponding path program 1 times [2022-11-18 20:14:16,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:14:16,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460208549] [2022-11-18 20:14:16,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:14:16,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:14:16,820 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:14:16,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [632660439] [2022-11-18 20:14:16,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:14:16,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:14:16,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:14:16,823 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:14:16,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-18 20:14:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:14:16,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 20:14:16,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:14:16,975 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 236 trivial. 0 not checked. [2022-11-18 20:14:16,975 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 20:14:16,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:14:16,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460208549] [2022-11-18 20:14:16,976 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-18 20:14:16,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632660439] [2022-11-18 20:14:16,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632660439] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:14:16,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:14:16,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 20:14:16,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171403495] [2022-11-18 20:14:16,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:14:16,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 20:14:16,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:14:16,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 20:14:16,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 20:14:16,978 INFO L87 Difference]: Start difference. First operand 306 states and 338 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-18 20:14:17,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-18 20:14:17,090 INFO L93 Difference]: Finished difference Result 426 states and 474 transitions. [2022-11-18 20:14:17,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-18 20:14:17,090 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 95 [2022-11-18 20:14:17,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-18 20:14:17,092 INFO L225 Difference]: With dead ends: 426 [2022-11-18 20:14:17,092 INFO L226 Difference]: Without dead ends: 308 [2022-11-18 20:14:17,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:14:17,094 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 3 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-18 20:14:17,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 176 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-18 20:14:17,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-11-18 20:14:17,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 306. [2022-11-18 20:14:17,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 265 states have (on average 1.079245283018868) internal successors, (286), 263 states have internal predecessors, (286), 22 states have call successors, (22), 15 states have call predecessors, (22), 18 states have return successors, (28), 27 states have call predecessors, (28), 22 states have call successors, (28) [2022-11-18 20:14:17,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 336 transitions. [2022-11-18 20:14:17,177 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 336 transitions. Word has length 95 [2022-11-18 20:14:17,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-18 20:14:17,177 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 336 transitions. [2022-11-18 20:14:17,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-18 20:14:17,178 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 336 transitions. [2022-11-18 20:14:17,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-11-18 20:14:17,179 INFO L187 NwaCegarLoop]: Found error trace [2022-11-18 20:14:17,179 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:14:17,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-18 20:14:17,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:14:17,385 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-18 20:14:17,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:14:17,386 INFO L85 PathProgramCache]: Analyzing trace with hash 447808260, now seen corresponding path program 1 times [2022-11-18 20:14:17,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:14:17,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032711337] [2022-11-18 20:14:17,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:14:17,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:14:17,398 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-18 20:14:17,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2111548599] [2022-11-18 20:14:17,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:14:17,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:14:17,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:14:17,400 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:14:17,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b20b6e21-3ce2-4eed-aec1-b8f1cab503b5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-18 20:14:17,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:14:17,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 142 conjunts are in the unsatisfiable core [2022-11-18 20:14:17,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:14:18,068 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-11-18 20:14:18,179 INFO L321 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2022-11-18 20:14:18,180 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2022-11-18 20:14:18,314 INFO L321 Elim1Store]: treesize reduction 53, result has 34.6 percent of original size [2022-11-18 20:14:18,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 50 [2022-11-18 20:14:18,655 INFO L321 Elim1Store]: treesize reduction 100, result has 20.6 percent of original size [2022-11-18 20:14:18,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 51 [2022-11-18 20:14:18,862 INFO L321 Elim1Store]: treesize reduction 148, result has 14.9 percent of original size [2022-11-18 20:14:18,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 63 treesize of output 71 [2022-11-18 20:14:19,083 INFO L321 Elim1Store]: treesize reduction 158, result has 14.1 percent of original size [2022-11-18 20:14:19,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 71 treesize of output 82 [2022-11-18 20:14:19,579 INFO L321 Elim1Store]: treesize reduction 348, result has 17.3 percent of original size [2022-11-18 20:14:19,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 93 treesize of output 107 [2022-11-18 20:14:20,009 INFO L321 Elim1Store]: treesize reduction 440, result has 16.3 percent of original size [2022-11-18 20:14:20,009 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 106 treesize of output 123 [2022-11-18 20:14:20,462 INFO L321 Elim1Store]: treesize reduction 452, result has 13.9 percent of original size [2022-11-18 20:14:20,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 34 case distinctions, treesize of input 118 treesize of output 138