./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array4_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array4_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF --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 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:57:48,786 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:57:48,789 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:57:48,850 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:57:48,851 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:57:48,853 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:57:48,855 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:57:48,858 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:57:48,861 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:57:48,862 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:57:48,864 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:57:48,866 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:57:48,867 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:57:48,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:57:48,871 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:57:48,873 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:57:48,874 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:57:48,876 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:57:48,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:57:48,883 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:57:48,886 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:57:48,888 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:57:48,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:57:48,891 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:57:48,897 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:57:48,897 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:57:48,898 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:57:48,899 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:57:48,900 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:57:48,902 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:57:48,903 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:57:48,904 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:57:48,905 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:57:48,907 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:57:48,908 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:57:48,909 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:57:48,910 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:57:48,910 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:57:48,911 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:57:48,912 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:57:48,913 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:57:48,915 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:57:48,948 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:57:48,948 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:57:48,949 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:57:48,949 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:57:48,950 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:57:48,950 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:57:48,951 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:57:48,952 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:57:48,952 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:57:48,952 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:57:48,953 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:57:48,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:57:48,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:57:48,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:57:48,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:57:48,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:57:48,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:57:48,955 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:57:48,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:57:48,956 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:57:48,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:57:48,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:57:48,957 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:57:48,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:57:48,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:57:48,973 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:57:48,974 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:57:48,974 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:57:48,974 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:57:48,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:57:48,975 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:57:48,975 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:57:48,976 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:57:48,976 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:57:48,976 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_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 51462516d41bb1edc1c2003475b488124e11e4eb166822052c5d908cea262957 [2021-11-20 06:57:49,270 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:57:49,297 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:57:49,300 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:57:49,302 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:57:49,303 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:57:49,304 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-patterns/array4_pattern.c [2021-11-20 06:57:49,383 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/data/f60200d36/b0d0b3a60f7e4edbb20fdcad8883cce3/FLAG7c39a3ff4 [2021-11-20 06:57:50,035 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:57:50,036 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/sv-benchmarks/c/array-patterns/array4_pattern.c [2021-11-20 06:57:50,048 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/data/f60200d36/b0d0b3a60f7e4edbb20fdcad8883cce3/FLAG7c39a3ff4 [2021-11-20 06:57:50,335 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/data/f60200d36/b0d0b3a60f7e4edbb20fdcad8883cce3 [2021-11-20 06:57:50,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:57:50,341 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:57:50,356 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:57:50,357 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:57:50,361 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:57:50,362 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:57:50" (1/1) ... [2021-11-20 06:57:50,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@147dd731 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:50, skipping insertion in model container [2021-11-20 06:57:50,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:57:50" (1/1) ... [2021-11-20 06:57:50,373 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:57:50,396 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:57:50,626 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2021-11-20 06:57:50,652 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:57:50,661 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:57:50,675 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/sv-benchmarks/c/array-patterns/array4_pattern.c[1835,1848] [2021-11-20 06:57:50,690 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:57:50,708 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:57:50,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:50 WrapperNode [2021-11-20 06:57:50,708 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:57:50,710 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:57:50,710 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:57:50,710 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:57:50,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:50" (1/1) ... [2021-11-20 06:57:50,727 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:50" (1/1) ... [2021-11-20 06:57:50,757 INFO L137 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 93 [2021-11-20 06:57:50,758 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:57:50,759 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:57:50,759 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:57:50,759 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:57:50,771 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:50" (1/1) ... [2021-11-20 06:57:50,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:50" (1/1) ... [2021-11-20 06:57:50,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:50" (1/1) ... [2021-11-20 06:57:50,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:50" (1/1) ... [2021-11-20 06:57:50,784 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:50" (1/1) ... [2021-11-20 06:57:50,789 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:50" (1/1) ... [2021-11-20 06:57:50,791 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:50" (1/1) ... [2021-11-20 06:57:50,794 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:57:50,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:57:50,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:57:50,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:57:50,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:50" (1/1) ... [2021-11-20 06:57:50,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:57:50,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:57:50,839 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:57:50,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:57:50,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:57:50,899 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 06:57:50,899 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 06:57:50,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:57:50,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 06:57:50,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:57:50,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:57:50,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:57:50,900 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:57:50,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 06:57:50,978 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:57:50,980 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:57:51,184 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:57:51,193 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:57:51,193 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 06:57:51,196 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:57:51 BoogieIcfgContainer [2021-11-20 06:57:51,196 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:57:51,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:57:51,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:57:51,204 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:57:51,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:57:50" (1/3) ... [2021-11-20 06:57:51,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cb2ae05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:57:51, skipping insertion in model container [2021-11-20 06:57:51,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:57:50" (2/3) ... [2021-11-20 06:57:51,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cb2ae05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:57:51, skipping insertion in model container [2021-11-20 06:57:51,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:57:51" (3/3) ... [2021-11-20 06:57:51,208 INFO L111 eAbstractionObserver]: Analyzing ICFG array4_pattern.c [2021-11-20 06:57:51,216 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:57:51,216 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:57:51,280 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:57:51,289 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:57:51,290 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:57:51,316 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 06:57:51,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 06:57:51,324 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:57:51,325 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:57:51,325 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:57:51,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:57:51,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1359011546, now seen corresponding path program 1 times [2021-11-20 06:57:51,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:57:51,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002756861] [2021-11-20 06:57:51,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:57:51,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:57:51,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:57:51,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-20 06:57:51,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:57:51,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:57:51,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:57:51,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002756861] [2021-11-20 06:57:51,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002756861] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:57:51,574 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:57:51,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:57:51,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601271852] [2021-11-20 06:57:51,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:57:51,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:57:51,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:57:51,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:57:51,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:57:51,650 INFO L87 Difference]: Start difference. First operand has 33 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 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 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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) [2021-11-20 06:57:51,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:57:51,679 INFO L93 Difference]: Finished difference Result 63 states and 93 transitions. [2021-11-20 06:57:51,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:57:51,682 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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 16 [2021-11-20 06:57:51,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:57:51,691 INFO L225 Difference]: With dead ends: 63 [2021-11-20 06:57:51,691 INFO L226 Difference]: Without dead ends: 29 [2021-11-20 06:57:51,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:57:51,701 INFO L933 BasicCegarLoop]: 40 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, 40 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 [2021-11-20 06:57:51,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:57:51,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-20 06:57:51,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-20 06:57:51,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 06:57:51,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2021-11-20 06:57:51,758 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 16 [2021-11-20 06:57:51,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:57:51,758 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2021-11-20 06:57:51,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 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) [2021-11-20 06:57:51,759 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2021-11-20 06:57:51,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 06:57:51,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:57:51,763 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:57:51,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:57:51,764 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:57:51,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:57:51,765 INFO L85 PathProgramCache]: Analyzing trace with hash -852430543, now seen corresponding path program 1 times [2021-11-20 06:57:51,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:57:51,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469746626] [2021-11-20 06:57:51,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:57:51,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:57:51,821 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:57:51,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2112421408] [2021-11-20 06:57:51,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:57:51,822 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:57:51,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:57:51,825 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:57:51,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:57:51,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:57:51,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:57:51,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:57:52,213 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 06:57:52,214 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:57:52,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:57:52,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469746626] [2021-11-20 06:57:52,216 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:57:52,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112421408] [2021-11-20 06:57:52,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112421408] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:57:52,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:57:52,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:57:52,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888259358] [2021-11-20 06:57:52,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:57:52,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:57:52,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:57:52,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:57:52,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:57:52,230 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:57:52,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:57:52,333 INFO L93 Difference]: Finished difference Result 70 states and 88 transitions. [2021-11-20 06:57:52,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:57:52,336 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2021-11-20 06:57:52,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:57:52,338 INFO L225 Difference]: With dead ends: 70 [2021-11-20 06:57:52,341 INFO L226 Difference]: Without dead ends: 48 [2021-11-20 06:57:52,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:57:52,345 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 8 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:57:52,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 53 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:57:52,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-20 06:57:52,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2021-11-20 06:57:52,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 06:57:52,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 49 transitions. [2021-11-20 06:57:52,367 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 49 transitions. Word has length 42 [2021-11-20 06:57:52,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:57:52,370 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 49 transitions. [2021-11-20 06:57:52,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:57:52,371 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 49 transitions. [2021-11-20 06:57:52,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-20 06:57:52,373 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:57:52,374 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:57:52,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-20 06:57:52,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-20 06:57:52,604 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:57:52,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:57:52,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1661777169, now seen corresponding path program 1 times [2021-11-20 06:57:52,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:57:52,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029184615] [2021-11-20 06:57:52,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:57:52,606 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:57:52,690 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:57:52,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1624600258] [2021-11-20 06:57:52,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:57:52,692 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:57:52,692 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:57:52,694 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:57:52,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:57:52,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:57:52,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:57:52,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:57:53,069 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 06:57:53,069 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:57:53,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:57:53,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029184615] [2021-11-20 06:57:53,070 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:57:53,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624600258] [2021-11-20 06:57:53,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624600258] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:57:53,071 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:57:53,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 06:57:53,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878079939] [2021-11-20 06:57:53,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:57:53,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 06:57:53,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:57:53,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 06:57:53,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 06:57:53,075 INFO L87 Difference]: Start difference. First operand 38 states and 49 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:57:53,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:57:53,110 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2021-11-20 06:57:53,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 06:57:53,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2021-11-20 06:57:53,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:57:53,113 INFO L225 Difference]: With dead ends: 43 [2021-11-20 06:57:53,115 INFO L226 Difference]: Without dead ends: 39 [2021-11-20 06:57:53,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:57:53,118 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:57:53,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 81 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:57:53,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-20 06:57:53,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-11-20 06:57:53,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 06:57:53,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2021-11-20 06:57:53,145 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 42 [2021-11-20 06:57:53,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:57:53,146 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2021-11-20 06:57:53,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:57:53,146 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2021-11-20 06:57:53,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-20 06:57:53,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:57:53,149 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:57:53,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:57:53,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:57:53,374 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:57:53,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:57:53,374 INFO L85 PathProgramCache]: Analyzing trace with hash 813208561, now seen corresponding path program 1 times [2021-11-20 06:57:53,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:57:53,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092416255] [2021-11-20 06:57:53,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:57:53,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:57:53,431 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:57:53,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [915691113] [2021-11-20 06:57:53,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:57:53,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:57:53,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:57:53,456 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:57:53,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:57:53,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:57:53,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:57:53,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:57:53,757 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:57:53,758 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:57:53,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:57:53,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092416255] [2021-11-20 06:57:53,759 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:57:53,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915691113] [2021-11-20 06:57:53,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915691113] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:57:53,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:57:53,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:57:53,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455872036] [2021-11-20 06:57:53,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:57:53,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:57:53,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:57:53,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:57:53,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:57:53,769 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:57:53,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:57:53,918 INFO L93 Difference]: Finished difference Result 77 states and 98 transitions. [2021-11-20 06:57:53,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:57:53,919 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2021-11-20 06:57:53,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:57:53,924 INFO L225 Difference]: With dead ends: 77 [2021-11-20 06:57:53,924 INFO L226 Difference]: Without dead ends: 43 [2021-11-20 06:57:53,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:57:53,931 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:57:53,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 102 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:57:53,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-20 06:57:53,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-11-20 06:57:53,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 06:57:53,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2021-11-20 06:57:53,950 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 44 [2021-11-20 06:57:53,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:57:53,950 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2021-11-20 06:57:53,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:57:53,951 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2021-11-20 06:57:53,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-20 06:57:53,953 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:57:53,953 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:57:53,979 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:57:54,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:57:54,158 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:57:54,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:57:54,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1843316237, now seen corresponding path program 1 times [2021-11-20 06:57:54,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:57:54,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036019520] [2021-11-20 06:57:54,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:57:54,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:57:54,195 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:57:54,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1506169705] [2021-11-20 06:57:54,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:57:54,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:57:54,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:57:54,197 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:57:54,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:57:54,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:57:54,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-20 06:57:54,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:57:54,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 10 treesize of output 8 [2021-11-20 06:57:54,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 06:57:56,696 INFO L354 Elim1Store]: treesize reduction 62, result has 1.6 percent of original size [2021-11-20 06:57:56,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 66 treesize of output 41 [2021-11-20 06:57:57,105 INFO L354 Elim1Store]: treesize reduction 62, result has 15.1 percent of original size [2021-11-20 06:57:57,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 36 [2021-11-20 06:57:57,163 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:57:57,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:58:10,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:58:10,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036019520] [2021-11-20 06:58:10,053 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:58:10,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506169705] [2021-11-20 06:58:10,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506169705] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:58:10,054 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:58:10,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-20 06:58:10,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216867525] [2021-11-20 06:58:10,054 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:58:10,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-20 06:58:10,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:58:10,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-20 06:58:10,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=444, Unknown=6, NotChecked=0, Total=552 [2021-11-20 06:58:10,057 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 06:58:10,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:58:10,453 INFO L93 Difference]: Finished difference Result 79 states and 95 transitions. [2021-11-20 06:58:10,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 06:58:10,454 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 46 [2021-11-20 06:58:10,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:58:10,456 INFO L225 Difference]: With dead ends: 79 [2021-11-20 06:58:10,458 INFO L226 Difference]: Without dead ends: 75 [2021-11-20 06:58:10,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=132, Invalid=618, Unknown=6, NotChecked=0, Total=756 [2021-11-20 06:58:10,461 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 34 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:58:10,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 252 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 111 Invalid, 0 Unknown, 157 Unchecked, 0.2s Time] [2021-11-20 06:58:10,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-20 06:58:10,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2021-11-20 06:58:10,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 51 states have internal predecessors, (57), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-11-20 06:58:10,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2021-11-20 06:58:10,492 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 46 [2021-11-20 06:58:10,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:58:10,493 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2021-11-20 06:58:10,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.736842105263158) internal successors, (33), 17 states have internal predecessors, (33), 4 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-20 06:58:10,494 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2021-11-20 06:58:10,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 06:58:10,505 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:58:10,505 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-20 06:58:10,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:58:10,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:58:10,710 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:58:10,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:58:10,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1847143947, now seen corresponding path program 2 times [2021-11-20 06:58:10,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:58:10,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848386164] [2021-11-20 06:58:10,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:58:10,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:58:10,766 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:58:10,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2094911558] [2021-11-20 06:58:10,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:58:10,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:58:10,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:58:10,768 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:58:10,771 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:58:10,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:58:10,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:58:10,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:58:10,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:58:11,078 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:58:11,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:58:11,264 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 06:58:11,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:58:11,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848386164] [2021-11-20 06:58:11,265 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:58:11,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094911558] [2021-11-20 06:58:11,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094911558] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:58:11,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:58:11,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-20 06:58:11,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554792412] [2021-11-20 06:58:11,267 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:58:11,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:58:11,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:58:11,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:58:11,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:58:11,270 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:58:11,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:58:11,547 INFO L93 Difference]: Finished difference Result 150 states and 186 transitions. [2021-11-20 06:58:11,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:58:11,548 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 48 [2021-11-20 06:58:11,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:58:11,550 INFO L225 Difference]: With dead ends: 150 [2021-11-20 06:58:11,550 INFO L226 Difference]: Without dead ends: 123 [2021-11-20 06:58:11,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:58:11,552 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 79 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:58:11,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 185 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 06:58:11,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-20 06:58:11,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 98. [2021-11-20 06:58:11,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 71 states have (on average 1.1267605633802817) internal successors, (80), 71 states have internal predecessors, (80), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2021-11-20 06:58:11,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 122 transitions. [2021-11-20 06:58:11,574 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 122 transitions. Word has length 48 [2021-11-20 06:58:11,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:58:11,575 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 122 transitions. [2021-11-20 06:58:11,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 9 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:58:11,575 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 122 transitions. [2021-11-20 06:58:11,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-20 06:58:11,577 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:58:11,577 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-20 06:58:11,625 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:58:11,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-20 06:58:11,804 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:58:11,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:58:11,804 INFO L85 PathProgramCache]: Analyzing trace with hash 741894005, now seen corresponding path program 3 times [2021-11-20 06:58:11,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:58:11,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146987320] [2021-11-20 06:58:11,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:58:11,805 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:58:11,842 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:58:11,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1041307543] [2021-11-20 06:58:11,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:58:11,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:58:11,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:58:11,850 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:58:11,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:58:11,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-20 06:58:11,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:58:11,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-20 06:58:11,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:58:11,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 10 treesize of output 8 [2021-11-20 06:58:12,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 35 [2021-11-20 06:58:13,096 INFO L354 Elim1Store]: treesize reduction 56, result has 30.9 percent of original size [2021-11-20 06:58:13,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 54 [2021-11-20 06:58:13,276 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-20 06:58:13,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:58:13,528 INFO L354 Elim1Store]: treesize reduction 23, result has 57.4 percent of original size [2021-11-20 06:58:13,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 454 treesize of output 348 [2021-11-20 06:58:13,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:58:13,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 348 treesize of output 336 [2021-11-20 06:58:13,641 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:58:13,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 20 treesize of output 24 [2021-11-20 06:58:13,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 13 treesize of output 7 [2021-11-20 06:58:13,907 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 06:58:13,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 498 treesize of output 500 [2021-11-20 06:58:29,001 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-20 06:58:29,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:58:29,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146987320] [2021-11-20 06:58:29,001 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:58:29,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041307543] [2021-11-20 06:58:29,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041307543] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:58:29,002 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:58:29,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 28 [2021-11-20 06:58:29,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892204531] [2021-11-20 06:58:29,003 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:58:29,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-20 06:58:29,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:58:29,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-20 06:58:29,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-11-20 06:58:29,006 INFO L87 Difference]: Start difference. First operand 98 states and 122 transitions. Second operand has 28 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 7 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-20 06:58:30,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:58:30,861 INFO L93 Difference]: Finished difference Result 136 states and 167 transitions. [2021-11-20 06:58:30,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 06:58:30,863 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 7 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) Word has length 48 [2021-11-20 06:58:30,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:58:30,867 INFO L225 Difference]: With dead ends: 136 [2021-11-20 06:58:30,867 INFO L226 Difference]: Without dead ends: 132 [2021-11-20 06:58:30,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=419, Invalid=1651, Unknown=0, NotChecked=0, Total=2070 [2021-11-20 06:58:30,872 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 83 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:58:30,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 220 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 488 Invalid, 0 Unknown, 49 Unchecked, 0.6s Time] [2021-11-20 06:58:30,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-20 06:58:30,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2021-11-20 06:58:30,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 89 states have (on average 1.1123595505617978) internal successors, (99), 91 states have internal predecessors, (99), 29 states have call successors, (29), 7 states have call predecessors, (29), 7 states have return successors, (29), 27 states have call predecessors, (29), 29 states have call successors, (29) [2021-11-20 06:58:30,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 157 transitions. [2021-11-20 06:58:30,896 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 157 transitions. Word has length 48 [2021-11-20 06:58:30,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:58:30,897 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 157 transitions. [2021-11-20 06:58:30,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 7 states have call successors, (9), 2 states have call predecessors, (9), 5 states have return successors, (9), 5 states have call predecessors, (9), 7 states have call successors, (9) [2021-11-20 06:58:30,898 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 157 transitions. [2021-11-20 06:58:30,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-20 06:58:30,899 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:58:30,899 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-20 06:58:30,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:58:31,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:58:31,114 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:58:31,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:58:31,115 INFO L85 PathProgramCache]: Analyzing trace with hash 48801527, now seen corresponding path program 4 times [2021-11-20 06:58:31,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:58:31,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452286346] [2021-11-20 06:58:31,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:58:31,115 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:58:31,156 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:58:31,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2043401812] [2021-11-20 06:58:31,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:58:31,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:58:31,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:58:31,177 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:58:31,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:58:31,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:58:31,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:58:31,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-20 06:58:31,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:58:31,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 10 treesize of output 8 [2021-11-20 06:58:31,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 06:58:31,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:31,489 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-20 06:58:31,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 53 [2021-11-20 06:58:34,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:34,280 INFO L354 Elim1Store]: treesize reduction 94, result has 37.7 percent of original size [2021-11-20 06:58:34,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 84 treesize of output 103 [2021-11-20 06:58:35,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:35,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:58:35,091 INFO L354 Elim1Store]: treesize reduction 165, result has 4.1 percent of original size [2021-11-20 06:58:35,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 104 treesize of output 52 [2021-11-20 06:58:35,264 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:58:35,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:58:41,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:58:41,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452286346] [2021-11-20 06:58:41,006 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:58:41,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043401812] [2021-11-20 06:58:41,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043401812] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:58:41,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:58:41,007 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-20 06:58:41,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683266915] [2021-11-20 06:58:41,007 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:58:41,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 06:58:41,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:58:41,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 06:58:41,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=980, Unknown=1, NotChecked=0, Total=1190 [2021-11-20 06:58:41,009 INFO L87 Difference]: Start difference. First operand 126 states and 157 transitions. Second operand has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 06:58:42,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:58:42,653 INFO L93 Difference]: Finished difference Result 202 states and 253 transitions. [2021-11-20 06:58:42,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-20 06:58:42,656 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 50 [2021-11-20 06:58:42,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:58:42,658 INFO L225 Difference]: With dead ends: 202 [2021-11-20 06:58:42,659 INFO L226 Difference]: Without dead ends: 162 [2021-11-20 06:58:42,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=259, Invalid=1222, Unknown=1, NotChecked=0, Total=1482 [2021-11-20 06:58:42,661 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 52 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:58:42,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 298 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 494 Invalid, 0 Unknown, 54 Unchecked, 0.7s Time] [2021-11-20 06:58:42,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-20 06:58:42,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 150. [2021-11-20 06:58:42,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 106 states have (on average 1.1132075471698113) internal successors, (118), 109 states have internal predecessors, (118), 35 states have call successors, (35), 8 states have call predecessors, (35), 8 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2021-11-20 06:58:42,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 188 transitions. [2021-11-20 06:58:42,692 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 188 transitions. Word has length 50 [2021-11-20 06:58:42,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:58:42,693 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 188 transitions. [2021-11-20 06:58:42,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 1.619047619047619) internal successors, (34), 22 states have internal predecessors, (34), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 06:58:42,694 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 188 transitions. [2021-11-20 06:58:42,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 06:58:42,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:58:42,696 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-20 06:58:42,744 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 06:58:42,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-20 06:58:42,924 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:58:42,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:58:42,924 INFO L85 PathProgramCache]: Analyzing trace with hash -293138951, now seen corresponding path program 5 times [2021-11-20 06:58:42,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:58:42,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612934643] [2021-11-20 06:58:42,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:58:42,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:58:42,953 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:58:42,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54586517] [2021-11-20 06:58:42,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:58:42,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:58:42,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:58:42,956 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:58:42,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:58:43,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-20 06:58:43,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:58:43,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:58:43,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:58:43,264 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:58:43,264 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:58:43,427 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 06:58:43,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:58:43,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612934643] [2021-11-20 06:58:43,427 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:58:43,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54586517] [2021-11-20 06:58:43,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54586517] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:58:43,427 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:58:43,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-20 06:58:43,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125624584] [2021-11-20 06:58:43,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:58:43,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:58:43,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:58:43,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:58:43,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:58:43,430 INFO L87 Difference]: Start difference. First operand 150 states and 188 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:58:44,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:58:44,099 INFO L93 Difference]: Finished difference Result 332 states and 417 transitions. [2021-11-20 06:58:44,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:58:44,099 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 52 [2021-11-20 06:58:44,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:58:44,102 INFO L225 Difference]: With dead ends: 332 [2021-11-20 06:58:44,102 INFO L226 Difference]: Without dead ends: 254 [2021-11-20 06:58:44,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:58:44,105 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 206 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:58:44,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 263 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:58:44,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-20 06:58:44,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 214. [2021-11-20 06:58:44,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 148 states have (on average 1.1216216216216217) internal successors, (166), 151 states have internal predecessors, (166), 55 states have call successors, (55), 10 states have call predecessors, (55), 10 states have return successors, (55), 52 states have call predecessors, (55), 55 states have call successors, (55) [2021-11-20 06:58:44,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 276 transitions. [2021-11-20 06:58:44,146 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 276 transitions. Word has length 52 [2021-11-20 06:58:44,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:58:44,147 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 276 transitions. [2021-11-20 06:58:44,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:58:44,147 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 276 transitions. [2021-11-20 06:58:44,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-20 06:58:44,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:58:44,149 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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] [2021-11-20 06:58:44,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-11-20 06:58:44,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-11-20 06:58:44,364 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:58:44,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:58:44,364 INFO L85 PathProgramCache]: Analyzing trace with hash 986268537, now seen corresponding path program 6 times [2021-11-20 06:58:44,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:58:44,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611905581] [2021-11-20 06:58:44,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:58:44,365 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:58:44,390 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:58:44,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28846265] [2021-11-20 06:58:44,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:58:44,391 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:58:44,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:58:44,393 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:58:44,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:58:44,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-20 06:58:44,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:58:44,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:58:44,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:58:44,728 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:58:44,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:58:44,906 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 06:58:44,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:58:44,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611905581] [2021-11-20 06:58:44,907 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:58:44,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28846265] [2021-11-20 06:58:44,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28846265] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:58:44,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:58:44,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-20 06:58:44,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338899827] [2021-11-20 06:58:44,909 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:58:44,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:58:44,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:58:44,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:58:44,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:58:44,911 INFO L87 Difference]: Start difference. First operand 214 states and 276 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:58:45,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:58:45,335 INFO L93 Difference]: Finished difference Result 243 states and 303 transitions. [2021-11-20 06:58:45,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 06:58:45,336 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 52 [2021-11-20 06:58:45,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:58:45,339 INFO L225 Difference]: With dead ends: 243 [2021-11-20 06:58:45,339 INFO L226 Difference]: Without dead ends: 239 [2021-11-20 06:58:45,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:58:45,361 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 97 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 06:58:45,362 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 246 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 06:58:45,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2021-11-20 06:58:45,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 219. [2021-11-20 06:58:45,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 152 states have (on average 1.118421052631579) internal successors, (170), 155 states have internal predecessors, (170), 55 states have call successors, (55), 11 states have call predecessors, (55), 11 states have return successors, (55), 52 states have call predecessors, (55), 55 states have call successors, (55) [2021-11-20 06:58:45,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 280 transitions. [2021-11-20 06:58:45,397 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 280 transitions. Word has length 52 [2021-11-20 06:58:45,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:58:45,398 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 280 transitions. [2021-11-20 06:58:45,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:58:45,399 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 280 transitions. [2021-11-20 06:58:45,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 06:58:45,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:58:45,400 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 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, 1] [2021-11-20 06:58:45,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:58:45,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:58:45,604 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:58:45,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:58:45,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1330474501, now seen corresponding path program 7 times [2021-11-20 06:58:45,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:58:45,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115144381] [2021-11-20 06:58:45,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:58:45,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:58:45,623 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:58:45,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156018650] [2021-11-20 06:58:45,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:58:45,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:58:45,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:58:45,625 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:58:45,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:58:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:58:45,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-20 06:58:45,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:58:45,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 10 treesize of output 8 [2021-11-20 06:58:45,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 06:58:45,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:45,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:45,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 54 treesize of output 43 [2021-11-20 06:58:46,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:46,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:46,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:46,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:46,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:46,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:46,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 73 [2021-11-20 06:58:54,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:54,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:54,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:54,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:54,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:54,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:58:54,929 INFO L354 Elim1Store]: treesize reduction 132, result has 39.7 percent of original size [2021-11-20 06:58:54,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 8 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 102 treesize of output 139 [2021-11-20 06:58:56,494 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-20 06:58:56,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 164 treesize of output 80 [2021-11-20 06:58:56,591 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 06:58:56,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:59:01,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:59:01,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115144381] [2021-11-20 06:59:01,293 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:59:01,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156018650] [2021-11-20 06:59:01,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156018650] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:59:01,293 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:59:01,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-11-20 06:59:01,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010584293] [2021-11-20 06:59:01,293 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:59:01,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-20 06:59:01,294 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:59:01,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-20 06:59:01,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2006, Unknown=4, NotChecked=0, Total=2256 [2021-11-20 06:59:01,296 INFO L87 Difference]: Start difference. First operand 219 states and 280 transitions. Second operand has 32 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 27 states have internal predecessors, (41), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 06:59:03,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:59:03,050 INFO L93 Difference]: Finished difference Result 265 states and 333 transitions. [2021-11-20 06:59:03,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 06:59:03,053 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 27 states have internal predecessors, (41), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 54 [2021-11-20 06:59:03,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:59:03,056 INFO L225 Difference]: With dead ends: 265 [2021-11-20 06:59:03,056 INFO L226 Difference]: Without dead ends: 261 [2021-11-20 06:59:03,058 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=252, Invalid=2096, Unknown=4, NotChecked=0, Total=2352 [2021-11-20 06:59:03,059 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 47 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 299 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:59:03,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 581 Invalid, 1347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1024 Invalid, 0 Unknown, 299 Unchecked, 1.6s Time] [2021-11-20 06:59:03,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-11-20 06:59:03,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 248. [2021-11-20 06:59:03,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 174 states have (on average 1.1149425287356323) internal successors, (194), 177 states have internal predecessors, (194), 59 states have call successors, (59), 14 states have call predecessors, (59), 14 states have return successors, (59), 56 states have call predecessors, (59), 59 states have call successors, (59) [2021-11-20 06:59:03,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 312 transitions. [2021-11-20 06:59:03,099 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 312 transitions. Word has length 54 [2021-11-20 06:59:03,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:59:03,099 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 312 transitions. [2021-11-20 06:59:03,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 27 states have internal predecessors, (41), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 06:59:03,100 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 312 transitions. [2021-11-20 06:59:03,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 06:59:03,101 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:59:03,102 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 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] [2021-11-20 06:59:03,151 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-20 06:59:03,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 06:59:03,328 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:59:03,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:59:03,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1367492605, now seen corresponding path program 8 times [2021-11-20 06:59:03,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:59:03,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456286444] [2021-11-20 06:59:03,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:03,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:59:03,350 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:59:03,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281276609] [2021-11-20 06:59:03,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:59:03,351 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:03,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:59:03,352 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:59:03,363 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 06:59:03,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:59:03,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:59:03,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:59:03,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:59:03,704 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:59:03,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:59:03,917 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 06:59:03,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:59:03,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456286444] [2021-11-20 06:59:03,917 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:59:03,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281276609] [2021-11-20 06:59:03,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281276609] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:59:03,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:59:03,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-20 06:59:03,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019598329] [2021-11-20 06:59:03,918 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:59:03,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 06:59:03,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:59:03,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 06:59:03,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:59:03,920 INFO L87 Difference]: Start difference. First operand 248 states and 312 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:59:04,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:59:04,826 INFO L93 Difference]: Finished difference Result 544 states and 693 transitions. [2021-11-20 06:59:04,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 06:59:04,827 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2021-11-20 06:59:04,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:59:04,831 INFO L225 Difference]: With dead ends: 544 [2021-11-20 06:59:04,832 INFO L226 Difference]: Without dead ends: 393 [2021-11-20 06:59:04,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:59:04,834 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 264 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 410 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:59:04,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 323 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 410 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 06:59:04,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-11-20 06:59:04,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 338. [2021-11-20 06:59:04,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 232 states have (on average 1.1163793103448276) internal successors, (259), 236 states have internal predecessors, (259), 89 states have call successors, (89), 16 states have call predecessors, (89), 16 states have return successors, (89), 85 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-20 06:59:04,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 437 transitions. [2021-11-20 06:59:04,885 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 437 transitions. Word has length 56 [2021-11-20 06:59:04,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:59:04,886 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 437 transitions. [2021-11-20 06:59:04,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:59:04,887 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 437 transitions. [2021-11-20 06:59:04,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-20 06:59:04,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:59:04,888 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 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] [2021-11-20 06:59:04,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 06:59:05,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:05,104 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:59:05,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:59:05,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1777525379, now seen corresponding path program 9 times [2021-11-20 06:59:05,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:59:05,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789861545] [2021-11-20 06:59:05,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:05,104 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:59:05,120 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:59:05,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156351871] [2021-11-20 06:59:05,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:59:05,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:05,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:59:05,122 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:59:05,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 06:59:05,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-20 06:59:05,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:59:05,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 06:59:05,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:59:05,441 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:59:05,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:59:05,618 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 06:59:05,618 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:59:05,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789861545] [2021-11-20 06:59:05,618 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:59:05,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156351871] [2021-11-20 06:59:05,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156351871] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:59:05,619 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:59:05,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-11-20 06:59:05,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491119036] [2021-11-20 06:59:05,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:59:05,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-20 06:59:05,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:59:05,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-20 06:59:05,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-11-20 06:59:05,621 INFO L87 Difference]: Start difference. First operand 338 states and 437 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:59:06,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:59:06,313 INFO L93 Difference]: Finished difference Result 372 states and 468 transitions. [2021-11-20 06:59:06,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 06:59:06,315 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2021-11-20 06:59:06,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:59:06,319 INFO L225 Difference]: With dead ends: 372 [2021-11-20 06:59:06,319 INFO L226 Difference]: Without dead ends: 368 [2021-11-20 06:59:06,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2021-11-20 06:59:06,321 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 133 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-20 06:59:06,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 378 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-20 06:59:06,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-11-20 06:59:06,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 340. [2021-11-20 06:59:06,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 234 states have (on average 1.1153846153846154) internal successors, (261), 238 states have internal predecessors, (261), 89 states have call successors, (89), 16 states have call predecessors, (89), 16 states have return successors, (89), 85 states have call predecessors, (89), 89 states have call successors, (89) [2021-11-20 06:59:06,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 439 transitions. [2021-11-20 06:59:06,369 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 439 transitions. Word has length 56 [2021-11-20 06:59:06,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:59:06,369 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 439 transitions. [2021-11-20 06:59:06,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:59:06,370 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 439 transitions. [2021-11-20 06:59:06,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 06:59:06,371 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:59:06,372 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:59:06,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-20 06:59:06,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:06,587 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:59:06,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:59:06,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1248328447, now seen corresponding path program 10 times [2021-11-20 06:59:06,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:59:06,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829095679] [2021-11-20 06:59:06,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:06,588 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:59:06,604 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:59:06,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1582836337] [2021-11-20 06:59:06,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:59:06,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:06,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:59:06,606 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:59:06,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 06:59:06,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:59:06,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:59:06,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-20 06:59:06,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:59:06,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 10 treesize of output 8 [2021-11-20 06:59:06,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 06:59:06,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:06,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:06,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 64 treesize of output 53 [2021-11-20 06:59:07,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:07,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:07,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:07,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:07,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:07,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:07,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2021-11-20 06:59:07,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:07,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:07,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:07,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:07,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:07,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:07,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:07,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:07,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:07,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:07,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:07,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:07,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 97 [2021-11-20 06:59:10,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:10,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:10,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:10,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:10,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:10,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:10,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:10,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:10,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:10,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:10,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:10,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:10,614 INFO L354 Elim1Store]: treesize reduction 180, result has 39.4 percent of original size [2021-11-20 06:59:10,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 14 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 8 case distinctions, treesize of input 120 treesize of output 175 [2021-11-20 06:59:13,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:13,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:13,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:59:13,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:13,876 INFO L354 Elim1Store]: treesize reduction 52, result has 17.5 percent of original size [2021-11-20 06:59:13,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 256 treesize of output 126 [2021-11-20 06:59:14,157 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:59:14,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:59:28,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:59:28,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829095679] [2021-11-20 06:59:28,511 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:59:28,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582836337] [2021-11-20 06:59:28,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582836337] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:59:28,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:59:28,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2021-11-20 06:59:28,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149740915] [2021-11-20 06:59:28,512 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 06:59:28,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-20 06:59:28,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:59:28,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-20 06:59:28,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=2572, Unknown=4, NotChecked=0, Total=2970 [2021-11-20 06:59:28,514 INFO L87 Difference]: Start difference. First operand 340 states and 439 transitions. Second operand has 32 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 06:59:31,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:59:31,688 INFO L93 Difference]: Finished difference Result 382 states and 490 transitions. [2021-11-20 06:59:31,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 06:59:31,695 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 58 [2021-11-20 06:59:31,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:59:31,699 INFO L225 Difference]: With dead ends: 382 [2021-11-20 06:59:31,699 INFO L226 Difference]: Without dead ends: 378 [2021-11-20 06:59:31,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=454, Invalid=2964, Unknown=4, NotChecked=0, Total=3422 [2021-11-20 06:59:31,702 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 57 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 1324 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 455 SdHoareTripleChecker+Invalid, 1460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:59:31,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 455 Invalid, 1460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1324 Invalid, 0 Unknown, 106 Unchecked, 2.2s Time] [2021-11-20 06:59:31,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-11-20 06:59:31,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 361. [2021-11-20 06:59:31,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 250 states have (on average 1.116) internal successors, (279), 254 states have internal predecessors, (279), 93 states have call successors, (93), 17 states have call predecessors, (93), 17 states have return successors, (93), 89 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-20 06:59:31,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 465 transitions. [2021-11-20 06:59:31,757 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 465 transitions. Word has length 58 [2021-11-20 06:59:31,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:59:31,757 INFO L470 AbstractCegarLoop]: Abstraction has 361 states and 465 transitions. [2021-11-20 06:59:31,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 06:59:31,758 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 465 transitions. [2021-11-20 06:59:31,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 06:59:31,759 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:59:31,760 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:59:31,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-20 06:59:31,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 06:59:31,976 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:59:31,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:59:31,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1400995841, now seen corresponding path program 11 times [2021-11-20 06:59:31,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:59:31,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960708169] [2021-11-20 06:59:31,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:31,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:59:31,993 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:59:31,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [20993257] [2021-11-20 06:59:31,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:59:31,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:31,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:59:32,012 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:59:32,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-20 06:59:32,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-20 06:59:32,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:59:32,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:59:32,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:59:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 41 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:59:32,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:59:32,648 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 06:59:32,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:59:32,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960708169] [2021-11-20 06:59:32,649 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:59:32,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20993257] [2021-11-20 06:59:32,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20993257] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:59:32,649 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:59:32,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-11-20 06:59:32,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628146381] [2021-11-20 06:59:32,650 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:59:32,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:59:32,650 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:59:32,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:59:32,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:59:32,651 INFO L87 Difference]: Start difference. First operand 361 states and 465 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:59:33,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:59:33,932 INFO L93 Difference]: Finished difference Result 849 states and 1100 transitions. [2021-11-20 06:59:33,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 06:59:33,933 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 60 [2021-11-20 06:59:33,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:59:33,939 INFO L225 Difference]: With dead ends: 849 [2021-11-20 06:59:33,939 INFO L226 Difference]: Without dead ends: 604 [2021-11-20 06:59:33,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 06:59:33,943 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 409 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:59:33,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 404 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 06:59:33,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-11-20 06:59:34,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 471. [2021-11-20 06:59:34,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 320 states have (on average 1.11875) internal successors, (358), 325 states have internal predecessors, (358), 131 states have call successors, (131), 19 states have call predecessors, (131), 19 states have return successors, (131), 126 states have call predecessors, (131), 131 states have call successors, (131) [2021-11-20 06:59:34,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 620 transitions. [2021-11-20 06:59:34,022 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 620 transitions. Word has length 60 [2021-11-20 06:59:34,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:59:34,023 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 620 transitions. [2021-11-20 06:59:34,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:59:34,023 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 620 transitions. [2021-11-20 06:59:34,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 06:59:34,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:59:34,025 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:59:34,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-20 06:59:34,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-20 06:59:34,248 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:59:34,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:59:34,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1599277695, now seen corresponding path program 12 times [2021-11-20 06:59:34,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:59:34,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848724976] [2021-11-20 06:59:34,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:34,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:59:34,263 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:59:34,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2074099474] [2021-11-20 06:59:34,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:59:34,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:34,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:59:34,265 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:59:34,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-20 06:59:34,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-20 06:59:34,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:59:34,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 06:59:34,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:59:34,737 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:59:34,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:59:34,948 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 06:59:34,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:59:34,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848724976] [2021-11-20 06:59:34,949 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:59:34,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074099474] [2021-11-20 06:59:34,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074099474] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:59:34,949 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:59:34,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-11-20 06:59:34,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840678910] [2021-11-20 06:59:34,949 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:59:34,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-20 06:59:34,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:59:34,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-20 06:59:34,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-11-20 06:59:34,951 INFO L87 Difference]: Start difference. First operand 471 states and 620 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:59:36,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:59:36,378 INFO L93 Difference]: Finished difference Result 523 states and 668 transitions. [2021-11-20 06:59:36,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-20 06:59:36,378 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 60 [2021-11-20 06:59:36,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:59:36,385 INFO L225 Difference]: With dead ends: 523 [2021-11-20 06:59:36,385 INFO L226 Difference]: Without dead ends: 519 [2021-11-20 06:59:36,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2021-11-20 06:59:36,388 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 191 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:59:36,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 462 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-20 06:59:36,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2021-11-20 06:59:36,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 473. [2021-11-20 06:59:36,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 322 states have (on average 1.1180124223602483) internal successors, (360), 327 states have internal predecessors, (360), 131 states have call successors, (131), 19 states have call predecessors, (131), 19 states have return successors, (131), 126 states have call predecessors, (131), 131 states have call successors, (131) [2021-11-20 06:59:36,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 622 transitions. [2021-11-20 06:59:36,465 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 622 transitions. Word has length 60 [2021-11-20 06:59:36,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:59:36,465 INFO L470 AbstractCegarLoop]: Abstraction has 473 states and 622 transitions. [2021-11-20 06:59:36,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 18 states have internal predecessors, (51), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 06:59:36,466 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 622 transitions. [2021-11-20 06:59:36,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-20 06:59:36,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:59:36,470 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:59:36,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-20 06:59:36,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-20 06:59:36,690 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:59:36,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:59:36,690 INFO L85 PathProgramCache]: Analyzing trace with hash 745660931, now seen corresponding path program 13 times [2021-11-20 06:59:36,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:59:36,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464353223] [2021-11-20 06:59:36,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:59:36,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:59:36,710 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:59:36,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [90777965] [2021-11-20 06:59:36,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 06:59:36,716 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:59:36,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:59:36,718 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:59:36,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-20 06:59:37,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:59:37,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-20 06:59:37,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:59:37,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 10 treesize of output 8 [2021-11-20 06:59:37,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 06:59:37,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 64 treesize of output 53 [2021-11-20 06:59:37,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2021-11-20 06:59:37,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 91 [2021-11-20 06:59:37,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:37,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 121 [2021-11-20 06:59:55,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:55,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:55,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:55,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:55,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:55,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:55,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:55,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:55,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:55,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:55,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:55,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:55,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:55,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:55,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:55,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:55,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:55,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:55,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:55,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:59:55,655 INFO L354 Elim1Store]: treesize reduction 228, result has 39.2 percent of original size [2021-11-20 06:59:55,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 22 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 10 case distinctions, treesize of input 138 treesize of output 211 [2021-11-20 07:00:01,306 INFO L354 Elim1Store]: treesize reduction 37, result has 9.8 percent of original size [2021-11-20 07:00:01,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 354 treesize of output 166 [2021-11-20 07:00:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 20 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:00:01,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:00:06,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:00:06,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464353223] [2021-11-20 07:00:06,128 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:00:06,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90777965] [2021-11-20 07:00:06,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90777965] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:00:06,128 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:00:06,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2021-11-20 07:00:06,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149250283] [2021-11-20 07:00:06,128 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:00:06,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-20 07:00:06,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:00:06,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-20 07:00:06,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2712, Unknown=8, NotChecked=0, Total=2970 [2021-11-20 07:00:06,131 INFO L87 Difference]: Start difference. First operand 473 states and 622 transitions. Second operand has 39 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 36 states have internal predecessors, (52), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:00:09,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:00:09,426 INFO L93 Difference]: Finished difference Result 526 states and 682 transitions. [2021-11-20 07:00:09,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-20 07:00:09,427 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 36 states have internal predecessors, (52), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 62 [2021-11-20 07:00:09,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:00:09,431 INFO L225 Difference]: With dead ends: 526 [2021-11-20 07:00:09,431 INFO L226 Difference]: Without dead ends: 522 [2021-11-20 07:00:09,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1097 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=266, Invalid=2918, Unknown=8, NotChecked=0, Total=3192 [2021-11-20 07:00:09,434 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 58 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 1607 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 1813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:00:09,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 553 Invalid, 1813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1607 Invalid, 0 Unknown, 162 Unchecked, 2.8s Time] [2021-11-20 07:00:09,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2021-11-20 07:00:09,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 502. [2021-11-20 07:00:09,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 344 states have (on average 1.1162790697674418) internal successors, (384), 349 states have internal predecessors, (384), 135 states have call successors, (135), 22 states have call predecessors, (135), 22 states have return successors, (135), 130 states have call predecessors, (135), 135 states have call successors, (135) [2021-11-20 07:00:09,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 654 transitions. [2021-11-20 07:00:09,511 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 654 transitions. Word has length 62 [2021-11-20 07:00:09,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:00:09,511 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 654 transitions. [2021-11-20 07:00:09,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 36 states have internal predecessors, (52), 5 states have call successors, (5), 4 states have call predecessors, (5), 5 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:00:09,512 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 654 transitions. [2021-11-20 07:00:09,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-20 07:00:09,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:00:09,514 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:00:09,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-20 07:00:09,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:00:09,740 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:00:09,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:00:09,740 INFO L85 PathProgramCache]: Analyzing trace with hash -626149883, now seen corresponding path program 14 times [2021-11-20 07:00:09,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:00:09,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833169143] [2021-11-20 07:00:09,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:00:09,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:00:09,761 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:00:09,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865903460] [2021-11-20 07:00:09,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:00:09,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:00:09,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:00:09,765 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:00:09,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-20 07:00:09,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:00:09,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:00:09,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 07:00:09,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:00:10,141 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 52 proven. 25 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:00:10,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:00:10,393 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 07:00:10,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:00:10,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833169143] [2021-11-20 07:00:10,394 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:00:10,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865903460] [2021-11-20 07:00:10,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865903460] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:00:10,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:00:10,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-20 07:00:10,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460777132] [2021-11-20 07:00:10,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:00:10,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 07:00:10,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:00:10,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 07:00:10,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-11-20 07:00:10,396 INFO L87 Difference]: Start difference. First operand 502 states and 654 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 07:00:12,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:00:12,550 INFO L93 Difference]: Finished difference Result 1241 states and 1622 transitions. [2021-11-20 07:00:12,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-20 07:00:12,551 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 64 [2021-11-20 07:00:12,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:00:12,559 INFO L225 Difference]: With dead ends: 1241 [2021-11-20 07:00:12,559 INFO L226 Difference]: Without dead ends: 882 [2021-11-20 07:00:12,562 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=475, Invalid=1417, Unknown=0, NotChecked=0, Total=1892 [2021-11-20 07:00:12,563 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 604 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 841 mSolverCounterSat, 533 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 533 IncrementalHoareTripleChecker+Valid, 841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:00:12,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [628 Valid, 494 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [533 Valid, 841 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-20 07:00:12,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-11-20 07:00:12,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 634. [2021-11-20 07:00:12,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 428 states have (on average 1.1191588785046729) internal successors, (479), 434 states have internal predecessors, (479), 181 states have call successors, (181), 24 states have call predecessors, (181), 24 states have return successors, (181), 175 states have call predecessors, (181), 181 states have call successors, (181) [2021-11-20 07:00:12,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 841 transitions. [2021-11-20 07:00:12,687 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 841 transitions. Word has length 64 [2021-11-20 07:00:12,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:00:12,688 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 841 transitions. [2021-11-20 07:00:12,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 07:00:12,689 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 841 transitions. [2021-11-20 07:00:12,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-20 07:00:12,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:00:12,692 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:00:12,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-20 07:00:12,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-20 07:00:12,916 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:00:12,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:00:12,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1965962363, now seen corresponding path program 15 times [2021-11-20 07:00:12,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:00:12,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820308736] [2021-11-20 07:00:12,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:00:12,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:00:12,940 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:00:12,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638990399] [2021-11-20 07:00:12,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:00:12,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:00:12,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:00:12,942 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:00:12,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-20 07:00:13,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-20 07:00:13,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:00:13,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-20 07:00:13,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:00:13,626 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 41 proven. 36 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:00:13,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:00:13,954 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 07:00:13,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:00:13,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820308736] [2021-11-20 07:00:13,954 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:00:13,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638990399] [2021-11-20 07:00:13,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638990399] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:00:13,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:00:13,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-11-20 07:00:13,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858878643] [2021-11-20 07:00:13,955 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:00:13,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-20 07:00:13,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:00:13,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-20 07:00:13,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-11-20 07:00:13,957 INFO L87 Difference]: Start difference. First operand 634 states and 841 transitions. Second operand has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 07:00:15,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:00:15,785 INFO L93 Difference]: Finished difference Result 708 states and 910 transitions. [2021-11-20 07:00:15,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 07:00:15,785 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 64 [2021-11-20 07:00:15,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:00:15,791 INFO L225 Difference]: With dead ends: 708 [2021-11-20 07:00:15,791 INFO L226 Difference]: Without dead ends: 704 [2021-11-20 07:00:15,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=279, Invalid=843, Unknown=0, NotChecked=0, Total=1122 [2021-11-20 07:00:15,795 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 201 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:00:15,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 643 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-20 07:00:15,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2021-11-20 07:00:15,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 636. [2021-11-20 07:00:15,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 636 states, 430 states have (on average 1.1186046511627907) internal successors, (481), 436 states have internal predecessors, (481), 181 states have call successors, (181), 24 states have call predecessors, (181), 24 states have return successors, (181), 175 states have call predecessors, (181), 181 states have call successors, (181) [2021-11-20 07:00:15,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 636 states to 636 states and 843 transitions. [2021-11-20 07:00:15,891 INFO L78 Accepts]: Start accepts. Automaton has 636 states and 843 transitions. Word has length 64 [2021-11-20 07:00:15,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:00:15,892 INFO L470 AbstractCegarLoop]: Abstraction has 636 states and 843 transitions. [2021-11-20 07:00:15,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.7142857142857144) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 07:00:15,892 INFO L276 IsEmpty]: Start isEmpty. Operand 636 states and 843 transitions. [2021-11-20 07:00:15,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-20 07:00:15,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:00:15,894 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:00:15,941 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-20 07:00:16,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:00:16,108 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:00:16,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:00:16,108 INFO L85 PathProgramCache]: Analyzing trace with hash 549013255, now seen corresponding path program 16 times [2021-11-20 07:00:16,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:00:16,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382287345] [2021-11-20 07:00:16,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:00:16,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:00:16,129 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:00:16,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [3308579] [2021-11-20 07:00:16,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:00:16,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:00:16,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:00:16,133 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:00:16,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-20 07:00:16,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:00:16,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:00:16,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-20 07:00:16,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:00:16,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 10 treesize of output 8 [2021-11-20 07:00:16,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 07:00:16,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:16,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:16,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 54 treesize of output 43 [2021-11-20 07:00:16,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:16,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:16,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:16,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:16,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:16,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:16,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2021-11-20 07:00:17,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 97 [2021-11-20 07:00:17,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 115 [2021-11-20 07:00:17,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:17,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 132 treesize of output 145 [2021-11-20 07:00:21,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:21,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:21,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:21,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:21,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:21,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:21,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:21,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:21,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:21,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:21,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:21,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:21,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:22,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:22,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:22,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:22,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:22,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:22,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:22,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:22,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:22,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:22,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:22,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:22,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:22,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:22,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:22,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:22,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:22,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:22,239 INFO L354 Elim1Store]: treesize reduction 276, result has 39.1 percent of original size [2021-11-20 07:00:22,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 32 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 12 case distinctions, treesize of input 156 treesize of output 247 [2021-11-20 07:00:31,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:31,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:31,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:31,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:00:31,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:31,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:00:31,964 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-11-20 07:00:31,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 15 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 474 treesize of output 224 [2021-11-20 07:00:32,380 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 16 proven. 81 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:00:32,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:00:42,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:00:42,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382287345] [2021-11-20 07:00:42,699 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:00:42,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3308579] [2021-11-20 07:00:42,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3308579] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:00:42,699 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:00:42,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2021-11-20 07:00:42,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141166083] [2021-11-20 07:00:42,700 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:00:42,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-20 07:00:42,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:00:42,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-20 07:00:42,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=2968, Unknown=1, NotChecked=0, Total=3422 [2021-11-20 07:00:42,702 INFO L87 Difference]: Start difference. First operand 636 states and 843 transitions. Second operand has 39 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 38 states have internal predecessors, (50), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:00:47,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:00:47,595 INFO L93 Difference]: Finished difference Result 684 states and 900 transitions. [2021-11-20 07:00:47,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-20 07:00:47,595 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 38 states have internal predecessors, (50), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 66 [2021-11-20 07:00:47,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:00:47,601 INFO L225 Difference]: With dead ends: 684 [2021-11-20 07:00:47,601 INFO L226 Difference]: Without dead ends: 680 [2021-11-20 07:00:47,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=519, Invalid=3386, Unknown=1, NotChecked=0, Total=3906 [2021-11-20 07:00:47,604 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 52 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 2183 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 2422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 2183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2021-11-20 07:00:47,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 625 Invalid, 2422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 2183 Invalid, 0 Unknown, 197 Unchecked, 3.6s Time] [2021-11-20 07:00:47,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-11-20 07:00:47,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 657. [2021-11-20 07:00:47,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 446 states have (on average 1.1188340807174888) internal successors, (499), 452 states have internal predecessors, (499), 185 states have call successors, (185), 25 states have call predecessors, (185), 25 states have return successors, (185), 179 states have call predecessors, (185), 185 states have call successors, (185) [2021-11-20 07:00:47,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 869 transitions. [2021-11-20 07:00:47,709 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 869 transitions. Word has length 66 [2021-11-20 07:00:47,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:00:47,709 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 869 transitions. [2021-11-20 07:00:47,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.3513513513513513) internal successors, (50), 38 states have internal predecessors, (50), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:00:47,710 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 869 transitions. [2021-11-20 07:00:47,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 07:00:47,712 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:00:47,712 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:00:47,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-20 07:00:47,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:00:47,931 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:00:47,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:00:47,932 INFO L85 PathProgramCache]: Analyzing trace with hash -626005495, now seen corresponding path program 17 times [2021-11-20 07:00:47,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:00:47,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311127203] [2021-11-20 07:00:47,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:00:47,932 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:00:47,954 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:00:47,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [402334624] [2021-11-20 07:00:47,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:00:47,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:00:47,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:00:47,956 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:00:47,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-20 07:00:48,362 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-20 07:00:48,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:00:48,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 07:00:48,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:00:48,718 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 65 proven. 36 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:00:48,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:00:49,093 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 49 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 07:00:49,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:00:49,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311127203] [2021-11-20 07:00:49,093 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:00:49,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402334624] [2021-11-20 07:00:49,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402334624] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:00:49,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:00:49,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-11-20 07:00:49,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899179044] [2021-11-20 07:00:49,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:00:49,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 07:00:49,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:00:49,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 07:00:49,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2021-11-20 07:00:49,096 INFO L87 Difference]: Start difference. First operand 657 states and 869 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 07:00:51,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:00:51,747 INFO L93 Difference]: Finished difference Result 1708 states and 2251 transitions. [2021-11-20 07:00:51,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-20 07:00:51,748 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 68 [2021-11-20 07:00:51,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:00:51,756 INFO L225 Difference]: With dead ends: 1708 [2021-11-20 07:00:51,757 INFO L226 Difference]: Without dead ends: 1213 [2021-11-20 07:00:51,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=698, Invalid=2272, Unknown=0, NotChecked=0, Total=2970 [2021-11-20 07:00:51,761 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 1150 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 889 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 1889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 889 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:00:51,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1178 Valid, 531 Invalid, 1889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [889 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-11-20 07:00:51,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-11-20 07:00:51,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 811. [2021-11-20 07:00:51,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 811 states, 544 states have (on average 1.1213235294117647) internal successors, (610), 551 states have internal predecessors, (610), 239 states have call successors, (239), 27 states have call predecessors, (239), 27 states have return successors, (239), 232 states have call predecessors, (239), 239 states have call successors, (239) [2021-11-20 07:00:51,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 811 states to 811 states and 1088 transitions. [2021-11-20 07:00:51,885 INFO L78 Accepts]: Start accepts. Automaton has 811 states and 1088 transitions. Word has length 68 [2021-11-20 07:00:51,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:00:51,886 INFO L470 AbstractCegarLoop]: Abstraction has 811 states and 1088 transitions. [2021-11-20 07:00:51,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 07:00:51,886 INFO L276 IsEmpty]: Start isEmpty. Operand 811 states and 1088 transitions. [2021-11-20 07:00:51,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 07:00:51,890 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:00:51,890 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:00:51,935 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-20 07:00:52,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-20 07:00:52,116 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:00:52,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:00:52,116 INFO L85 PathProgramCache]: Analyzing trace with hash 304390025, now seen corresponding path program 18 times [2021-11-20 07:00:52,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:00:52,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42676850] [2021-11-20 07:00:52,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:00:52,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:00:52,143 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:00:52,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296179307] [2021-11-20 07:00:52,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:00:52,143 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:00:52,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:00:52,145 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:00:52,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-20 07:00:52,583 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-11-20 07:00:52,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:00:52,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-20 07:00:52,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:00:52,866 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 52 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:00:52,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:00:53,152 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 07:00:53,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:00:53,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42676850] [2021-11-20 07:00:53,153 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:00:53,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296179307] [2021-11-20 07:00:53,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296179307] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:00:53,153 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:00:53,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-11-20 07:00:53,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78584147] [2021-11-20 07:00:53,154 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:00:53,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-20 07:00:53,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:00:53,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-20 07:00:53,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2021-11-20 07:00:53,155 INFO L87 Difference]: Start difference. First operand 811 states and 1088 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 07:00:54,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:00:54,981 INFO L93 Difference]: Finished difference Result 911 states and 1182 transitions. [2021-11-20 07:00:54,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-20 07:00:54,984 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 68 [2021-11-20 07:00:54,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:00:54,990 INFO L225 Difference]: With dead ends: 911 [2021-11-20 07:00:54,990 INFO L226 Difference]: Without dead ends: 907 [2021-11-20 07:00:54,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=1123, Unknown=0, NotChecked=0, Total=1482 [2021-11-20 07:00:54,992 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 238 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 876 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:00:54,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 876 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-11-20 07:00:54,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2021-11-20 07:00:55,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 813. [2021-11-20 07:00:55,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 546 states have (on average 1.120879120879121) internal successors, (612), 553 states have internal predecessors, (612), 239 states have call successors, (239), 27 states have call predecessors, (239), 27 states have return successors, (239), 232 states have call predecessors, (239), 239 states have call successors, (239) [2021-11-20 07:00:55,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 1090 transitions. [2021-11-20 07:00:55,123 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 1090 transitions. Word has length 68 [2021-11-20 07:00:55,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:00:55,124 INFO L470 AbstractCegarLoop]: Abstraction has 813 states and 1090 transitions. [2021-11-20 07:00:55,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 24 states have internal predecessors, (63), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 07:00:55,124 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 1090 transitions. [2021-11-20 07:00:55,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-20 07:00:55,129 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:00:55,129 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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, 1, 1, 1, 1, 1] [2021-11-20 07:00:55,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-20 07:00:55,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:00:55,340 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:00:55,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:00:55,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1906516020, now seen corresponding path program 1 times [2021-11-20 07:00:55,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:00:55,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511376813] [2021-11-20 07:00:55,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:00:55,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:00:55,353 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:00:55,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1678111376] [2021-11-20 07:00:55,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:00:55,353 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:00:55,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:00:55,354 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:00:55,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-20 07:00:55,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:00:55,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-20 07:00:55,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:00:55,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 10 treesize of output 8 [2021-11-20 07:00:55,868 INFO L354 Elim1Store]: treesize reduction 45, result has 22.4 percent of original size [2021-11-20 07:00:55,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 1 case distinctions, treesize of input 59 treesize of output 40 [2021-11-20 07:01:18,496 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-11-20 07:01:18,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 33 [2021-11-20 07:01:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 79 proven. 69 refuted. 2 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-20 07:01:18,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:01:19,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:01:19,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511376813] [2021-11-20 07:01:19,256 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:01:19,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678111376] [2021-11-20 07:01:19,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678111376] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:01:19,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:01:19,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-20 07:01:19,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562416376] [2021-11-20 07:01:19,257 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:01:19,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-20 07:01:19,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:01:19,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-20 07:01:19,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=545, Unknown=6, NotChecked=0, Total=650 [2021-11-20 07:01:19,258 INFO L87 Difference]: Start difference. First operand 813 states and 1090 transitions. Second operand has 22 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-20 07:01:25,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:01:25,854 INFO L93 Difference]: Finished difference Result 837 states and 1112 transitions. [2021-11-20 07:01:25,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-20 07:01:25,856 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 73 [2021-11-20 07:01:25,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:01:25,860 INFO L225 Difference]: With dead ends: 837 [2021-11-20 07:01:25,860 INFO L226 Difference]: Without dead ends: 700 [2021-11-20 07:01:25,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 23.4s TimeCoverageRelationStatistics Valid=188, Invalid=993, Unknown=9, NotChecked=0, Total=1190 [2021-11-20 07:01:25,862 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 30 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:01:25,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 258 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 160 Invalid, 0 Unknown, 113 Unchecked, 0.3s Time] [2021-11-20 07:01:25,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-11-20 07:01:26,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 700. [2021-11-20 07:01:26,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 700 states, 472 states have (on average 1.1207627118644068) internal successors, (529), 478 states have internal predecessors, (529), 205 states have call successors, (205), 22 states have call predecessors, (205), 22 states have return successors, (205), 199 states have call predecessors, (205), 205 states have call successors, (205) [2021-11-20 07:01:26,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 939 transitions. [2021-11-20 07:01:26,012 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 939 transitions. Word has length 73 [2021-11-20 07:01:26,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:01:26,013 INFO L470 AbstractCegarLoop]: Abstraction has 700 states and 939 transitions. [2021-11-20 07:01:26,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 20 states have internal predecessors, (52), 6 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-20 07:01:26,013 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 939 transitions. [2021-11-20 07:01:26,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-20 07:01:26,016 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:01:26,016 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:01:26,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-20 07:01:26,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-20 07:01:26,244 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:01:26,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:01:26,244 INFO L85 PathProgramCache]: Analyzing trace with hash 514271755, now seen corresponding path program 19 times [2021-11-20 07:01:26,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:01:26,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518308017] [2021-11-20 07:01:26,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:01:26,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:01:26,256 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:01:26,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399436578] [2021-11-20 07:01:26,257 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:01:26,257 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:01:26,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:01:26,258 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:01:26,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-20 07:01:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:01:26,655 WARN L261 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-20 07:01:26,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:01:26,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 10 treesize of output 8 [2021-11-20 07:01:26,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 07:01:26,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:26,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:26,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 64 treesize of output 53 [2021-11-20 07:01:27,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 83 [2021-11-20 07:01:27,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 112 treesize of output 113 [2021-11-20 07:01:27,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:27,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 115 [2021-11-20 07:01:28,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 139 [2021-11-20 07:01:28,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:01:28,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 43 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 169 [2021-11-20 07:02:01,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:02:01,862 INFO L354 Elim1Store]: treesize reduction 324, result has 39.0 percent of original size [2021-11-20 07:02:01,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 44 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 14 case distinctions, treesize of input 174 treesize of output 283 [2021-11-20 07:02:18,757 INFO L354 Elim1Store]: treesize reduction 53, result has 7.0 percent of original size [2021-11-20 07:02:18,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 21 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 600 treesize of output 276 [2021-11-20 07:02:19,144 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 16 proven. 114 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-20 07:02:19,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:02:34,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:34,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518308017] [2021-11-20 07:02:34,090 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:02:34,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399436578] [2021-11-20 07:02:34,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399436578] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:02:34,091 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:02:34,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2021-11-20 07:02:34,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868212782] [2021-11-20 07:02:34,091 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:02:34,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-20 07:02:34,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:34,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-20 07:02:34,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=4605, Unknown=12, NotChecked=0, Total=4970 [2021-11-20 07:02:34,094 INFO L87 Difference]: Start difference. First operand 700 states and 939 transitions. Second operand has 48 states, 45 states have (on average 1.2) internal successors, (54), 43 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:02:51,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:51,282 INFO L93 Difference]: Finished difference Result 758 states and 1004 transitions. [2021-11-20 07:02:51,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-20 07:02:51,287 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 1.2) internal successors, (54), 43 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 70 [2021-11-20 07:02:51,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:51,294 INFO L225 Difference]: With dead ends: 758 [2021-11-20 07:02:51,295 INFO L226 Difference]: Without dead ends: 754 [2021-11-20 07:02:51,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2494 ImplicationChecksByTransitivity, 60.2s TimeCoverageRelationStatistics Valid=516, Invalid=7844, Unknown=12, NotChecked=0, Total=8372 [2021-11-20 07:02:51,300 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 89 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 2471 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 2839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 2471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 285 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:51,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 634 Invalid, 2839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 2471 Invalid, 0 Unknown, 285 Unchecked, 7.2s Time] [2021-11-20 07:02:51,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-11-20 07:02:51,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 731. [2021-11-20 07:02:51,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 731 states, 495 states have (on average 1.1191919191919193) internal successors, (554), 502 states have internal predecessors, (554), 210 states have call successors, (210), 25 states have call predecessors, (210), 25 states have return successors, (210), 203 states have call predecessors, (210), 210 states have call successors, (210) [2021-11-20 07:02:51,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 974 transitions. [2021-11-20 07:02:51,432 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 974 transitions. Word has length 70 [2021-11-20 07:02:51,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:51,432 INFO L470 AbstractCegarLoop]: Abstraction has 731 states and 974 transitions. [2021-11-20 07:02:51,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 1.2) internal successors, (54), 43 states have internal predecessors, (54), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:02:51,433 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 974 transitions. [2021-11-20 07:02:51,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-20 07:02:51,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:51,436 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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, 1, 1, 1] [2021-11-20 07:02:51,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:51,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-20 07:02:51,650 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:02:51,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:51,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1716998410, now seen corresponding path program 2 times [2021-11-20 07:02:51,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:51,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144755660] [2021-11-20 07:02:51,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:51,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:51,664 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:02:51,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1634039182] [2021-11-20 07:02:51,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:02:51,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:51,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:51,666 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:51,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-20 07:02:51,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:02:51,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:02:51,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:02:51,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:51,981 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2021-11-20 07:02:51,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:02:52,201 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-20 07:02:52,202 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:52,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144755660] [2021-11-20 07:02:52,202 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:02:52,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634039182] [2021-11-20 07:02:52,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634039182] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:02:52,202 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:02:52,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-20 07:02:52,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58160493] [2021-11-20 07:02:52,203 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:02:52,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 07:02:52,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:52,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 07:02:52,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-20 07:02:52,204 INFO L87 Difference]: Start difference. First operand 731 states and 974 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 07:02:52,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:52,585 INFO L93 Difference]: Finished difference Result 758 states and 1000 transitions. [2021-11-20 07:02:52,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 07:02:52,585 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 75 [2021-11-20 07:02:52,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:52,590 INFO L225 Difference]: With dead ends: 758 [2021-11-20 07:02:52,591 INFO L226 Difference]: Without dead ends: 754 [2021-11-20 07:02:52,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:02:52,593 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 57 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:52,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 91 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:02:52,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-11-20 07:02:52,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 728. [2021-11-20 07:02:52,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 492 states have (on average 1.1178861788617886) internal successors, (550), 499 states have internal predecessors, (550), 210 states have call successors, (210), 25 states have call predecessors, (210), 25 states have return successors, (210), 203 states have call predecessors, (210), 210 states have call successors, (210) [2021-11-20 07:02:52,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 970 transitions. [2021-11-20 07:02:52,725 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 970 transitions. Word has length 75 [2021-11-20 07:02:52,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:52,726 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 970 transitions. [2021-11-20 07:02:52,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 07:02:52,727 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 970 transitions. [2021-11-20 07:02:52,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-20 07:02:52,729 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:52,729 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:02:52,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:52,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:52,956 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:02:52,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:52,956 INFO L85 PathProgramCache]: Analyzing trace with hash 347151373, now seen corresponding path program 20 times [2021-11-20 07:02:52,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:52,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95372600] [2021-11-20 07:02:52,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:52,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:52,976 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:02:52,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1704910267] [2021-11-20 07:02:52,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:02:52,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:52,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:52,979 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:52,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-20 07:02:53,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:02:53,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:02:53,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 07:02:53,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:02:53,476 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 80 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:02:53,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:02:54,000 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 64 proven. 49 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 07:02:54,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:02:54,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95372600] [2021-11-20 07:02:54,001 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:02:54,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704910267] [2021-11-20 07:02:54,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704910267] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:02:54,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:02:54,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2021-11-20 07:02:54,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556458083] [2021-11-20 07:02:54,002 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:02:54,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 07:02:54,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:02:54,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 07:02:54,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-11-20 07:02:54,004 INFO L87 Difference]: Start difference. First operand 728 states and 970 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 07:02:59,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:02:59,081 INFO L93 Difference]: Finished difference Result 1973 states and 2601 transitions. [2021-11-20 07:02:59,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-20 07:02:59,082 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 72 [2021-11-20 07:02:59,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:02:59,094 INFO L225 Difference]: With dead ends: 1973 [2021-11-20 07:02:59,095 INFO L226 Difference]: Without dead ends: 1409 [2021-11-20 07:02:59,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=921, Invalid=3239, Unknown=0, NotChecked=0, Total=4160 [2021-11-20 07:02:59,100 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 966 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 1607 mSolverCounterSat, 1034 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 998 SdHoareTripleChecker+Valid, 923 SdHoareTripleChecker+Invalid, 2641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1034 IncrementalHoareTripleChecker+Valid, 1607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:02:59,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [998 Valid, 923 Invalid, 2641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1034 Valid, 1607 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-20 07:02:59,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2021-11-20 07:02:59,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 891. [2021-11-20 07:02:59,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 596 states have (on average 1.1208053691275168) internal successors, (668), 603 states have internal predecessors, (668), 267 states have call successors, (267), 27 states have call predecessors, (267), 27 states have return successors, (267), 260 states have call predecessors, (267), 267 states have call successors, (267) [2021-11-20 07:02:59,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 1202 transitions. [2021-11-20 07:02:59,297 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 1202 transitions. Word has length 72 [2021-11-20 07:02:59,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:02:59,297 INFO L470 AbstractCegarLoop]: Abstraction has 891 states and 1202 transitions. [2021-11-20 07:02:59,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 07:02:59,298 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 1202 transitions. [2021-11-20 07:02:59,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-20 07:02:59,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:02:59,300 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:02:59,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-20 07:02:59,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:59,501 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:02:59,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:02:59,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1104048525, now seen corresponding path program 21 times [2021-11-20 07:02:59,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:02:59,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380184458] [2021-11-20 07:02:59,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:02:59,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:02:59,516 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:02:59,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [774302337] [2021-11-20 07:02:59,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:02:59,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:02:59,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:02:59,522 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:02:59,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-20 07:02:59,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-20 07:02:59,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:02:59,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-20 07:02:59,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:00,300 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 65 proven. 64 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:03:00,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:03:00,800 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 07:03:00,801 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:03:00,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380184458] [2021-11-20 07:03:00,801 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:03:00,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774302337] [2021-11-20 07:03:00,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774302337] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:03:00,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:03:00,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2021-11-20 07:03:00,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911308378] [2021-11-20 07:03:00,802 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:03:00,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-20 07:03:00,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:03:00,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-20 07:03:00,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-11-20 07:03:00,804 INFO L87 Difference]: Start difference. First operand 891 states and 1202 transitions. Second operand has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 07:03:03,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:03:03,494 INFO L93 Difference]: Finished difference Result 1011 states and 1316 transitions. [2021-11-20 07:03:03,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-20 07:03:03,495 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 72 [2021-11-20 07:03:03,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:03:03,503 INFO L225 Difference]: With dead ends: 1011 [2021-11-20 07:03:03,504 INFO L226 Difference]: Without dead ends: 1007 [2021-11-20 07:03:03,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=449, Invalid=1443, Unknown=0, NotChecked=0, Total=1892 [2021-11-20 07:03:03,506 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 323 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 1290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:03:03,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 809 Invalid, 1290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 978 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-20 07:03:03,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2021-11-20 07:03:03,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 893. [2021-11-20 07:03:03,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 598 states have (on average 1.120401337792642) internal successors, (670), 605 states have internal predecessors, (670), 267 states have call successors, (267), 27 states have call predecessors, (267), 27 states have return successors, (267), 260 states have call predecessors, (267), 267 states have call successors, (267) [2021-11-20 07:03:03,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1204 transitions. [2021-11-20 07:03:03,669 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1204 transitions. Word has length 72 [2021-11-20 07:03:03,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:03:03,670 INFO L470 AbstractCegarLoop]: Abstraction has 893 states and 1204 transitions. [2021-11-20 07:03:03,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.5555555555555554) internal successors, (69), 27 states have internal predecessors, (69), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 07:03:03,670 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1204 transitions. [2021-11-20 07:03:03,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-20 07:03:03,673 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:03:03,673 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 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, 1] [2021-11-20 07:03:03,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-20 07:03:03,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-20 07:03:03,888 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:03:03,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:03:03,888 INFO L85 PathProgramCache]: Analyzing trace with hash 821264204, now seen corresponding path program 3 times [2021-11-20 07:03:03,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:03:03,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899209810] [2021-11-20 07:03:03,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:03:03,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:03:03,903 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:03:03,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [883716146] [2021-11-20 07:03:03,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:03:03,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:03:03,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:03:03,906 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:03:03,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-20 07:03:04,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-20 07:03:04,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:03:04,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-20 07:03:04,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:03:04,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 10 treesize of output 8 [2021-11-20 07:03:04,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 07:03:04,536 INFO L354 Elim1Store]: treesize reduction 48, result has 23.8 percent of original size [2021-11-20 07:03:04,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 43 [2021-11-20 07:03:13,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:03:13,308 INFO L354 Elim1Store]: treesize reduction 128, result has 33.7 percent of original size [2021-11-20 07:03:13,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 125 [2021-11-20 07:04:44,121 INFO L354 Elim1Store]: treesize reduction 493, result has 22.5 percent of original size [2021-11-20 07:04:44,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 128 treesize of output 202 [2021-11-20 07:05:00,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:00,874 INFO L354 Elim1Store]: treesize reduction 176, result has 15.8 percent of original size [2021-11-20 07:05:00,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 115 treesize of output 91 [2021-11-20 07:05:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 56 proven. 89 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 07:05:01,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:05:09,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:05:09,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899209810] [2021-11-20 07:05:09,036 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:05:09,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883716146] [2021-11-20 07:05:09,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883716146] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:05:09,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:05:09,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2021-11-20 07:05:09,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337177093] [2021-11-20 07:05:09,037 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:05:09,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-20 07:05:09,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:05:09,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-20 07:05:09,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=401, Invalid=2663, Unknown=16, NotChecked=0, Total=3080 [2021-11-20 07:05:09,039 INFO L87 Difference]: Start difference. First operand 893 states and 1204 transitions. Second operand has 40 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 32 states have internal predecessors, (50), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 07:05:09,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:05:09,880 INFO L93 Difference]: Finished difference Result 929 states and 1239 transitions. [2021-11-20 07:05:09,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-20 07:05:09,881 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 32 states have internal predecessors, (50), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) Word has length 77 [2021-11-20 07:05:09,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:05:09,887 INFO L225 Difference]: With dead ends: 929 [2021-11-20 07:05:09,887 INFO L226 Difference]: Without dead ends: 919 [2021-11-20 07:05:09,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1418 ImplicationChecksByTransitivity, 68.8s TimeCoverageRelationStatistics Valid=429, Invalid=2977, Unknown=16, NotChecked=0, Total=3422 [2021-11-20 07:05:09,888 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 21 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 431 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:05:09,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 731 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 48 Invalid, 0 Unknown, 431 Unchecked, 0.2s Time] [2021-11-20 07:05:09,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2021-11-20 07:05:10,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 917. [2021-11-20 07:05:10,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 616 states have (on average 1.1168831168831168) internal successors, (688), 622 states have internal predecessors, (688), 269 states have call successors, (269), 31 states have call predecessors, (269), 31 states have return successors, (269), 263 states have call predecessors, (269), 269 states have call successors, (269) [2021-11-20 07:05:10,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 1226 transitions. [2021-11-20 07:05:10,028 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 1226 transitions. Word has length 77 [2021-11-20 07:05:10,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:05:10,029 INFO L470 AbstractCegarLoop]: Abstraction has 917 states and 1226 transitions. [2021-11-20 07:05:10,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 32 states have internal predecessors, (50), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2021-11-20 07:05:10,029 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 1226 transitions. [2021-11-20 07:05:10,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-20 07:05:10,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:05:10,032 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:05:10,079 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-20 07:05:10,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-20 07:05:10,248 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:05:10,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:05:10,248 INFO L85 PathProgramCache]: Analyzing trace with hash 186944271, now seen corresponding path program 22 times [2021-11-20 07:05:10,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:05:10,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375894447] [2021-11-20 07:05:10,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:05:10,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:05:10,264 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:05:10,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1346130769] [2021-11-20 07:05:10,264 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:05:10,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:05:10,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:05:10,266 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:05:10,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-20 07:05:10,889 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:05:10,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:05:10,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-20 07:05:10,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:05:10,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 10 treesize of output 8 [2021-11-20 07:05:10,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 07:05:11,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 54 treesize of output 43 [2021-11-20 07:05:11,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2021-11-20 07:05:11,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 91 [2021-11-20 07:05:11,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:11,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 21 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 121 [2021-11-20 07:05:12,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 31 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 139 [2021-11-20 07:05:12,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 43 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 169 [2021-11-20 07:05:12,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:12,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 57 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 199 [2021-11-20 07:05:17,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:17,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:17,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:17,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:18,280 INFO L354 Elim1Store]: treesize reduction 372, result has 38.9 percent of original size [2021-11-20 07:05:18,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 16 select indices, 16 select index equivalence classes, 58 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 16 case distinctions, treesize of input 192 treesize of output 319 [2021-11-20 07:05:38,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:38,699 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:05:38,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:38,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:05:38,732 INFO L354 Elim1Store]: treesize reduction 84, result has 11.6 percent of original size [2021-11-20 07:05:38,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 18 select indices, 18 select index equivalence classes, 28 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 748 treesize of output 346 [2021-11-20 07:05:39,422 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 16 proven. 137 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:05:39,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:05:59,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:05:59,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375894447] [2021-11-20 07:05:59,164 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:05:59,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346130769] [2021-11-20 07:05:59,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346130769] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:05:59,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-20 07:05:59,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2021-11-20 07:05:59,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543248241] [2021-11-20 07:05:59,164 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-20 07:05:59,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-20 07:05:59,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:05:59,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-20 07:05:59,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=625, Invalid=4344, Unknown=1, NotChecked=0, Total=4970 [2021-11-20 07:05:59,166 INFO L87 Difference]: Start difference. First operand 917 states and 1226 transitions. Second operand has 47 states, 45 states have (on average 1.288888888888889) internal successors, (58), 46 states have internal predecessors, (58), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:06:09,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:09,403 INFO L93 Difference]: Finished difference Result 971 states and 1289 transitions. [2021-11-20 07:06:09,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-20 07:06:09,403 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 1.288888888888889) internal successors, (58), 46 states have internal predecessors, (58), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) Word has length 74 [2021-11-20 07:06:09,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:09,408 INFO L225 Difference]: With dead ends: 971 [2021-11-20 07:06:09,408 INFO L226 Difference]: Without dead ends: 967 [2021-11-20 07:06:09,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1439 ImplicationChecksByTransitivity, 30.8s TimeCoverageRelationStatistics Valid=699, Invalid=4850, Unknown=1, NotChecked=0, Total=5550 [2021-11-20 07:06:09,409 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 58 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 2955 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 3183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:09,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 660 Invalid, 3183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2955 Invalid, 0 Unknown, 183 Unchecked, 8.2s Time] [2021-11-20 07:06:09,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2021-11-20 07:06:09,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 938. [2021-11-20 07:06:09,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 632 states have (on average 1.1170886075949367) internal successors, (706), 638 states have internal predecessors, (706), 273 states have call successors, (273), 32 states have call predecessors, (273), 32 states have return successors, (273), 267 states have call predecessors, (273), 273 states have call successors, (273) [2021-11-20 07:06:09,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1252 transitions. [2021-11-20 07:06:09,540 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1252 transitions. Word has length 74 [2021-11-20 07:06:09,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:09,541 INFO L470 AbstractCegarLoop]: Abstraction has 938 states and 1252 transitions. [2021-11-20 07:06:09,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 1.288888888888889) internal successors, (58), 46 states have internal predecessors, (58), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-20 07:06:09,541 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1252 transitions. [2021-11-20 07:06:09,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 07:06:09,543 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:09,543 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:06:09,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-20 07:06:09,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-20 07:06:09,762 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:09,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:09,763 INFO L85 PathProgramCache]: Analyzing trace with hash -681948143, now seen corresponding path program 23 times [2021-11-20 07:06:09,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:09,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139454602] [2021-11-20 07:06:09,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:09,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:09,773 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:06:09,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802829281] [2021-11-20 07:06:09,774 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:06:09,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:09,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:06:09,775 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:06:09,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-20 07:06:10,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-11-20 07:06:10,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:06:10,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 07:06:10,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:06:10,690 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 97 proven. 64 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:06:10,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:06:11,652 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 81 proven. 64 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 07:06:11,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:11,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139454602] [2021-11-20 07:06:11,652 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:06:11,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802829281] [2021-11-20 07:06:11,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802829281] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:06:11,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:06:11,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2021-11-20 07:06:11,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361451075] [2021-11-20 07:06:11,653 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:06:11,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-20 07:06:11,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:06:11,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-20 07:06:11,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2021-11-20 07:06:11,654 INFO L87 Difference]: Start difference. First operand 938 states and 1252 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 30 states have internal predecessors, (75), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 07:06:19,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:19,237 INFO L93 Difference]: Finished difference Result 2584 states and 3413 transitions. [2021-11-20 07:06:19,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-20 07:06:19,238 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 30 states have internal predecessors, (75), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 76 [2021-11-20 07:06:19,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:19,250 INFO L225 Difference]: With dead ends: 2584 [2021-11-20 07:06:19,250 INFO L226 Difference]: Without dead ends: 1851 [2021-11-20 07:06:19,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1606 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1257, Invalid=4749, Unknown=0, NotChecked=0, Total=6006 [2021-11-20 07:06:19,255 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 1550 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 1638 mSolverCounterSat, 1420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1586 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 3058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1420 IncrementalHoareTripleChecker+Valid, 1638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:19,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1586 Valid, 800 Invalid, 3058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1420 Valid, 1638 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2021-11-20 07:06:19,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1851 states. [2021-11-20 07:06:19,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1851 to 1125. [2021-11-20 07:06:19,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 751 states have (on average 1.1198402130492677) internal successors, (841), 758 states have internal predecessors, (841), 339 states have call successors, (339), 34 states have call predecessors, (339), 34 states have return successors, (339), 332 states have call predecessors, (339), 339 states have call successors, (339) [2021-11-20 07:06:19,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 1519 transitions. [2021-11-20 07:06:19,413 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 1519 transitions. Word has length 76 [2021-11-20 07:06:19,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:19,413 INFO L470 AbstractCegarLoop]: Abstraction has 1125 states and 1519 transitions. [2021-11-20 07:06:19,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 30 states have internal predecessors, (75), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 07:06:19,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 1519 transitions. [2021-11-20 07:06:19,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-20 07:06:19,415 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:19,416 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:06:19,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-20 07:06:19,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:19,644 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:19,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:19,644 INFO L85 PathProgramCache]: Analyzing trace with hash 846741905, now seen corresponding path program 24 times [2021-11-20 07:06:19,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:19,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903468524] [2021-11-20 07:06:19,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:19,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:19,655 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:06:19,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1283199989] [2021-11-20 07:06:19,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:06:19,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:19,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:06:19,657 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:06:19,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-20 07:06:19,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-11-20 07:06:19,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:06:19,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 07:06:19,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:06:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 80 proven. 81 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 07:06:20,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:06:21,145 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 07:06:21,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:06:21,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903468524] [2021-11-20 07:06:21,145 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 07:06:21,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283199989] [2021-11-20 07:06:21,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283199989] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:06:21,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:06:21,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2021-11-20 07:06:21,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511079593] [2021-11-20 07:06:21,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:06:21,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-20 07:06:21,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:06:21,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-20 07:06:21,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2021-11-20 07:06:21,147 INFO L87 Difference]: Start difference. First operand 1125 states and 1519 transitions. Second operand has 30 states, 30 states have (on average 2.5) internal successors, (75), 30 states have internal predecessors, (75), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 07:06:24,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:06:24,846 INFO L93 Difference]: Finished difference Result 1278 states and 1665 transitions. [2021-11-20 07:06:24,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-20 07:06:24,847 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 30 states have internal predecessors, (75), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 76 [2021-11-20 07:06:24,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:06:24,853 INFO L225 Difference]: With dead ends: 1278 [2021-11-20 07:06:24,853 INFO L226 Difference]: Without dead ends: 1274 [2021-11-20 07:06:24,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=549, Invalid=1803, Unknown=0, NotChecked=0, Total=2352 [2021-11-20 07:06:24,854 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 311 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 1573 mSolverCounterSat, 321 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 1894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 321 IncrementalHoareTripleChecker+Valid, 1573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 07:06:24,854 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 1168 Invalid, 1894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [321 Valid, 1573 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-11-20 07:06:24,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-11-20 07:06:24,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1127. [2021-11-20 07:06:24,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 753 states have (on average 1.1195219123505975) internal successors, (843), 760 states have internal predecessors, (843), 339 states have call successors, (339), 34 states have call predecessors, (339), 34 states have return successors, (339), 332 states have call predecessors, (339), 339 states have call successors, (339) [2021-11-20 07:06:24,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 1521 transitions. [2021-11-20 07:06:24,968 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 1521 transitions. Word has length 76 [2021-11-20 07:06:24,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:06:24,969 INFO L470 AbstractCegarLoop]: Abstraction has 1127 states and 1521 transitions. [2021-11-20 07:06:24,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.5) internal successors, (75), 30 states have internal predecessors, (75), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 07:06:24,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 1521 transitions. [2021-11-20 07:06:24,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-20 07:06:24,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:06:24,971 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 3, 3, 3, 3, 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, 1] [2021-11-20 07:06:25,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-11-20 07:06:25,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:25,196 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:06:25,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:06:25,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1449054260, now seen corresponding path program 4 times [2021-11-20 07:06:25,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:06:25,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391073178] [2021-11-20 07:06:25,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:06:25,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:06:25,204 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 07:06:25,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2043437222] [2021-11-20 07:06:25,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:06:25,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:06:25,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:06:25,206 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:06:25,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abc6ed80-0ab5-4f84-aebd-0a8ed0d3a42a/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-20 07:06:25,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:06:25,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:06:25,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-20 07:06:25,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:06:25,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 10 treesize of output 8 [2021-11-20 07:06:25,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2021-11-20 07:06:25,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:25,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:25,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing 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 0 case distinctions, treesize of input 64 treesize of output 53 [2021-11-20 07:06:25,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:25,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:25,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:25,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:25,921 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:25,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:25,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 83 [2021-11-20 07:06:37,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:06:37,741 INFO L354 Elim1Store]: treesize reduction 294, result has 30.2 percent of original size [2021-11-20 07:06:37,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 143 treesize of output 196