./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array21_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array21_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f1a738dced8b73ebc8edf3e480fddcd32bb19127a8255980e93fab5e96705ab3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 04:28:30,782 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 04:28:30,791 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 04:28:30,869 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 04:28:30,870 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 04:28:30,878 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 04:28:30,882 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 04:28:30,886 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 04:28:30,889 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 04:28:30,891 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 04:28:30,894 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 04:28:30,896 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 04:28:30,897 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 04:28:30,899 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 04:28:30,902 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 04:28:30,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 04:28:30,907 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 04:28:30,909 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 04:28:30,912 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 04:28:30,915 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 04:28:30,918 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 04:28:30,923 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 04:28:30,928 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 04:28:30,930 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 04:28:30,947 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 04:28:30,948 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 04:28:30,949 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 04:28:30,952 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 04:28:30,953 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 04:28:30,956 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 04:28:30,957 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 04:28:30,959 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 04:28:30,962 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 04:28:30,964 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 04:28:30,967 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 04:28:30,968 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 04:28:30,969 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 04:28:30,969 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 04:28:30,971 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 04:28:30,973 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 04:28:30,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 04:28:30,978 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-19 04:28:31,048 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 04:28:31,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 04:28:31,050 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 04:28:31,050 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 04:28:31,051 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 04:28:31,052 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 04:28:31,053 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 04:28:31,054 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 04:28:31,054 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 04:28:31,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 04:28:31,055 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 04:28:31,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 04:28:31,056 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 04:28:31,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 04:28:31,056 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 04:28:31,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 04:28:31,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 04:28:31,058 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 04:28:31,058 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 04:28:31,058 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 04:28:31,059 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 04:28:31,059 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 04:28:31,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 04:28:31,060 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 04:28:31,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:28:31,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 04:28:31,061 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 04:28:31,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 04:28:31,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 04:28:31,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 04:28:31,063 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-19 04:28:31,063 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-19 04:28:31,064 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 04:28:31,064 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 04:28:31,064 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_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1a738dced8b73ebc8edf3e480fddcd32bb19127a8255980e93fab5e96705ab3 [2021-11-19 04:28:31,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 04:28:31,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 04:28:31,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 04:28:31,766 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 04:28:31,767 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 04:28:31,771 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/array-patterns/array21_pattern.c [2021-11-19 04:28:31,903 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/data/84f0196dc/888ae955d660425695c0882000c074b0/FLAG78c5590eb [2021-11-19 04:28:33,012 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 04:28:33,013 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/sv-benchmarks/c/array-patterns/array21_pattern.c [2021-11-19 04:28:33,032 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/data/84f0196dc/888ae955d660425695c0882000c074b0/FLAG78c5590eb [2021-11-19 04:28:33,056 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/data/84f0196dc/888ae955d660425695c0882000c074b0 [2021-11-19 04:28:33,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 04:28:33,072 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 04:28:33,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 04:28:33,080 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 04:28:33,087 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 04:28:33,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:28:33" (1/1) ... [2021-11-19 04:28:33,091 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a232653 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:28:33, skipping insertion in model container [2021-11-19 04:28:33,092 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:28:33" (1/1) ... [2021-11-19 04:28:33,107 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 04:28:33,143 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 04:28:33,534 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_e553276b-997f-4ba6-b209-dfef839be40e/sv-benchmarks/c/array-patterns/array21_pattern.c[1340,1353] [2021-11-19 04:28:33,581 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:28:33,622 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 04:28:33,655 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_e553276b-997f-4ba6-b209-dfef839be40e/sv-benchmarks/c/array-patterns/array21_pattern.c[1340,1353] [2021-11-19 04:28:33,675 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 04:28:33,699 INFO L208 MainTranslator]: Completed translation [2021-11-19 04:28:33,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:28:33 WrapperNode [2021-11-19 04:28:33,700 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 04:28:33,702 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 04:28:33,703 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 04:28:33,703 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 04:28:33,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:28:33" (1/1) ... [2021-11-19 04:28:33,754 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:28:33" (1/1) ... [2021-11-19 04:28:33,818 INFO L137 Inliner]: procedures = 17, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 105 [2021-11-19 04:28:33,822 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 04:28:33,823 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 04:28:33,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 04:28:33,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 04:28:33,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:28:33" (1/1) ... [2021-11-19 04:28:33,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:28:33" (1/1) ... [2021-11-19 04:28:33,861 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:28:33" (1/1) ... [2021-11-19 04:28:33,862 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:28:33" (1/1) ... [2021-11-19 04:28:33,872 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:28:33" (1/1) ... [2021-11-19 04:28:33,903 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:28:33" (1/1) ... [2021-11-19 04:28:33,906 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:28:33" (1/1) ... [2021-11-19 04:28:33,914 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 04:28:33,930 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 04:28:33,930 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 04:28:33,930 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 04:28:33,932 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:28:33" (1/1) ... [2021-11-19 04:28:33,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 04:28:33,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:28:33,985 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 04:28:33,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 04:28:34,072 INFO L130 BoogieDeclarations]: Found specification of procedure outerBoundaryPatternCheck [2021-11-19 04:28:34,072 INFO L138 BoogieDeclarations]: Found implementation of procedure outerBoundaryPatternCheck [2021-11-19 04:28:34,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 04:28:34,073 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-19 04:28:34,074 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-19 04:28:34,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 04:28:34,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 04:28:34,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 04:28:34,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 04:28:34,075 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 04:28:34,076 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 04:28:34,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 04:28:34,209 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 04:28:34,215 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 04:28:34,690 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 04:28:34,702 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 04:28:34,702 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-19 04:28:34,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:28:34 BoogieIcfgContainer [2021-11-19 04:28:34,706 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 04:28:34,710 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 04:28:34,710 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 04:28:34,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 04:28:34,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:28:33" (1/3) ... [2021-11-19 04:28:34,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4962d0cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:28:34, skipping insertion in model container [2021-11-19 04:28:34,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:28:33" (2/3) ... [2021-11-19 04:28:34,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4962d0cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:28:34, skipping insertion in model container [2021-11-19 04:28:34,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:28:34" (3/3) ... [2021-11-19 04:28:34,735 INFO L111 eAbstractionObserver]: Analyzing ICFG array21_pattern.c [2021-11-19 04:28:34,754 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 04:28:34,754 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-19 04:28:34,904 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 04:28:34,923 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 [2021-11-19 04:28:34,924 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-19 04:28:34,972 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 32 states have internal predecessors, (48), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-19 04:28:34,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-19 04:28:34,983 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:28:34,984 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:28:34,985 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:28:34,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:28:34,998 INFO L85 PathProgramCache]: Analyzing trace with hash 2136211159, now seen corresponding path program 1 times [2021-11-19 04:28:35,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:28:35,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001544204] [2021-11-19 04:28:35,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:28:35,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:28:35,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:28:35,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-19 04:28:35,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:28:35,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 04:28:35,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:28:35,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001544204] [2021-11-19 04:28:35,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001544204] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:28:35,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:28:35,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 04:28:35,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421600122] [2021-11-19 04:28:35,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:28:35,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-19 04:28:35,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:28:35,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-19 04:28:35,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-19 04:28:35,508 INFO L87 Difference]: Start difference. First operand has 40 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 32 states have internal predecessors, (48), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:28:35,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:28:35,564 INFO L93 Difference]: Finished difference Result 77 states and 115 transitions. [2021-11-19 04:28:35,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-19 04:28:35,570 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-19 04:28:35,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:28:35,586 INFO L225 Difference]: With dead ends: 77 [2021-11-19 04:28:35,586 INFO L226 Difference]: Without dead ends: 36 [2021-11-19 04:28:35,593 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 [2021-11-19 04:28:35,610 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:28:35,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:28:35,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-19 04:28:35,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-19 04:28:35,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-19 04:28:35,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2021-11-19 04:28:35,704 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 15 [2021-11-19 04:28:35,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:28:35,705 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2021-11-19 04:28:35,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 04:28:35,708 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2021-11-19 04:28:35,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 04:28:35,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:28:35,717 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:28:35,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 04:28:35,720 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:28:35,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:28:35,728 INFO L85 PathProgramCache]: Analyzing trace with hash -699940082, now seen corresponding path program 1 times [2021-11-19 04:28:35,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:28:35,728 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542657759] [2021-11-19 04:28:35,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:28:35,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:28:35,761 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:28:35,764 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1767825996] [2021-11-19 04:28:35,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:28:35,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:28:35,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:28:35,769 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:28:35,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 04:28:35,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:28:35,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-19 04:28:35,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:28:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-19 04:28:36,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:28:36,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:28:36,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542657759] [2021-11-19 04:28:36,319 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:28:36,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767825996] [2021-11-19 04:28:36,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767825996] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:28:36,321 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:28:36,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 04:28:36,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504933223] [2021-11-19 04:28:36,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:28:36,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 04:28:36,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:28:36,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 04:28:36,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:28:36,329 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 04:28:36,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:28:36,692 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2021-11-19 04:28:36,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 04:28:36,694 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2021-11-19 04:28:36,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:28:36,697 INFO L225 Difference]: With dead ends: 76 [2021-11-19 04:28:36,697 INFO L226 Difference]: Without dead ends: 48 [2021-11-19 04:28:36,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-11-19 04:28:36,702 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 49 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 04:28:36,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 92 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 04:28:36,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-19 04:28:36,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2021-11-19 04:28:36,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-19 04:28:36,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 51 transitions. [2021-11-19 04:28:36,724 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 51 transitions. Word has length 35 [2021-11-19 04:28:36,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:28:36,726 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 51 transitions. [2021-11-19 04:28:36,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 04:28:36,727 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 51 transitions. [2021-11-19 04:28:36,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-19 04:28:36,733 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:28:36,734 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:28:36,810 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 04:28:36,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:28:36,962 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:28:36,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:28:36,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1308831759, now seen corresponding path program 1 times [2021-11-19 04:28:36,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:28:36,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537224538] [2021-11-19 04:28:36,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:28:36,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:28:37,021 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:28:37,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [794111490] [2021-11-19 04:28:37,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:28:37,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:28:37,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:28:37,026 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:28:37,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 04:28:37,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:28:37,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 04:28:37,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:28:37,553 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-19 04:28:37,568 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:28:37,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:28:37,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537224538] [2021-11-19 04:28:37,569 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:28:37,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794111490] [2021-11-19 04:28:37,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794111490] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:28:37,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:28:37,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 04:28:37,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700989248] [2021-11-19 04:28:37,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:28:37,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 04:28:37,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:28:37,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 04:28:37,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 04:28:37,576 INFO L87 Difference]: Start difference. First operand 42 states and 51 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 04:28:37,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:28:37,730 INFO L93 Difference]: Finished difference Result 79 states and 99 transitions. [2021-11-19 04:28:37,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 04:28:37,746 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2021-11-19 04:28:37,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:28:37,748 INFO L225 Difference]: With dead ends: 79 [2021-11-19 04:28:37,748 INFO L226 Difference]: Without dead ends: 46 [2021-11-19 04:28:37,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:28:37,752 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 27 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 04:28:37,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 76 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 04:28:37,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-19 04:28:37,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2021-11-19 04:28:37,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-19 04:28:37,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2021-11-19 04:28:37,771 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 41 [2021-11-19 04:28:37,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:28:37,772 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2021-11-19 04:28:37,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-19 04:28:37,773 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2021-11-19 04:28:37,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-19 04:28:37,782 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:28:37,782 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:28:37,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 04:28:37,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:28:37,984 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:28:37,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:28:37,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1300942485, now seen corresponding path program 1 times [2021-11-19 04:28:37,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:28:37,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539707703] [2021-11-19 04:28:37,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:28:37,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:28:38,036 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:28:38,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [674670197] [2021-11-19 04:28:38,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:28:38,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:28:38,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:28:38,047 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:28:38,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 04:28:38,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:28:38,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 04:28:38,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:28:38,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 04:28:38,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:28:39,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 04:28:39,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:28:39,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539707703] [2021-11-19 04:28:39,142 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:28:39,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674670197] [2021-11-19 04:28:39,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674670197] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:28:39,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:28:39,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-11-19 04:28:39,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277598391] [2021-11-19 04:28:39,145 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:28:39,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 04:28:39,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:28:39,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 04:28:39,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-19 04:28:39,150 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 04:28:39,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:28:39,756 INFO L93 Difference]: Finished difference Result 85 states and 105 transitions. [2021-11-19 04:28:39,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:28:39,758 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 45 [2021-11-19 04:28:39,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:28:39,761 INFO L225 Difference]: With dead ends: 85 [2021-11-19 04:28:39,762 INFO L226 Difference]: Without dead ends: 50 [2021-11-19 04:28:39,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-19 04:28:39,766 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 104 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:28:39,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 151 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:28:39,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-19 04:28:39,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2021-11-19 04:28:39,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-19 04:28:39,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2021-11-19 04:28:39,785 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 45 [2021-11-19 04:28:39,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:28:39,786 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2021-11-19 04:28:39,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-19 04:28:39,787 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2021-11-19 04:28:39,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-19 04:28:39,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:28:39,791 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:28:39,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 04:28:40,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-11-19 04:28:40,006 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:28:40,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:28:40,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1544610617, now seen corresponding path program 2 times [2021-11-19 04:28:40,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:28:40,007 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120498788] [2021-11-19 04:28:40,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:28:40,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:28:40,027 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:28:40,028 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [95936809] [2021-11-19 04:28:40,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 04:28:40,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:28:40,029 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:28:40,031 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:28:40,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 04:28:40,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 04:28:40,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:28:40,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 04:28:40,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:28:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-19 04:28:40,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:28:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 04:28:40,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:28:40,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120498788] [2021-11-19 04:28:40,744 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:28:40,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95936809] [2021-11-19 04:28:40,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95936809] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:28:40,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:28:40,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-11-19 04:28:40,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557944914] [2021-11-19 04:28:40,747 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:28:40,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 04:28:40,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:28:40,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 04:28:40,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-19 04:28:40,751 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 04:28:41,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:28:41,190 INFO L93 Difference]: Finished difference Result 106 states and 128 transitions. [2021-11-19 04:28:41,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 04:28:41,192 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 49 [2021-11-19 04:28:41,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:28:41,194 INFO L225 Difference]: With dead ends: 106 [2021-11-19 04:28:41,195 INFO L226 Difference]: Without dead ends: 74 [2021-11-19 04:28:41,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-11-19 04:28:41,198 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 50 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:28:41,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 198 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:28:41,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-19 04:28:41,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2021-11-19 04:28:41,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 states have internal predecessors, (63), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-11-19 04:28:41,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2021-11-19 04:28:41,247 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 49 [2021-11-19 04:28:41,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:28:41,249 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2021-11-19 04:28:41,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 04:28:41,250 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2021-11-19 04:28:41,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-19 04:28:41,257 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:28:41,259 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:28:41,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 04:28:41,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:28:41,469 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:28:41,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:28:41,470 INFO L85 PathProgramCache]: Analyzing trace with hash -725408594, now seen corresponding path program 3 times [2021-11-19 04:28:41,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:28:41,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991238874] [2021-11-19 04:28:41,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:28:41,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:28:41,513 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:28:41,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1935761356] [2021-11-19 04:28:41,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 04:28:41,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:28:41,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:28:41,519 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:28:41,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 04:28:42,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-19 04:28:42,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:28:42,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-19 04:28:42,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:28:42,518 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 04:28:42,545 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 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-19 04:28:42,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:28:42,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:28:42,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 87 [2021-11-19 04:28:42,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:28:42,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 22 [2021-11-19 04:28:43,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:28:43,532 INFO L354 Elim1Store]: treesize reduction 172, result has 16.1 percent of original size [2021-11-19 04:28:43,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 76 treesize of output 96 [2021-11-19 04:28:43,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:28:43,625 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-19 04:28:43,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 37 treesize of output 10 [2021-11-19 04:28:44,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:28:44,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:28:44,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:28:44,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:28:44,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:28:44,141 INFO L354 Elim1Store]: treesize reduction 124, result has 12.1 percent of original size [2021-11-19 04:28:44,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 95 treesize of output 137 [2021-11-19 04:28:44,195 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 04:28:44,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:28:44,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:28:44,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:28:44,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:28:44,298 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-11-19 04:28:44,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 102 treesize of output 39 [2021-11-19 04:28:50,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:28:51,090 INFO L354 Elim1Store]: treesize reduction 440, result has 31.9 percent of original size [2021-11-19 04:28:51,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 126 treesize of output 292 [2021-11-19 04:29:07,776 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 04:29:08,723 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 04:29:10,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:29:10,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:29:10,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:29:10,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:29:10,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:29:10,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:29:10,201 INFO L354 Elim1Store]: treesize reduction 63, result has 40.6 percent of original size [2021-11-19 04:29:10,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 554 treesize of output 393 [2021-11-19 04:32:03,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:32:03,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:32:03,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:32:03,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:32:03,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:32:07,311 INFO L354 Elim1Store]: treesize reduction 1154, result has 24.0 percent of original size [2021-11-19 04:32:07,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 6 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 382 treesize of output 510 [2021-11-19 04:32:44,170 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 04:32:44,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:33:44,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:33:44,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991238874] [2021-11-19 04:33:44,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:33:44,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935761356] [2021-11-19 04:33:44,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935761356] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 04:33:44,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-11-19 04:33:44,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2021-11-19 04:33:44,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762789841] [2021-11-19 04:33:44,886 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-11-19 04:33:44,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-19 04:33:44,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:33:44,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-19 04:33:44,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=2443, Unknown=10, NotChecked=0, Total=2862 [2021-11-19 04:33:44,891 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:33:47,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:33:47,774 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2021-11-19 04:33:47,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-19 04:33:47,775 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 63 [2021-11-19 04:33:47,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:33:47,779 INFO L225 Difference]: With dead ends: 110 [2021-11-19 04:33:47,779 INFO L226 Difference]: Without dead ends: 106 [2021-11-19 04:33:47,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1448 ImplicationChecksByTransitivity, 57.6s TimeCoverageRelationStatistics Valid=453, Invalid=2959, Unknown=10, NotChecked=0, Total=3422 [2021-11-19 04:33:47,783 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 31 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 303 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:33:47,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 423 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 193 Invalid, 0 Unknown, 303 Unchecked, 0.3s Time] [2021-11-19 04:33:47,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-19 04:33:47,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2021-11-19 04:33:47,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 86 states have (on average 1.2093023255813953) internal successors, (104), 86 states have internal predecessors, (104), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-19 04:33:47,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 121 transitions. [2021-11-19 04:33:47,822 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 121 transitions. Word has length 63 [2021-11-19 04:33:47,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:33:47,823 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 121 transitions. [2021-11-19 04:33:47,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 37 states have internal predecessors, (55), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-19 04:33:47,824 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 121 transitions. [2021-11-19 04:33:47,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-19 04:33:47,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:33:47,826 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:33:47,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 04:33:48,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:33:48,041 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:33:48,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:33:48,042 INFO L85 PathProgramCache]: Analyzing trace with hash -506553876, now seen corresponding path program 1 times [2021-11-19 04:33:48,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:33:48,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280518213] [2021-11-19 04:33:48,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:33:48,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:33:48,073 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:33:48,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1065668752] [2021-11-19 04:33:48,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:33:48,073 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:33:48,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:33:48,085 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:33:48,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 04:33:48,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:33:48,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 04:33:48,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:33:48,333 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 04:33:48,333 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:33:48,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:33:48,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280518213] [2021-11-19 04:33:48,334 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:33:48,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065668752] [2021-11-19 04:33:48,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065668752] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:33:48,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:33:48,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 04:33:48,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641666546] [2021-11-19 04:33:48,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:33:48,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 04:33:48,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:33:48,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 04:33:48,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:33:48,338 INFO L87 Difference]: Start difference. First operand 100 states and 121 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:33:48,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:33:48,366 INFO L93 Difference]: Finished difference Result 141 states and 171 transitions. [2021-11-19 04:33:48,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 04:33:48,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 63 [2021-11-19 04:33:48,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:33:48,370 INFO L225 Difference]: With dead ends: 141 [2021-11-19 04:33:48,370 INFO L226 Difference]: Without dead ends: 102 [2021-11-19 04:33:48,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 04:33:48,378 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 1 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:33:48,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 83 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:33:48,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-19 04:33:48,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-11-19 04:33:48,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 87 states have (on average 1.1954022988505748) internal successors, (104), 87 states have internal predecessors, (104), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-11-19 04:33:48,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 121 transitions. [2021-11-19 04:33:48,422 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 121 transitions. Word has length 63 [2021-11-19 04:33:48,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:33:48,423 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 121 transitions. [2021-11-19 04:33:48,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:33:48,423 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 121 transitions. [2021-11-19 04:33:48,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-19 04:33:48,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:33:48,425 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:33:48,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 04:33:48,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-19 04:33:48,653 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:33:48,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:33:48,653 INFO L85 PathProgramCache]: Analyzing trace with hash 236205423, now seen corresponding path program 1 times [2021-11-19 04:33:48,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:33:48,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503777568] [2021-11-19 04:33:48,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:33:48,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:33:48,663 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:33:48,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577488292] [2021-11-19 04:33:48,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:33:48,664 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:33:48,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:33:48,666 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:33:48,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 04:33:48,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:33:48,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-19 04:33:48,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:33:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 04:33:48,919 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:33:48,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:33:48,919 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503777568] [2021-11-19 04:33:48,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:33:48,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577488292] [2021-11-19 04:33:48,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577488292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:33:48,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:33:48,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:33:48,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243072596] [2021-11-19 04:33:48,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:33:48,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:33:48,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:33:48,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:33:48,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:33:48,922 INFO L87 Difference]: Start difference. First operand 101 states and 121 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:33:48,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:33:48,984 INFO L93 Difference]: Finished difference Result 151 states and 184 transitions. [2021-11-19 04:33:48,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:33:48,985 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 63 [2021-11-19 04:33:48,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:33:48,990 INFO L225 Difference]: With dead ends: 151 [2021-11-19 04:33:48,990 INFO L226 Difference]: Without dead ends: 111 [2021-11-19 04:33:48,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:33:48,992 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 5 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:33:48,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 193 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:33:48,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-19 04:33:49,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 105. [2021-11-19 04:33:49,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 90 states have (on average 1.1888888888888889) internal successors, (107), 90 states have internal predecessors, (107), 8 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11) [2021-11-19 04:33:49,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 126 transitions. [2021-11-19 04:33:49,038 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 126 transitions. Word has length 63 [2021-11-19 04:33:49,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:33:49,038 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 126 transitions. [2021-11-19 04:33:49,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:33:49,039 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 126 transitions. [2021-11-19 04:33:49,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-19 04:33:49,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:33:49,042 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:33:49,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-19 04:33:49,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-19 04:33:49,265 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:33:49,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:33:49,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1172698608, now seen corresponding path program 4 times [2021-11-19 04:33:49,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:33:49,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802579431] [2021-11-19 04:33:49,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:33:49,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:33:49,290 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:33:49,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699049577] [2021-11-19 04:33:49,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 04:33:49,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:33:49,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:33:49,294 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:33:49,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 04:33:49,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 04:33:49,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:33:49,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 04:33:49,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:33:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 04:33:49,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:33:49,863 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 19 proven. 30 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-19 04:33:49,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:33:49,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802579431] [2021-11-19 04:33:49,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:33:49,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699049577] [2021-11-19 04:33:49,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699049577] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:33:49,864 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:33:49,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-19 04:33:49,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442169693] [2021-11-19 04:33:49,864 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:33:49,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 04:33:49,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:33:49,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 04:33:49,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:33:49,866 INFO L87 Difference]: Start difference. First operand 105 states and 126 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 04:33:50,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:33:50,255 INFO L93 Difference]: Finished difference Result 331 states and 413 transitions. [2021-11-19 04:33:50,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-19 04:33:50,256 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2021-11-19 04:33:50,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:33:50,259 INFO L225 Difference]: With dead ends: 331 [2021-11-19 04:33:50,259 INFO L226 Difference]: Without dead ends: 245 [2021-11-19 04:33:50,260 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-11-19 04:33:50,261 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 160 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:33:50,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 172 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:33:50,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-11-19 04:33:50,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 189. [2021-11-19 04:33:50,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 162 states have (on average 1.191358024691358) internal successors, (193), 162 states have internal predecessors, (193), 15 states have call successors, (15), 9 states have call predecessors, (15), 11 states have return successors, (21), 17 states have call predecessors, (21), 15 states have call successors, (21) [2021-11-19 04:33:50,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 229 transitions. [2021-11-19 04:33:50,296 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 229 transitions. Word has length 65 [2021-11-19 04:33:50,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:33:50,297 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 229 transitions. [2021-11-19 04:33:50,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 04:33:50,298 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 229 transitions. [2021-11-19 04:33:50,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-19 04:33:50,300 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:33:50,300 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:33:50,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 04:33:50,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:33:50,521 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:33:50,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:33:50,522 INFO L85 PathProgramCache]: Analyzing trace with hash -834557719, now seen corresponding path program 1 times [2021-11-19 04:33:50,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:33:50,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346537108] [2021-11-19 04:33:50,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:33:50,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:33:50,536 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:33:50,536 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [410773335] [2021-11-19 04:33:50,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:33:50,536 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:33:50,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:33:50,541 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:33:50,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 04:33:50,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:33:50,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-19 04:33:50,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:33:50,787 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-19 04:33:50,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-19 04:33:50,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:33:50,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346537108] [2021-11-19 04:33:50,788 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:33:50,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410773335] [2021-11-19 04:33:50,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410773335] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 04:33:50,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 04:33:50,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 04:33:50,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141154936] [2021-11-19 04:33:50,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 04:33:50,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 04:33:50,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:33:50,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 04:33:50,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 04:33:50,790 INFO L87 Difference]: Start difference. First operand 189 states and 229 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 04:33:50,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:33:50,852 INFO L93 Difference]: Finished difference Result 281 states and 340 transitions. [2021-11-19 04:33:50,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 04:33:50,854 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2021-11-19 04:33:50,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:33:50,859 INFO L225 Difference]: With dead ends: 281 [2021-11-19 04:33:50,860 INFO L226 Difference]: Without dead ends: 193 [2021-11-19 04:33:50,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-19 04:33:50,861 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 5 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 04:33:50,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 164 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 04:33:50,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-11-19 04:33:50,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2021-11-19 04:33:50,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 162 states have (on average 1.1666666666666667) internal successors, (189), 162 states have internal predecessors, (189), 15 states have call successors, (15), 9 states have call predecessors, (15), 11 states have return successors, (21), 17 states have call predecessors, (21), 15 states have call successors, (21) [2021-11-19 04:33:50,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 225 transitions. [2021-11-19 04:33:50,904 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 225 transitions. Word has length 69 [2021-11-19 04:33:50,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:33:50,904 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 225 transitions. [2021-11-19 04:33:50,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 4 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 04:33:50,905 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 225 transitions. [2021-11-19 04:33:50,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-19 04:33:50,907 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:33:50,907 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:33:50,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-19 04:33:51,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:33:51,133 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:33:51,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:33:51,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1276732650, now seen corresponding path program 1 times [2021-11-19 04:33:51,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:33:51,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435046247] [2021-11-19 04:33:51,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:33:51,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:33:51,150 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:33:51,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [413689756] [2021-11-19 04:33:51,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:33:51,154 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:33:51,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:33:51,155 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:33:51,162 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 04:33:51,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:33:51,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-19 04:33:51,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:33:51,625 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-19 04:33:51,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:33:52,112 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 04:33:52,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:33:52,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435046247] [2021-11-19 04:33:52,113 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:33:52,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413689756] [2021-11-19 04:33:52,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413689756] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:33:52,114 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:33:52,114 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-11-19 04:33:52,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867408579] [2021-11-19 04:33:52,114 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:33:52,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-19 04:33:52,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:33:52,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-19 04:33:52,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-11-19 04:33:52,117 INFO L87 Difference]: Start difference. First operand 189 states and 225 transitions. Second operand has 17 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 5 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-19 04:33:52,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:33:52,770 INFO L93 Difference]: Finished difference Result 267 states and 304 transitions. [2021-11-19 04:33:52,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-19 04:33:52,771 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 5 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 69 [2021-11-19 04:33:52,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:33:52,773 INFO L225 Difference]: With dead ends: 267 [2021-11-19 04:33:52,773 INFO L226 Difference]: Without dead ends: 221 [2021-11-19 04:33:52,774 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-11-19 04:33:52,775 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 90 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 04:33:52,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 267 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 04:33:52,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-19 04:33:52,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 192. [2021-11-19 04:33:52,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 164 states have (on average 1.146341463414634) internal successors, (188), 165 states have internal predecessors, (188), 15 states have call successors, (15), 11 states have call predecessors, (15), 12 states have return successors, (18), 15 states have call predecessors, (18), 15 states have call successors, (18) [2021-11-19 04:33:52,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 221 transitions. [2021-11-19 04:33:52,802 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 221 transitions. Word has length 69 [2021-11-19 04:33:52,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:33:52,803 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 221 transitions. [2021-11-19 04:33:52,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 5 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2021-11-19 04:33:52,804 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 221 transitions. [2021-11-19 04:33:52,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-19 04:33:52,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:33:52,806 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:33:52,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 04:33:53,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:33:53,021 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:33:53,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:33:53,021 INFO L85 PathProgramCache]: Analyzing trace with hash 385728908, now seen corresponding path program 5 times [2021-11-19 04:33:53,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:33:53,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303957529] [2021-11-19 04:33:53,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:33:53,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:33:53,034 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:33:53,035 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2006554627] [2021-11-19 04:33:53,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 04:33:53,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:33:53,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:33:53,043 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:33:53,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 04:33:53,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-19 04:33:53,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:33:53,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 04:33:53,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:33:53,494 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 12 proven. 34 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-19 04:33:53,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:33:53,776 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-19 04:33:53,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:33:53,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303957529] [2021-11-19 04:33:53,777 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:33:53,778 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006554627] [2021-11-19 04:33:53,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006554627] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:33:53,778 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:33:53,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-11-19 04:33:53,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951512202] [2021-11-19 04:33:53,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:33:53,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-19 04:33:53,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:33:53,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-19 04:33:53,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-11-19 04:33:53,781 INFO L87 Difference]: Start difference. First operand 192 states and 221 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 15 states have internal predecessors, (61), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 04:33:54,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:33:54,261 INFO L93 Difference]: Finished difference Result 351 states and 403 transitions. [2021-11-19 04:33:54,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-19 04:33:54,262 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 15 states have internal predecessors, (61), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2021-11-19 04:33:54,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:33:54,264 INFO L225 Difference]: With dead ends: 351 [2021-11-19 04:33:54,264 INFO L226 Difference]: Without dead ends: 217 [2021-11-19 04:33:54,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2021-11-19 04:33:54,266 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 60 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:33:54,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 165 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:33:54,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-19 04:33:54,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 179. [2021-11-19 04:33:54,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 156 states have (on average 1.141025641025641) internal successors, (178), 157 states have internal predecessors, (178), 12 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-19 04:33:54,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 204 transitions. [2021-11-19 04:33:54,291 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 204 transitions. Word has length 69 [2021-11-19 04:33:54,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:33:54,291 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 204 transitions. [2021-11-19 04:33:54,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 15 states have internal predecessors, (61), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 04:33:54,291 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 204 transitions. [2021-11-19 04:33:54,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-19 04:33:54,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:33:54,293 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:33:54,303 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-19 04:33:54,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:33:54,502 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:33:54,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:33:54,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1130035513, now seen corresponding path program 6 times [2021-11-19 04:33:54,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:33:54,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473620583] [2021-11-19 04:33:54,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:33:54,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:33:54,509 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:33:54,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [529003908] [2021-11-19 04:33:54,509 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 04:33:54,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:33:54,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:33:54,511 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:33:54,526 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-19 04:33:54,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-19 04:33:54,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 04:33:54,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 04:33:54,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:33:54,978 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 48 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 04:33:54,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:33:55,210 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 32 proven. 20 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-19 04:33:55,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:33:55,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473620583] [2021-11-19 04:33:55,210 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:33:55,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529003908] [2021-11-19 04:33:55,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529003908] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:33:55,211 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:33:55,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-11-19 04:33:55,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299343417] [2021-11-19 04:33:55,212 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:33:55,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-19 04:33:55,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:33:55,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-19 04:33:55,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-11-19 04:33:55,215 INFO L87 Difference]: Start difference. First operand 179 states and 204 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:33:55,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:33:55,631 INFO L93 Difference]: Finished difference Result 240 states and 267 transitions. [2021-11-19 04:33:55,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 04:33:55,633 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 70 [2021-11-19 04:33:55,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:33:55,636 INFO L225 Difference]: With dead ends: 240 [2021-11-19 04:33:55,636 INFO L226 Difference]: Without dead ends: 172 [2021-11-19 04:33:55,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-11-19 04:33:55,639 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 144 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:33:55,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 116 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:33:55,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-19 04:33:55,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 164. [2021-11-19 04:33:55,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 141 states have (on average 1.1134751773049645) internal successors, (157), 142 states have internal predecessors, (157), 12 states have call successors, (12), 9 states have call predecessors, (12), 10 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2021-11-19 04:33:55,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 183 transitions. [2021-11-19 04:33:55,665 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 183 transitions. Word has length 70 [2021-11-19 04:33:55,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:33:55,666 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 183 transitions. [2021-11-19 04:33:55,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-19 04:33:55,666 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 183 transitions. [2021-11-19 04:33:55,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-19 04:33:55,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:33:55,669 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:33:55,702 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-19 04:33:55,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-19 04:33:55,888 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:33:55,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:33:55,889 INFO L85 PathProgramCache]: Analyzing trace with hash -698104178, now seen corresponding path program 7 times [2021-11-19 04:33:55,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:33:55,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977303102] [2021-11-19 04:33:55,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:33:55,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:33:55,895 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:33:55,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [703157726] [2021-11-19 04:33:55,896 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 04:33:55,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:33:55,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:33:55,908 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:33:55,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 04:33:55,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:33:55,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-19 04:33:55,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:33:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 42 proven. 40 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-19 04:33:56,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 04:33:56,449 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 11 proven. 63 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-19 04:33:56,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 04:33:56,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977303102] [2021-11-19 04:33:56,450 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-11-19 04:33:56,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703157726] [2021-11-19 04:33:56,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703157726] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 04:33:56,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-19 04:33:56,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-19 04:33:56,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912033935] [2021-11-19 04:33:56,451 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-19 04:33:56,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 04:33:56,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 04:33:56,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 04:33:56,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-19 04:33:56,452 INFO L87 Difference]: Start difference. First operand 164 states and 183 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 04:33:56,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 04:33:56,828 INFO L93 Difference]: Finished difference Result 210 states and 229 transitions. [2021-11-19 04:33:56,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 04:33:56,829 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 74 [2021-11-19 04:33:56,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 04:33:56,830 INFO L225 Difference]: With dead ends: 210 [2021-11-19 04:33:56,830 INFO L226 Difference]: Without dead ends: 165 [2021-11-19 04:33:56,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-11-19 04:33:56,832 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 104 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 04:33:56,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 183 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 04:33:56,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-11-19 04:33:56,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 156. [2021-11-19 04:33:56,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 135 states have (on average 1.0962962962962963) internal successors, (148), 135 states have internal predecessors, (148), 11 states have call successors, (11), 8 states have call predecessors, (11), 9 states have return successors, (13), 12 states have call predecessors, (13), 11 states have call successors, (13) [2021-11-19 04:33:56,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 172 transitions. [2021-11-19 04:33:56,852 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 172 transitions. Word has length 74 [2021-11-19 04:33:56,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 04:33:56,852 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 172 transitions. [2021-11-19 04:33:56,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 04:33:56,853 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 172 transitions. [2021-11-19 04:33:56,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-19 04:33:56,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 04:33:56,855 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 04:33:56,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-19 04:33:57,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-19 04:33:57,062 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 04:33:57,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 04:33:57,062 INFO L85 PathProgramCache]: Analyzing trace with hash 2141231294, now seen corresponding path program 1 times [2021-11-19 04:33:57,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 04:33:57,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120095322] [2021-11-19 04:33:57,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:33:57,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 04:33:57,080 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-19 04:33:57,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802039095] [2021-11-19 04:33:57,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 04:33:57,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 04:33:57,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 04:33:57,090 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 04:33:57,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e553276b-997f-4ba6-b209-dfef839be40e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-19 04:33:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 04:33:57,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-19 04:33:57,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 04:33:57,948 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 0 case distinctions, treesize of input 24 treesize of output 20 [2021-11-19 04:33:57,963 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 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-19 04:33:58,096 INFO L354 Elim1Store]: treesize reduction 128, result has 19.5 percent of original size [2021-11-19 04:33:58,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 91 [2021-11-19 04:33:58,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:33:58,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 7 [2021-11-19 04:33:58,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:33:58,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 7 [2021-11-19 04:33:58,540 INFO L354 Elim1Store]: treesize reduction 329, result has 18.6 percent of original size [2021-11-19 04:33:58,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 97 treesize of output 138 [2021-11-19 04:33:58,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:33:58,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:33:58,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:33:58,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 44 [2021-11-19 04:33:58,878 INFO L354 Elim1Store]: treesize reduction 330, result has 16.9 percent of original size [2021-11-19 04:33:58,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 88 treesize of output 128 [2021-11-19 04:33:58,922 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-19 04:33:58,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:33:58,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:33:58,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:33:58,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:33:58,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:33:58,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:33:58,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 46 [2021-11-19 04:34:30,896 INFO L354 Elim1Store]: treesize reduction 374, result has 38.3 percent of original size [2021-11-19 04:34:30,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 107 treesize of output 305 [2021-11-19 04:34:34,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:34,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:34,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:34,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:34,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:34,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:34,437 INFO L354 Elim1Store]: treesize reduction 8, result has 92.0 percent of original size [2021-11-19 04:34:34,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 127 treesize of output 170 [2021-11-19 04:34:34,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:34,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:34,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:34,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:34,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:34,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-19 04:34:34,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 60 [2021-11-19 04:35:29,763 INFO L354 Elim1Store]: treesize reduction 1402, result has 40.7 percent of original size [2021-11-19 04:35:29,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 12 new quantified variables, introduced 65 case distinctions, treesize of input 314 treesize of output 1182