./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_43490049-30e6-4bf6-a64f-beb26e187d86/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_43490049-30e6-4bf6-a64f-beb26e187d86/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_43490049-30e6-4bf6-a64f-beb26e187d86/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_43490049-30e6-4bf6-a64f-beb26e187d86/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound10.c -s /tmp/vcloud-vcloud-master/worker/run_dir_43490049-30e6-4bf6-a64f-beb26e187d86/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_43490049-30e6-4bf6-a64f-beb26e187d86/bin/uautomizer --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 d1adf19ba27684d12b58eec08a023abe41487958 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 21:09:02,803 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 21:09:02,805 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 21:09:02,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 21:09:02,857 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 21:09:02,859 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 21:09:02,861 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 21:09:02,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 21:09:02,866 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 21:09:02,868 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 21:09:02,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 21:09:02,871 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 21:09:02,872 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 21:09:02,874 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 21:09:02,876 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 21:09:02,877 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 21:09:02,879 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 21:09:02,880 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 21:09:02,883 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 21:09:02,886 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 21:09:02,888 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 21:09:02,890 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 21:09:02,892 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 21:09:02,893 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 21:09:02,897 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 21:09:02,898 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 21:09:02,899 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 21:09:02,900 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 21:09:02,901 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 21:09:02,902 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 21:09:02,903 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 21:09:02,904 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 21:09:02,905 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 21:09:02,906 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 21:09:02,908 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 21:09:02,908 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 21:09:02,909 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 21:09:02,910 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 21:09:02,910 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 21:09:02,912 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 21:09:02,913 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 21:09:02,914 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_43490049-30e6-4bf6-a64f-beb26e187d86/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 21:09:02,942 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 21:09:02,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 21:09:02,944 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 21:09:02,945 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 21:09:02,945 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 21:09:02,946 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 21:09:02,946 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 21:09:02,947 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 21:09:02,947 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 21:09:02,948 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 21:09:02,948 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 21:09:02,948 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 21:09:02,949 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 21:09:02,949 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 21:09:02,950 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 21:09:02,950 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 21:09:02,950 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 21:09:02,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 21:09:02,955 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 21:09:02,955 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 21:09:02,955 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 21:09:02,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 21:09:02,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 21:09:02,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 21:09:02,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 21:09:02,958 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 21:09:02,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 21:09:02,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 21:09:02,959 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 21:09:02,960 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-vcloud-master/worker/run_dir_43490049-30e6-4bf6-a64f-beb26e187d86/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_43490049-30e6-4bf6-a64f-beb26e187d86/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d1adf19ba27684d12b58eec08a023abe41487958 [2020-11-29 21:09:03,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 21:09:03,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 21:09:03,327 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 21:09:03,328 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 21:09:03,329 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 21:09:03,330 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_43490049-30e6-4bf6-a64f-beb26e187d86/bin/uautomizer/../../sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound10.c [2020-11-29 21:09:03,424 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_43490049-30e6-4bf6-a64f-beb26e187d86/bin/uautomizer/data/272d7ced5/94c2bea58ccc450bab420bf22ad1d348/FLAG62940c15a [2020-11-29 21:09:04,016 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 21:09:04,018 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_43490049-30e6-4bf6-a64f-beb26e187d86/sv-benchmarks/c/nla-digbench-scaling/geo2-ll_unwindbound10.c [2020-11-29 21:09:04,031 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_43490049-30e6-4bf6-a64f-beb26e187d86/bin/uautomizer/data/272d7ced5/94c2bea58ccc450bab420bf22ad1d348/FLAG62940c15a [2020-11-29 21:09:04,378 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_43490049-30e6-4bf6-a64f-beb26e187d86/bin/uautomizer/data/272d7ced5/94c2bea58ccc450bab420bf22ad1d348 [2020-11-29 21:09:04,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 21:09:04,383 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 21:09:04,389 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 21:09:04,389 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 21:09:04,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 21:09:04,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:09:04" (1/1) ... [2020-11-29 21:09:04,398 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75c013fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:09:04, skipping insertion in model container [2020-11-29 21:09:04,398 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:09:04" (1/1) ... [2020-11-29 21:09:04,409 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 21:09:04,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 21:09:04,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:09:04,730 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 21:09:04,761 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:09:04,784 INFO L208 MainTranslator]: Completed translation [2020-11-29 21:09:04,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:09:04 WrapperNode [2020-11-29 21:09:04,786 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 21:09:04,788 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 21:09:04,788 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 21:09:04,788 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 21:09:04,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:09:04" (1/1) ... [2020-11-29 21:09:04,810 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:09:04" (1/1) ... [2020-11-29 21:09:04,837 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 21:09:04,838 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 21:09:04,839 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 21:09:04,840 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 21:09:04,849 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:09:04" (1/1) ... [2020-11-29 21:09:04,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:09:04" (1/1) ... [2020-11-29 21:09:04,865 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:09:04" (1/1) ... [2020-11-29 21:09:04,866 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:09:04" (1/1) ... [2020-11-29 21:09:04,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:09:04" (1/1) ... [2020-11-29 21:09:04,875 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:09:04" (1/1) ... [2020-11-29 21:09:04,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:09:04" (1/1) ... [2020-11-29 21:09:04,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 21:09:04,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 21:09:04,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 21:09:04,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 21:09:04,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:09:04" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43490049-30e6-4bf6-a64f-beb26e187d86/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 21:09:04,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 21:09:04,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 21:09:04,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 21:09:04,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 21:09:05,444 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 21:09:05,446 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-11-29 21:09:05,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:09:05 BoogieIcfgContainer [2020-11-29 21:09:05,448 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 21:09:05,452 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 21:09:05,453 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 21:09:05,457 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 21:09:05,457 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 09:09:04" (1/3) ... [2020-11-29 21:09:05,458 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@473fece7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 09:09:05, skipping insertion in model container [2020-11-29 21:09:05,458 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:09:04" (2/3) ... [2020-11-29 21:09:05,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@473fece7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 09:09:05, skipping insertion in model container [2020-11-29 21:09:05,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:09:05" (3/3) ... [2020-11-29 21:09:05,461 INFO L111 eAbstractionObserver]: Analyzing ICFG geo2-ll_unwindbound10.c [2020-11-29 21:09:05,473 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 21:09:05,477 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-11-29 21:09:05,489 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-11-29 21:09:05,526 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 21:09:05,527 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 21:09:05,527 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 21:09:05,527 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 21:09:05,527 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 21:09:05,528 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 21:09:05,528 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 21:09:05,528 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 21:09:05,547 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2020-11-29 21:09:05,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-29 21:09:05,552 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:09:05,553 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-29 21:09:05,553 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:09:05,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:05,561 INFO L82 PathProgramCache]: Analyzing trace with hash 889571274, now seen corresponding path program 1 times [2020-11-29 21:09:05,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:05,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403046740] [2020-11-29 21:09:05,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:05,713 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 21:09:05,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [823358462] [2020-11-29 21:09:05,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43490049-30e6-4bf6-a64f-beb26e187d86/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:09:05,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:05,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 21:09:05,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:09:05,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:09:05,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403046740] [2020-11-29 21:09:05,968 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 21:09:05,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823358462] [2020-11-29 21:09:05,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:09:05,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 21:09:05,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918663110] [2020-11-29 21:09:05,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 21:09:05,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:09:06,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 21:09:06,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 21:09:06,003 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2020-11-29 21:09:06,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:09:06,098 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2020-11-29 21:09:06,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 21:09:06,100 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-29 21:09:06,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:09:06,107 INFO L225 Difference]: With dead ends: 44 [2020-11-29 21:09:06,107 INFO L226 Difference]: Without dead ends: 19 [2020-11-29 21:09:06,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-29 21:09:06,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-29 21:09:06,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2020-11-29 21:09:06,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-29 21:09:06,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-11-29 21:09:06,148 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 6 [2020-11-29 21:09:06,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:09:06,148 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-11-29 21:09:06,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 21:09:06,148 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-11-29 21:09:06,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 21:09:06,158 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:09:06,158 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2020-11-29 21:09:06,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2020-11-29 21:09:06,385 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:09:06,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:06,386 INFO L82 PathProgramCache]: Analyzing trace with hash 885278358, now seen corresponding path program 1 times [2020-11-29 21:09:06,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:06,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671659701] [2020-11-29 21:09:06,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:06,413 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 21:09:06,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1255343719] [2020-11-29 21:09:06,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43490049-30e6-4bf6-a64f-beb26e187d86/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:09:06,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:09:06,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-29 21:09:06,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:09:06,614 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:09:06,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671659701] [2020-11-29 21:09:06,614 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 21:09:06,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255343719] [2020-11-29 21:09:06,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 21:09:06,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-29 21:09:06,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235367212] [2020-11-29 21:09:06,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 21:09:06,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:09:06,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 21:09:06,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 21:09:06,621 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 5 states. [2020-11-29 21:09:06,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:09:06,731 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-11-29 21:09:06,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 21:09:06,734 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-29 21:09:06,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:09:06,735 INFO L225 Difference]: With dead ends: 29 [2020-11-29 21:09:06,735 INFO L226 Difference]: Without dead ends: 23 [2020-11-29 21:09:06,736 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-29 21:09:06,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-29 21:09:06,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-11-29 21:09:06,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-29 21:09:06,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-11-29 21:09:06,747 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 10 [2020-11-29 21:09:06,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:09:06,747 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-11-29 21:09:06,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 21:09:06,749 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-11-29 21:09:06,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-29 21:09:06,752 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:09:06,753 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1] [2020-11-29 21:09:06,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:09:06,973 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:09:06,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:09:06,974 INFO L82 PathProgramCache]: Analyzing trace with hash 542015330, now seen corresponding path program 2 times [2020-11-29 21:09:06,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:09:06,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449387516] [2020-11-29 21:09:06,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:09:06,990 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 21:09:06,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [945052271] [2020-11-29 21:09:06,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43490049-30e6-4bf6-a64f-beb26e187d86/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:09:07,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 21:09:07,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:09:07,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-29 21:09:07,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:09:07,143 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 21:09:07,144 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:09:07,260 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 11 [2020-11-29 21:09:07,388 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:09:09,452 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:09:17,674 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:09:35,421 WARN L193 SmtUtils]: Spent 8.38 s on a formula simplification that was a NOOP. DAG size: 29 [2020-11-29 21:09:37,459 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:09:45,662 WARN L838 $PredicateComparison]: unable to prove that (exists ((ULTIMATE.start_main_~z~0 Int) (ULTIMATE.start_main_~x~0 Int)) (let ((.cse0 (+ ULTIMATE.start_main_~x~0 (- 1)))) (and (not (= (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~x~0) 1) (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~z~0) ULTIMATE.start_main_~x~0))) (= (mod .cse0 ULTIMATE.start_main_~z~0) 0) (not (= ULTIMATE.start_main_~z~0 0)) (let ((.cse1 (div .cse0 ULTIMATE.start_main_~z~0))) (= (+ (* .cse1 ULTIMATE.start_main_~z~0) 1) (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~z~0) .cse1)))))) is different from false [2020-11-29 21:09:45,678 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:09:45,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449387516] [2020-11-29 21:09:45,679 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 21:09:45,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945052271] [2020-11-29 21:09:45,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 21:09:45,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-11-29 21:09:45,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666587538] [2020-11-29 21:09:45,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 21:09:45,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:09:45,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 21:09:45,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=41, Unknown=2, NotChecked=12, Total=72 [2020-11-29 21:09:45,682 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2020-11-29 21:09:56,713 WARN L193 SmtUtils]: Spent 2.92 s on a formula simplification. DAG size of input: 41 DAG size of output: 13 [2020-11-29 21:10:12,165 WARN L193 SmtUtils]: Spent 13.29 s on a formula simplification that was a NOOP. DAG size: 36 [2020-11-29 21:10:28,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:10:28,006 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-11-29 21:10:28,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 21:10:28,023 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-11-29 21:10:28,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:10:28,024 INFO L225 Difference]: With dead ends: 33 [2020-11-29 21:10:28,024 INFO L226 Difference]: Without dead ends: 31 [2020-11-29 21:10:28,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 32.2s TimeCoverageRelationStatistics Valid=27, Invalid=65, Unknown=2, NotChecked=16, Total=110 [2020-11-29 21:10:28,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-29 21:10:28,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2020-11-29 21:10:28,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-29 21:10:28,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-11-29 21:10:28,038 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2020-11-29 21:10:28,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:10:28,038 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-11-29 21:10:28,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 21:10:28,038 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-11-29 21:10:28,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 21:10:28,039 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:10:28,039 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-29 21:10:28,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:10:28,241 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:10:28,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:10:28,241 INFO L82 PathProgramCache]: Analyzing trace with hash -377436604, now seen corresponding path program 1 times [2020-11-29 21:10:28,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:10:28,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559593531] [2020-11-29 21:10:28,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:10:28,258 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 21:10:28,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [871052762] [2020-11-29 21:10:28,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43490049-30e6-4bf6-a64f-beb26e187d86/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:10:28,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:10:28,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 21:10:28,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:10:28,399 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:10:28,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559593531] [2020-11-29 21:10:28,400 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 21:10:28,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871052762] [2020-11-29 21:10:28,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 21:10:28,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-29 21:10:28,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034878582] [2020-11-29 21:10:28,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 21:10:28,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:10:28,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 21:10:28,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-29 21:10:28,422 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-11-29 21:10:28,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:10:28,615 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-11-29 21:10:28,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 21:10:28,616 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-29 21:10:28,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:10:28,617 INFO L225 Difference]: With dead ends: 27 [2020-11-29 21:10:28,617 INFO L226 Difference]: Without dead ends: 23 [2020-11-29 21:10:28,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-29 21:10:28,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-29 21:10:28,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-29 21:10:28,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-29 21:10:28,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-11-29 21:10:28,624 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 15 [2020-11-29 21:10:28,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:10:28,624 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-11-29 21:10:28,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 21:10:28,625 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-11-29 21:10:28,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 21:10:28,625 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:10:28,626 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2020-11-29 21:10:28,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:10:28,853 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:10:28,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:10:28,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1892495811, now seen corresponding path program 1 times [2020-11-29 21:10:28,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:10:28,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454281605] [2020-11-29 21:10:28,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:10:28,865 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 21:10:28,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23330873] [2020-11-29 21:10:28,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43490049-30e6-4bf6-a64f-beb26e187d86/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:10:28,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:10:28,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 21:10:28,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:10:29,757 WARN L193 SmtUtils]: Spent 817.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-11-29 21:10:29,760 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 21:10:29,761 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:10:30,168 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2020-11-29 21:10:30,177 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:10:30,202 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-29 21:10:30,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454281605] [2020-11-29 21:10:30,202 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 21:10:30,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23330873] [2020-11-29 21:10:30,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:10:30,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 21:10:30,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239003737] [2020-11-29 21:10:30,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 21:10:30,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:10:30,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 21:10:30,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 21:10:30,204 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 5 states. [2020-11-29 21:10:30,635 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 12 [2020-11-29 21:10:35,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:10:35,009 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-11-29 21:10:35,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 21:10:35,017 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-11-29 21:10:35,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:10:35,018 INFO L225 Difference]: With dead ends: 27 [2020-11-29 21:10:35,019 INFO L226 Difference]: Without dead ends: 23 [2020-11-29 21:10:35,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-11-29 21:10:35,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-29 21:10:35,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-29 21:10:35,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-29 21:10:35,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-11-29 21:10:35,026 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2020-11-29 21:10:35,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:10:35,026 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-11-29 21:10:35,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 21:10:35,026 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-11-29 21:10:35,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-29 21:10:35,027 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:10:35,027 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2020-11-29 21:10:35,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:10:35,228 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:10:35,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:10:35,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1463251502, now seen corresponding path program 3 times [2020-11-29 21:10:35,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:10:35,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369219156] [2020-11-29 21:10:35,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:10:35,250 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 21:10:35,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1011224683] [2020-11-29 21:10:35,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43490049-30e6-4bf6-a64f-beb26e187d86/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:10:35,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-29 21:10:35,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:10:35,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 21:10:35,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:10:36,660 WARN L193 SmtUtils]: Spent 1.36 s on a formula simplification that was a NOOP. DAG size: 17 [2020-11-29 21:10:36,663 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 21:10:36,663 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:10:44,435 WARN L193 SmtUtils]: Spent 3.27 s on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2020-11-29 21:10:44,444 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:10:46,535 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:10:48,623 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:10:49,050 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-29 21:10:49,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369219156] [2020-11-29 21:10:49,050 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 21:10:49,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011224683] [2020-11-29 21:10:49,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 21:10:49,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-11-29 21:10:49,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447523326] [2020-11-29 21:10:49,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 21:10:49,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:10:49,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 21:10:49,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=19, Unknown=1, NotChecked=0, Total=30 [2020-11-29 21:10:49,053 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 6 states. [2020-11-29 21:11:04,508 WARN L193 SmtUtils]: Spent 2.18 s on a formula simplification that was a NOOP. DAG size: 27 [2020-11-29 21:11:28,573 WARN L193 SmtUtils]: Spent 22.63 s on a formula simplification that was a NOOP. DAG size: 37 [2020-11-29 21:12:09,937 WARN L193 SmtUtils]: Spent 40.82 s on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-11-29 21:12:09,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:12:09,995 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-11-29 21:12:09,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 21:12:09,997 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-11-29 21:12:09,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:12:09,998 INFO L225 Difference]: With dead ends: 23 [2020-11-29 21:12:09,998 INFO L226 Difference]: Without dead ends: 21 [2020-11-29 21:12:09,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 82.6s TimeCoverageRelationStatistics Valid=34, Invalid=53, Unknown=3, NotChecked=0, Total=90 [2020-11-29 21:12:09,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-29 21:12:10,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-11-29 21:12:10,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-29 21:12:10,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-11-29 21:12:10,006 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2020-11-29 21:12:10,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:12:10,007 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-11-29 21:12:10,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 21:12:10,007 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-11-29 21:12:10,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-29 21:12:10,008 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:12:10,008 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2020-11-29 21:12:10,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:12:10,237 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:12:10,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:12:10,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1883886344, now seen corresponding path program 2 times [2020-11-29 21:12:10,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:12:10,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846264509] [2020-11-29 21:12:10,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:12:10,254 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 21:12:10,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [316475379] [2020-11-29 21:12:10,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43490049-30e6-4bf6-a64f-beb26e187d86/bin/uautomizer/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:12:10,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 21:12:10,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:12:10,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-29 21:12:10,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:12:10,404 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:12:10,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846264509] [2020-11-29 21:12:10,405 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 21:12:10,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316475379] [2020-11-29 21:12:10,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-29 21:12:10,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-11-29 21:12:10,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473494360] [2020-11-29 21:12:10,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 21:12:10,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:12:10,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 21:12:10,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-29 21:12:10,407 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2020-11-29 21:12:10,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:12:10,661 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-11-29 21:12:10,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-29 21:12:10,663 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-11-29 21:12:10,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:12:10,663 INFO L225 Difference]: With dead ends: 28 [2020-11-29 21:12:10,663 INFO L226 Difference]: Without dead ends: 24 [2020-11-29 21:12:10,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-11-29 21:12:10,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-29 21:12:10,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-29 21:12:10,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-29 21:12:10,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-11-29 21:12:10,670 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 19 [2020-11-29 21:12:10,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:12:10,670 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-11-29 21:12:10,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 21:12:10,671 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-11-29 21:12:10,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-29 21:12:10,672 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:12:10,672 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-11-29 21:12:10,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:12:10,877 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:12:10,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:12:10,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1162798676, now seen corresponding path program 3 times [2020-11-29 21:12:10,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:12:10,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984357339] [2020-11-29 21:12:10,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:12:10,912 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-11-29 21:12:10,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1769468426] [2020-11-29 21:12:10,913 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_43490049-30e6-4bf6-a64f-beb26e187d86/bin/uautomizer/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:12:10,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-29 21:12:10,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:12:10,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-29 21:12:10,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:12:11,585 WARN L193 SmtUtils]: Spent 591.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-11-29 21:12:11,588 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 2, 1] term [2020-11-29 21:12:11,589 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:12:24,478 WARN L193 SmtUtils]: Spent 6.37 s on a formula simplification. DAG size of input: 28 DAG size of output: 25 [2020-11-29 21:12:24,486 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:12:25,184 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:12:26,166 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-11-29 21:12:26,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984357339] [2020-11-29 21:12:26,167 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-29 21:12:26,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769468426] [2020-11-29 21:12:26,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:12:26,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 21:12:26,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960373363] [2020-11-29 21:12:26,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 21:12:26,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:12:26,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 21:12:26,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=18, Unknown=2, NotChecked=0, Total=30 [2020-11-29 21:12:26,169 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 6 states. [2020-11-29 21:13:10,114 WARN L193 SmtUtils]: Spent 27.06 s on a formula simplification that was a NOOP. DAG size: 37 [2020-11-29 21:13:49,636 WARN L193 SmtUtils]: Spent 37.26 s on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-11-29 21:13:53,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:13:53,773 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-11-29 21:13:53,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 21:13:53,776 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-11-29 21:13:53,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:13:53,776 INFO L225 Difference]: With dead ends: 24 [2020-11-29 21:13:53,776 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 21:13:53,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 87.5s TimeCoverageRelationStatistics Valid=28, Invalid=40, Unknown=4, NotChecked=0, Total=72 [2020-11-29 21:13:53,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 21:13:53,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 21:13:53,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 21:13:53,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 21:13:53,777 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 23 [2020-11-29 21:13:53,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:13:53,778 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 21:13:53,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 21:13:53,778 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 21:13:53,778 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 21:13:53,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2020-11-29 21:13:53,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-29 21:14:00,207 WARN L193 SmtUtils]: Spent 6.15 s on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2020-11-29 21:14:45,099 WARN L193 SmtUtils]: Spent 44.89 s on a formula simplification. DAG size of input: 38 DAG size of output: 36 [2020-11-29 21:14:45,102 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-29 21:14:45,102 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-29 21:14:45,103 INFO L274 CegarLoopResult]: For program point L15(lines 15 18) no Hoare annotation was computed. [2020-11-29 21:14:45,103 INFO L270 CegarLoopResult]: At program point L15-1(lines 37 38) the Hoare annotation is: (let ((.cse0 (= 1 ULTIMATE.start___VERIFIER_assert_~cond)) (.cse1 (= (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~x~0) (+ (* ULTIMATE.start_main_~z~0 ULTIMATE.start_main_~x~0) 1)))) (or (and .cse0 .cse1 (or (let ((.cse2 (+ ULTIMATE.start_main_~x~0 (- 1)))) (and (= (mod ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0) 0) (= (mod .cse2 ULTIMATE.start_main_~z~0) 0) (let ((.cse3 (div .cse2 ULTIMATE.start_main_~z~0))) (= (+ (* ULTIMATE.start_main_~z~0 (div ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0)) .cse3) (+ (* .cse3 ULTIMATE.start_main_~z~0) 1))) (not (= ULTIMATE.start_main_~z~0 0)))) (= ULTIMATE.start_main_~y~0 0))) (and (<= ~counter~0 1) .cse0 .cse1 (= ULTIMATE.start_main_~y~0 1)))) [2020-11-29 21:14:45,103 INFO L274 CegarLoopResult]: For program point L15-2(lines 15 18) no Hoare annotation was computed. [2020-11-29 21:14:45,103 INFO L277 CegarLoopResult]: At program point L15-3(lines 14 20) the Hoare annotation is: true [2020-11-29 21:14:45,103 INFO L274 CegarLoopResult]: For program point L34-1(lines 34 43) no Hoare annotation was computed. [2020-11-29 21:14:45,103 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-29 21:14:45,104 INFO L270 CegarLoopResult]: At program point L34-3(lines 34 43) the Hoare annotation is: (or (and (= 1 ULTIMATE.start___VERIFIER_assert_~cond) (let ((.cse0 (= ULTIMATE.start_main_~z~0 0))) (or (and (= ULTIMATE.start_main_~y~0 0) .cse0) (let ((.cse1 (+ ULTIMATE.start_main_~x~0 (- 1)))) (and (= (mod ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0) 0) (= (mod .cse1 ULTIMATE.start_main_~z~0) 0) (let ((.cse2 (div .cse1 ULTIMATE.start_main_~z~0))) (= (+ (* ULTIMATE.start_main_~z~0 (div ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~z~0)) .cse2) (+ (* .cse2 ULTIMATE.start_main_~z~0) 1))) (not .cse0)))))) (and (= ULTIMATE.start_main_~x~0 1) (<= ~counter~0 0) (= ULTIMATE.start_main_~y~0 1))) [2020-11-29 21:14:45,104 INFO L274 CegarLoopResult]: For program point L34-4(lines 34 43) no Hoare annotation was computed. [2020-11-29 21:14:45,104 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-29 21:14:45,104 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-29 21:14:45,104 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-11-29 21:14:45,104 INFO L274 CegarLoopResult]: For program point L16(lines 16 17) no Hoare annotation was computed. [2020-11-29 21:14:45,104 INFO L274 CegarLoopResult]: For program point L16-1(lines 16 17) no Hoare annotation was computed. [2020-11-29 21:14:45,104 INFO L277 CegarLoopResult]: At program point L45(lines 24 46) the Hoare annotation is: true [2020-11-29 21:14:45,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 09:14:45 BoogieIcfgContainer [2020-11-29 21:14:45,126 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 21:14:45,127 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 21:14:45,127 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 21:14:45,127 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 21:14:45,128 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:09:05" (3/4) ... [2020-11-29 21:14:45,131 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 21:14:45,140 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2020-11-29 21:14:45,140 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-29 21:14:45,141 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 21:14:45,141 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 21:14:45,199 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_43490049-30e6-4bf6-a64f-beb26e187d86/bin/uautomizer/witness.graphml [2020-11-29 21:14:45,200 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 21:14:45,204 INFO L168 Benchmark]: Toolchain (without parser) took 340817.74 ms. Allocated memory is still 107.0 MB. Free memory was 77.7 MB in the beginning and 60.4 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-29 21:14:45,204 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 81.8 MB. Free memory is still 39.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:14:45,205 INFO L168 Benchmark]: CACSL2BoogieTranslator took 397.92 ms. Allocated memory is still 107.0 MB. Free memory was 77.2 MB in the beginning and 84.0 MB in the end (delta: -6.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 21:14:45,206 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.54 ms. Allocated memory is still 107.0 MB. Free memory was 84.0 MB in the beginning and 82.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:14:45,206 INFO L168 Benchmark]: Boogie Preprocessor took 48.30 ms. Allocated memory is still 107.0 MB. Free memory was 82.5 MB in the beginning and 81.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:14:45,209 INFO L168 Benchmark]: RCFGBuilder took 560.71 ms. Allocated memory is still 107.0 MB. Free memory was 81.4 MB in the beginning and 69.3 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-29 21:14:45,210 INFO L168 Benchmark]: TraceAbstraction took 339674.32 ms. Allocated memory is still 107.0 MB. Free memory was 68.8 MB in the beginning and 62.5 MB in the end (delta: 6.3 MB). Peak memory consumption was 38.4 MB. Max. memory is 16.1 GB. [2020-11-29 21:14:45,210 INFO L168 Benchmark]: Witness Printer took 73.11 ms. Allocated memory is still 107.0 MB. Free memory was 62.5 MB in the beginning and 60.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:14:45,213 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 81.8 MB. Free memory is still 39.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 397.92 ms. Allocated memory is still 107.0 MB. Free memory was 77.2 MB in the beginning and 84.0 MB in the end (delta: -6.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.54 ms. Allocated memory is still 107.0 MB. Free memory was 84.0 MB in the beginning and 82.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 48.30 ms. Allocated memory is still 107.0 MB. Free memory was 82.5 MB in the beginning and 81.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 560.71 ms. Allocated memory is still 107.0 MB. Free memory was 81.4 MB in the beginning and 69.3 MB in the end (delta: 12.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 339674.32 ms. Allocated memory is still 107.0 MB. Free memory was 68.8 MB in the beginning and 62.5 MB in the end (delta: 6.3 MB). Peak memory consumption was 38.4 MB. Max. memory is 16.1 GB. * Witness Printer took 73.11 ms. Allocated memory is still 107.0 MB. Free memory was 62.5 MB in the beginning and 60.4 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (1 == cond && ((y == 0 && z == 0) || (((y % z == 0 && (x + -1) % z == 0) && z * (y / z) + (x + -1) / z == (x + -1) / z * z + 1) && !(z == 0)))) || ((x == 1 && counter <= 0) && y == 1) - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: ((1 == cond && z * y + x == z * x + 1) && ((((y % z == 0 && (x + -1) % z == 0) && z * (y / z) + (x + -1) / z == (x + -1) / z * z + 1) && !(z == 0)) || y == 0)) || (((counter <= 1 && 1 == cond) && z * y + x == z * x + 1) && y == 1) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 288.4s, OverallIterations: 8, TraceHistogramMax: 5, AutomataDifference: 216.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 51.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 75 SDtfs, 86 SDslu, 198 SDs, 0 SdLazy, 165 SolverSat, 38 SolverUnsat, 18 SolverUnknown, 0 SolverNotchecked, 49.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 136 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 204.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 15 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 17 NumberOfFragments, 142 HoareAnnotationTreeSize, 4 FomulaSimplifications, 284 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 4 FomulaSimplificationsInter, 143 FormulaSimplificationTreeSizeReductionInter, 51.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 69.2s InterpolantComputationTime, 122 NumberOfCodeBlocks, 102 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 114 ConstructedInterpolants, 2 QuantifiedInterpolants, 13304 SizeOfPredicates, 44 NumberOfNonLiveVariables, 682 ConjunctsInSsa, 95 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 64/104 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...