./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/diamond_1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_8b9f717d-6c1d-4fa6-be6f-7688d65ce6e7/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_8b9f717d-6c1d-4fa6-be6f-7688d65ce6e7/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_8b9f717d-6c1d-4fa6-be6f-7688d65ce6e7/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_8b9f717d-6c1d-4fa6-be6f-7688d65ce6e7/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/diamond_1-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_8b9f717d-6c1d-4fa6-be6f-7688d65ce6e7/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_8b9f717d-6c1d-4fa6-be6f-7688d65ce6e7/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 98a25bc9184960cfd1e3dbcc73ba5f610d35e2a4 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 07:46:53,842 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 07:46:53,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 07:46:53,880 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 07:46:53,880 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 07:46:53,881 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 07:46:53,882 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 07:46:53,884 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 07:46:53,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 07:46:53,886 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 07:46:53,887 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 07:46:53,888 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 07:46:53,889 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 07:46:53,889 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 07:46:53,890 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 07:46:53,891 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 07:46:53,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 07:46:53,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 07:46:53,894 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 07:46:53,896 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 07:46:53,898 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 07:46:53,899 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 07:46:53,900 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 07:46:53,901 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 07:46:53,903 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 07:46:53,904 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 07:46:53,904 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 07:46:53,905 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 07:46:53,905 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 07:46:53,906 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 07:46:53,906 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 07:46:53,907 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 07:46:53,908 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 07:46:53,908 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 07:46:53,909 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 07:46:53,909 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 07:46:53,910 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 07:46:53,910 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 07:46:53,910 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 07:46:53,911 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 07:46:53,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 07:46:53,912 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_8b9f717d-6c1d-4fa6-be6f-7688d65ce6e7/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 07:46:53,932 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 07:46:53,932 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 07:46:53,933 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 07:46:53,933 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 07:46:53,933 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 07:46:53,933 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 07:46:53,933 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 07:46:53,933 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 07:46:53,933 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 07:46:53,933 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 07:46:53,934 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 07:46:53,934 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 07:46:53,934 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 07:46:53,934 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 07:46:53,934 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 07:46:53,935 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 07:46:53,935 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 07:46:53,935 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 07:46:53,935 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 07:46:53,935 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 07:46:53,935 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 07:46:53,935 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 07:46:53,935 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 07:46:53,936 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 07:46:53,936 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 07:46:53,936 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 07:46:53,936 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 07:46:53,936 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 07:46:53,936 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 07:46:53,936 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 07:46:53,936 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 07:46:53,937 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 07:46:53,937 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 07:46:53,937 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 07:46:53,937 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 07:46:53,937 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 07:46:53,937 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 07:46:53,937 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 07:46:53,937 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 07:46:53,937 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_8b9f717d-6c1d-4fa6-be6f-7688d65ce6e7/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_8b9f717d-6c1d-4fa6-be6f-7688d65ce6e7/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 98a25bc9184960cfd1e3dbcc73ba5f610d35e2a4 [2020-12-09 07:46:54,131 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 07:46:54,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 07:46:54,147 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 07:46:54,148 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 07:46:54,149 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 07:46:54,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_8b9f717d-6c1d-4fa6-be6f-7688d65ce6e7/bin/utaipan/../../sv-benchmarks/c/loop-acceleration/diamond_1-2.c [2020-12-09 07:46:54,195 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8b9f717d-6c1d-4fa6-be6f-7688d65ce6e7/bin/utaipan/data/313e06fae/7be439ebdbf4489c8651c67857c99aba/FLAGb5b85e5a7 [2020-12-09 07:46:54,561 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 07:46:54,561 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_8b9f717d-6c1d-4fa6-be6f-7688d65ce6e7/sv-benchmarks/c/loop-acceleration/diamond_1-2.c [2020-12-09 07:46:54,566 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_8b9f717d-6c1d-4fa6-be6f-7688d65ce6e7/bin/utaipan/data/313e06fae/7be439ebdbf4489c8651c67857c99aba/FLAGb5b85e5a7 [2020-12-09 07:46:54,575 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_8b9f717d-6c1d-4fa6-be6f-7688d65ce6e7/bin/utaipan/data/313e06fae/7be439ebdbf4489c8651c67857c99aba [2020-12-09 07:46:54,577 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 07:46:54,578 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 07:46:54,579 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 07:46:54,580 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 07:46:54,583 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 07:46:54,583 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:46:54" (1/1) ... [2020-12-09 07:46:54,585 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e10f289 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:46:54, skipping insertion in model container [2020-12-09 07:46:54,585 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:46:54" (1/1) ... [2020-12-09 07:46:54,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 07:46:54,601 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 07:46:54,700 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_8b9f717d-6c1d-4fa6-be6f-7688d65ce6e7/sv-benchmarks/c/loop-acceleration/diamond_1-2.c[373,386] [2020-12-09 07:46:54,708 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:46:54,714 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 07:46:54,723 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_8b9f717d-6c1d-4fa6-be6f-7688d65ce6e7/sv-benchmarks/c/loop-acceleration/diamond_1-2.c[373,386] [2020-12-09 07:46:54,725 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:46:54,736 INFO L208 MainTranslator]: Completed translation [2020-12-09 07:46:54,736 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:46:54 WrapperNode [2020-12-09 07:46:54,736 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 07:46:54,737 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 07:46:54,737 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 07:46:54,737 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 07:46:54,742 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:46:54" (1/1) ... [2020-12-09 07:46:54,748 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:46:54" (1/1) ... [2020-12-09 07:46:54,764 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 07:46:54,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 07:46:54,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 07:46:54,766 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 07:46:54,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:46:54" (1/1) ... [2020-12-09 07:46:54,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:46:54" (1/1) ... [2020-12-09 07:46:54,775 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:46:54" (1/1) ... [2020-12-09 07:46:54,775 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:46:54" (1/1) ... [2020-12-09 07:46:54,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:46:54" (1/1) ... [2020-12-09 07:46:54,782 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:46:54" (1/1) ... [2020-12-09 07:46:54,783 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:46:54" (1/1) ... [2020-12-09 07:46:54,784 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 07:46:54,785 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 07:46:54,785 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 07:46:54,785 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 07:46:54,786 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:46:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8b9f717d-6c1d-4fa6-be6f-7688d65ce6e7/bin/utaipan/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 [2020-12-09 07:46:54,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 07:46:54,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 07:46:54,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 07:46:54,849 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 07:46:55,044 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 07:46:55,044 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2020-12-09 07:46:55,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:46:55 BoogieIcfgContainer [2020-12-09 07:46:55,046 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 07:46:55,048 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 07:46:55,048 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 07:46:55,052 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 07:46:55,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:46:54" (1/3) ... [2020-12-09 07:46:55,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d6abf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:46:55, skipping insertion in model container [2020-12-09 07:46:55,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:46:54" (2/3) ... [2020-12-09 07:46:55,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10d6abf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:46:55, skipping insertion in model container [2020-12-09 07:46:55,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:46:55" (3/3) ... [2020-12-09 07:46:55,055 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_1-2.c [2020-12-09 07:46:55,068 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 07:46:55,071 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 07:46:55,081 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 07:46:55,102 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 07:46:55,103 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 07:46:55,103 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 07:46:55,103 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 07:46:55,103 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 07:46:55,103 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 07:46:55,103 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 07:46:55,103 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 07:46:55,114 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2020-12-09 07:46:55,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 07:46:55,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:46:55,119 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 07:46:55,119 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:46:55,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:46:55,124 INFO L82 PathProgramCache]: Analyzing trace with hash 2003494, now seen corresponding path program 1 times [2020-12-09 07:46:55,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:46:55,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692180505] [2020-12-09 07:46:55,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:46:55,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:46:55,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:46:55,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692180505] [2020-12-09 07:46:55,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:46:55,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 07:46:55,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153618461] [2020-12-09 07:46:55,262 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 07:46:55,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:46:55,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 07:46:55,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 07:46:55,273 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 3 states. [2020-12-09 07:46:55,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:46:55,288 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2020-12-09 07:46:55,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 07:46:55,290 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 07:46:55,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:46:55,295 INFO L225 Difference]: With dead ends: 13 [2020-12-09 07:46:55,295 INFO L226 Difference]: Without dead ends: 6 [2020-12-09 07:46:55,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 07:46:55,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2020-12-09 07:46:55,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2020-12-09 07:46:55,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-12-09 07:46:55,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2020-12-09 07:46:55,319 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2020-12-09 07:46:55,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:46:55,319 INFO L481 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2020-12-09 07:46:55,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 07:46:55,320 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2020-12-09 07:46:55,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 07:46:55,320 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:46:55,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 07:46:55,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 07:46:55,320 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:46:55,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:46:55,321 INFO L82 PathProgramCache]: Analyzing trace with hash 62181314, now seen corresponding path program 1 times [2020-12-09 07:46:55,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:46:55,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931452756] [2020-12-09 07:46:55,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:46:55,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:46:55,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:46:55,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931452756] [2020-12-09 07:46:55,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178927835] [2020-12-09 07:46:55,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8b9f717d-6c1d-4fa6-be6f-7688d65ce6e7/bin/utaipan/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 [2020-12-09 07:46:55,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:46:55,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 07:46:55,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:46:55,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:46:55,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:46:55,545 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-12-09 07:46:55,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:46:55,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [401515888] [2020-12-09 07:46:55,595 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2020-12-09 07:46:55,595 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 07:46:55,599 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 07:46:55,602 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 07:46:55,603 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 07:46:55,812 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 07:46:55,930 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-12-09 07:46:56,046 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 07:46:56,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 07:46:56,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2020-12-09 07:46:56,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69443698] [2020-12-09 07:46:56,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 07:46:56,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:46:56,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 07:46:56,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-12-09 07:46:56,049 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 7 states. [2020-12-09 07:46:56,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:46:56,112 INFO L93 Difference]: Finished difference Result 12 states and 14 transitions. [2020-12-09 07:46:56,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 07:46:56,113 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 5 [2020-12-09 07:46:56,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:46:56,113 INFO L225 Difference]: With dead ends: 12 [2020-12-09 07:46:56,114 INFO L226 Difference]: Without dead ends: 9 [2020-12-09 07:46:56,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-09 07:46:56,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-12-09 07:46:56,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-12-09 07:46:56,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-12-09 07:46:56,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-12-09 07:46:56,116 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2020-12-09 07:46:56,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:46:56,116 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-12-09 07:46:56,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 07:46:56,117 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-12-09 07:46:56,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 07:46:56,117 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:46:56,117 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1] [2020-12-09 07:46:56,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-09 07:46:56,319 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:46:56,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:46:56,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1385109798, now seen corresponding path program 2 times [2020-12-09 07:46:56,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:46:56,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687464327] [2020-12-09 07:46:56,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:46:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:46:56,558 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:46:56,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687464327] [2020-12-09 07:46:56,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144690825] [2020-12-09 07:46:56,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8b9f717d-6c1d-4fa6-be6f-7688d65ce6e7/bin/utaipan/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 [2020-12-09 07:46:56,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-09 07:46:56,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 07:46:56,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 07:46:56,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:46:56,675 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:46:56,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:46:56,930 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:46:56,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [66527176] [2020-12-09 07:46:56,933 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2020-12-09 07:46:56,933 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 07:46:56,933 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 07:46:56,933 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 07:46:56,934 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 07:46:57,040 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 07:46:57,333 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 07:46:57,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 07:46:57,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2020-12-09 07:46:57,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821555988] [2020-12-09 07:46:57,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-09 07:46:57,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:46:57,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-09 07:46:57,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-12-09 07:46:57,335 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 13 states. [2020-12-09 07:46:57,745 WARN L197 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 18 [2020-12-09 07:46:58,027 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 32 [2020-12-09 07:46:58,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:46:58,461 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2020-12-09 07:46:58,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-09 07:46:58,461 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 8 [2020-12-09 07:46:58,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:46:58,462 INFO L225 Difference]: With dead ends: 18 [2020-12-09 07:46:58,462 INFO L226 Difference]: Without dead ends: 15 [2020-12-09 07:46:58,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2020-12-09 07:46:58,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-12-09 07:46:58,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-12-09 07:46:58,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-12-09 07:46:58,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-12-09 07:46:58,467 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2020-12-09 07:46:58,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:46:58,467 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-12-09 07:46:58,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-09 07:46:58,467 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-12-09 07:46:58,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 07:46:58,468 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:46:58,468 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1] [2020-12-09 07:46:58,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:46:58,669 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:46:58,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:46:58,669 INFO L82 PathProgramCache]: Analyzing trace with hash 318788518, now seen corresponding path program 3 times [2020-12-09 07:46:58,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:46:58,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260578526] [2020-12-09 07:46:58,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:46:58,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:46:58,965 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:46:58,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260578526] [2020-12-09 07:46:58,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999473705] [2020-12-09 07:46:58,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8b9f717d-6c1d-4fa6-be6f-7688d65ce6e7/bin/utaipan/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 [2020-12-09 07:46:58,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 07:46:58,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 07:46:58,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 07:46:58,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:46:59,233 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:46:59,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:47:00,032 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:47:00,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1973598009] [2020-12-09 07:47:00,033 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2020-12-09 07:47:00,033 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 07:47:00,034 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 07:47:00,034 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 07:47:00,034 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 07:47:00,106 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 07:47:00,466 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 07:47:00,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 07:47:00,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2020-12-09 07:47:00,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152602833] [2020-12-09 07:47:00,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-09 07:47:00,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:47:00,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-09 07:47:00,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=557, Unknown=0, NotChecked=0, Total=756 [2020-12-09 07:47:00,468 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 25 states. [2020-12-09 07:47:08,167 WARN L197 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 154 DAG size of output: 18 [2020-12-09 07:47:14,757 WARN L197 SmtUtils]: Spent 4.21 s on a formula simplification. DAG size of input: 146 DAG size of output: 32 [2020-12-09 07:47:21,522 WARN L197 SmtUtils]: Spent 1.97 s on a formula simplification. DAG size of input: 128 DAG size of output: 32 [2020-12-09 07:47:28,734 WARN L197 SmtUtils]: Spent 1.59 s on a formula simplification. DAG size of input: 118 DAG size of output: 32 [2020-12-09 07:47:34,245 WARN L197 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 32 [2020-12-09 07:47:38,025 WARN L197 SmtUtils]: Spent 366.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 32 [2020-12-09 07:47:42,496 WARN L197 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 32 [2020-12-09 07:47:45,154 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 32 [2020-12-09 07:47:46,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:47:46,365 INFO L93 Difference]: Finished difference Result 30 states and 41 transitions. [2020-12-09 07:47:46,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-09 07:47:46,366 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 14 [2020-12-09 07:47:46,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:47:46,367 INFO L225 Difference]: With dead ends: 30 [2020-12-09 07:47:46,367 INFO L226 Difference]: Without dead ends: 27 [2020-12-09 07:47:46,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 47.1s TimeCoverageRelationStatistics Valid=444, Invalid=957, Unknown=5, NotChecked=0, Total=1406 [2020-12-09 07:47:46,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-09 07:47:46,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-09 07:47:46,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-09 07:47:46,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-12-09 07:47:46,372 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 14 [2020-12-09 07:47:46,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:47:46,372 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-12-09 07:47:46,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-09 07:47:46,372 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-12-09 07:47:46,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-09 07:47:46,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:47:46,373 INFO L422 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1] [2020-12-09 07:47:46,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 07:47:46,574 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:47:46,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:47:46,575 INFO L82 PathProgramCache]: Analyzing trace with hash 657008806, now seen corresponding path program 4 times [2020-12-09 07:47:46,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:47:46,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022083676] [2020-12-09 07:47:46,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:47:46,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:47:47,417 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:47:47,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022083676] [2020-12-09 07:47:47,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902722735] [2020-12-09 07:47:47,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8b9f717d-6c1d-4fa6-be6f-7688d65ce6e7/bin/utaipan/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 [2020-12-09 07:47:47,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:47:47,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-09 07:47:47,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:47:48,131 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:47:48,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:47:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:47:51,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1710672464] [2020-12-09 07:47:51,969 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2020-12-09 07:47:51,969 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 07:47:51,969 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 07:47:51,970 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 07:47:51,970 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 07:47:52,041 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 07:47:52,691 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 07:47:52,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 07:47:52,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2020-12-09 07:47:52,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382421111] [2020-12-09 07:47:52,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-09 07:47:52,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:47:52,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-09 07:47:52,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=1973, Unknown=0, NotChecked=0, Total=2652 [2020-12-09 07:47:52,693 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 49 states. [2020-12-09 07:48:30,491 WARN L197 SmtUtils]: Spent 24.41 s on a formula simplification. DAG size of input: 322 DAG size of output: 18 [2020-12-09 07:49:14,056 WARN L197 SmtUtils]: Spent 25.15 s on a formula simplification. DAG size of input: 314 DAG size of output: 32 [2020-12-09 07:49:48,260 WARN L197 SmtUtils]: Spent 15.49 s on a formula simplification. DAG size of input: 296 DAG size of output: 32 [2020-12-09 07:50:43,989 WARN L197 SmtUtils]: Spent 33.19 s on a formula simplification. DAG size of input: 286 DAG size of output: 32 [2020-12-09 07:50:46,016 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (= (mod c_ULTIMATE.start_main_~y~0 2) 0)) (.cse0 (* c_ULTIMATE.start_main_~x~0 (- 1)))) (let ((.cse4 (<= (div (+ .cse0 96) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967294)) 4294967296) 1))) (.cse6 (<= (div (+ .cse0 84) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967282)) 4294967296) 1))) (.cse3 (<= (div (+ .cse0 90) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967288)) 4294967296) 1))) (.cse5 (<= (div (+ .cse0 82) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967280)) 4294967296) 1))) (.cse9 (<= (div (+ .cse0 86) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967284)) 4294967296) 1))) (.cse8 (<= (div (+ .cse0 80) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967278)) 4294967296) 1))) (.cse10 (<= (div (+ .cse0 92) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967290)) 4294967296) 1))) (.cse7 (<= (div (+ .cse0 94) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967292)) 4294967296) 1))) (.cse11 (<= (div (+ .cse0 88) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967286)) 4294967296) 1))) (.cse1 (not .cse2))) (and (or (<= (div (+ .cse0 85) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967283)) 4294967296) 1)) .cse1) (or .cse2 (<= (div (+ .cse0 62) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967260)) 4294967296) 1))) (or .cse2 (<= (div (+ .cse0 74) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967272)) 4294967296) 1))) (or .cse2 (<= (div (+ .cse0 72) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967270)) 4294967296) 1))) (or .cse3 .cse1) (or .cse1 .cse4) (or .cse2 .cse5) (or .cse2 .cse4) (or .cse6 .cse2) (or .cse6 .cse1) (or .cse7 .cse1) (or .cse2 .cse8) (or .cse2 (<= (div (+ .cse0 78) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967276)) 4294967296) 1))) (or (<= (div (+ .cse0 89) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967287)) 4294967296) 1)) .cse1) (or .cse2 .cse3) (or .cse1 (<= (div (+ .cse0 97) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967295)) 4294967296) 1))) (or .cse9 .cse2) (or .cse5 .cse1) (or .cse2 (<= (div (+ .cse0 70) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967268)) 4294967296) 1))) (or .cse9 .cse1) (or .cse1 .cse10) (or .cse11 .cse1) (or .cse2 (<= (div (+ .cse0 66) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967264)) 4294967296) 1))) (or .cse8 .cse1) (or .cse2 (<= (div (+ .cse0 68) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967266)) 4294967296) 1))) (or (<= (div (+ .cse0 91) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967289)) 4294967296) 1)) .cse1) (or .cse2 (<= (div (+ .cse0 64) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967262)) 4294967296) 1))) (or (<= (div (+ .cse0 95) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967293)) 4294967296) 1)) .cse1) (or (<= (div (+ .cse0 83) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967281)) 4294967296) 1)) .cse1) (or (<= (div (+ .cse0 93) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967291)) 4294967296) 1)) .cse1) (or .cse2 (<= (div (+ .cse0 76) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967274)) 4294967296) 1))) (or .cse2 .cse10) (or .cse2 .cse7) (or (<= (div (+ .cse0 81) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967279)) 4294967296) 1)) .cse1) (< (mod c_ULTIMATE.start_main_~x~0 4294967296) 99) (or .cse2 .cse11) (or (<= (div (+ .cse0 87) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967285)) 4294967296) 1)) .cse1)))) is different from false [2020-12-09 07:51:19,381 WARN L197 SmtUtils]: Spent 9.55 s on a formula simplification. DAG size of input: 258 DAG size of output: 32 [2020-12-09 07:52:00,757 WARN L197 SmtUtils]: Spent 13.40 s on a formula simplification. DAG size of input: 240 DAG size of output: 32 [2020-12-09 07:52:33,299 WARN L197 SmtUtils]: Spent 9.32 s on a formula simplification. DAG size of input: 230 DAG size of output: 32 [2020-12-09 07:52:35,331 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (= (mod c_ULTIMATE.start_main_~y~0 2) 0)) (.cse0 (* c_ULTIMATE.start_main_~x~0 (- 1)))) (let ((.cse4 (<= (div (+ .cse0 96) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967294)) 4294967296) 1))) (.cse5 (<= (div (+ .cse0 84) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967282)) 4294967296) 1))) (.cse3 (<= (div (+ .cse0 90) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967288)) 4294967296) 1))) (.cse7 (<= (div (+ .cse0 86) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967284)) 4294967296) 1))) (.cse8 (<= (div (+ .cse0 92) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967290)) 4294967296) 1))) (.cse6 (<= (div (+ .cse0 94) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967292)) 4294967296) 1))) (.cse9 (<= (div (+ .cse0 88) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967286)) 4294967296) 1))) (.cse1 (not .cse2))) (and (or (<= (div (+ .cse0 85) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967283)) 4294967296) 1)) .cse1) (or .cse2 (<= (div (+ .cse0 74) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967272)) 4294967296) 1))) (or .cse2 (<= (div (+ .cse0 72) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967270)) 4294967296) 1))) (or .cse3 .cse1) (or .cse1 .cse4) (or .cse2 (<= (div (+ .cse0 82) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967280)) 4294967296) 1))) (or .cse2 .cse4) (or .cse5 .cse2) (or .cse5 .cse1) (or .cse6 .cse1) (or .cse2 (<= (div (+ .cse0 80) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967278)) 4294967296) 1))) (or .cse2 (<= (div (+ .cse0 78) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967276)) 4294967296) 1))) (or (<= (div (+ .cse0 89) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967287)) 4294967296) 1)) .cse1) (or .cse2 .cse3) (or .cse1 (<= (div (+ .cse0 97) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967295)) 4294967296) 1))) (or .cse7 .cse2) (or .cse2 (<= (div (+ .cse0 70) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967268)) 4294967296) 1))) (or .cse7 .cse1) (or .cse1 .cse8) (or .cse9 .cse1) (or (<= (div (+ .cse0 91) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967289)) 4294967296) 1)) .cse1) (or (<= (div (+ .cse0 95) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967293)) 4294967296) 1)) .cse1) (or (<= (div (+ .cse0 93) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967291)) 4294967296) 1)) .cse1) (or .cse2 (<= (div (+ .cse0 76) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967274)) 4294967296) 1))) (or .cse2 .cse8) (or .cse2 .cse6) (< (mod c_ULTIMATE.start_main_~x~0 4294967296) 99) (or .cse2 .cse9) (or (<= (div (+ .cse0 87) (- 4294967296)) (+ (div (+ c_ULTIMATE.start_main_~x~0 (- 4294967285)) 4294967296) 1)) .cse1)))) is different from false [2020-12-09 07:53:18,624 WARN L197 SmtUtils]: Spent 12.33 s on a formula simplification. DAG size of input: 202 DAG size of output: 32 [2020-12-09 07:53:55,101 WARN L197 SmtUtils]: Spent 10.98 s on a formula simplification. DAG size of input: 184 DAG size of output: 32 [2020-12-09 07:54:23,028 WARN L197 SmtUtils]: Spent 3.37 s on a formula simplification. DAG size of input: 174 DAG size of output: 32 [2020-12-09 07:54:57,043 WARN L197 SmtUtils]: Spent 3.12 s on a formula simplification. DAG size of input: 156 DAG size of output: 32 [2020-12-09 07:55:25,960 WARN L197 SmtUtils]: Spent 3.63 s on a formula simplification. DAG size of input: 146 DAG size of output: 32 [2020-12-09 07:55:51,289 WARN L197 SmtUtils]: Spent 2.69 s on a formula simplification. DAG size of input: 128 DAG size of output: 32 [2020-12-09 07:56:18,412 WARN L197 SmtUtils]: Spent 2.93 s on a formula simplification. DAG size of input: 118 DAG size of output: 32 [2020-12-09 07:56:42,105 WARN L197 SmtUtils]: Spent 672.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 32 [2020-12-09 07:56:59,227 WARN L197 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 32 [2020-12-09 07:57:09,191 WARN L197 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 32 [2020-12-09 07:57:17,328 WARN L197 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 32 [2020-12-09 07:57:21,550 WARN L197 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2020-12-09 07:57:23,616 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-12-09 07:57:23,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:57:23,749 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2020-12-09 07:57:23,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-09 07:57:23,752 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 26 [2020-12-09 07:57:23,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:57:23,753 INFO L225 Difference]: With dead ends: 54 [2020-12-09 07:57:23,753 INFO L226 Difference]: Without dead ends: 51 [2020-12-09 07:57:23,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 29 SyntacticMatches, 21 SemanticMatches, 72 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 574.5s TimeCoverageRelationStatistics Valid=1557, Invalid=3454, Unknown=109, NotChecked=282, Total=5402 [2020-12-09 07:57:23,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-09 07:57:23,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-12-09 07:57:23,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-09 07:57:23,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-12-09 07:57:23,765 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 26 [2020-12-09 07:57:23,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:57:23,765 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-12-09 07:57:23,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-09 07:57:23,766 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-12-09 07:57:23,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-09 07:57:23,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:57:23,767 INFO L422 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1] [2020-12-09 07:57:23,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-09 07:57:23,969 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:57:23,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:57:23,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1879813466, now seen corresponding path program 5 times [2020-12-09 07:57:23,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:57:23,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088508900] [2020-12-09 07:57:23,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:57:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:57:33,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:57:33,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088508900] [2020-12-09 07:57:33,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802609371] [2020-12-09 07:57:33,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_8b9f717d-6c1d-4fa6-be6f-7688d65ce6e7/bin/utaipan/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 [2020-12-09 07:57:35,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2020-12-09 07:57:35,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 07:57:35,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-09 07:57:35,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 07:57:42,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:57:42,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 07:58:13,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 07:58:13,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2058444879] [2020-12-09 07:58:13,928 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2020-12-09 07:58:13,928 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 07:58:13,928 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 07:58:13,928 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 07:58:13,928 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 07:58:14,064 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 07:58:15,243 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2020-12-09 07:58:15,879 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2020-12-09 07:58:17,068 WARN L197 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-12-09 07:58:17,070 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 07:58:17,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 07:58:17,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2020-12-09 07:58:17,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338066334] [2020-12-09 07:58:17,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-12-09 07:58:17,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:58:17,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-12-09 07:58:17,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1514, Invalid=8386, Unknown=0, NotChecked=0, Total=9900 [2020-12-09 07:58:17,075 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 97 states. [2020-12-09 07:58:26,297 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 32 [2020-12-09 07:58:27,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:58:27,701 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-12-09 07:58:27,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-09 07:58:27,704 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 50 [2020-12-09 07:58:27,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:58:27,705 INFO L225 Difference]: With dead ends: 58 [2020-12-09 07:58:27,705 INFO L226 Difference]: Without dead ends: 55 [2020-12-09 07:58:27,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 53 SyntacticMatches, 45 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 51.9s TimeCoverageRelationStatistics Valid=1620, Invalid=8682, Unknown=0, NotChecked=0, Total=10302 [2020-12-09 07:58:27,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-12-09 07:58:27,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-12-09 07:58:27,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-09 07:58:27,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-12-09 07:58:27,716 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 50 [2020-12-09 07:58:27,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:58:27,717 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-12-09 07:58:27,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-12-09 07:58:27,717 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-12-09 07:58:27,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-09 07:58:27,718 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:58:27,718 INFO L422 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1] [2020-12-09 07:58:27,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-09 07:58:27,920 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:58:27,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:58:27,921 INFO L82 PathProgramCache]: Analyzing trace with hash -2003789402, now seen corresponding path program 6 times [2020-12-09 07:58:27,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:58:27,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156444165] [2020-12-09 07:58:27,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:58:27,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 07:58:27,969 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 07:58:28,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 07:58:28,004 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 07:58:28,022 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 07:58:28,022 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 07:58:28,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-12-09 07:58:28,060 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:58:28 BoogieIcfgContainer [2020-12-09 07:58:28,060 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 07:58:28,060 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 07:58:28,060 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 07:58:28,060 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 07:58:28,061 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:46:55" (3/4) ... [2020-12-09 07:58:28,062 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-09 07:58:28,114 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_8b9f717d-6c1d-4fa6-be6f-7688d65ce6e7/bin/utaipan/witness.graphml [2020-12-09 07:58:28,114 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 07:58:28,115 INFO L168 Benchmark]: Toolchain (without parser) took 693536.39 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 57.1 MB in the beginning and 34.7 MB in the end (delta: 22.5 MB). Peak memory consumption was 43.6 MB. Max. memory is 16.1 GB. [2020-12-09 07:58:28,115 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 96.5 MB. Free memory is still 73.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:58:28,116 INFO L168 Benchmark]: CACSL2BoogieTranslator took 156.84 ms. Allocated memory is still 96.5 MB. Free memory was 56.9 MB in the beginning and 71.7 MB in the end (delta: -14.8 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.1 GB. [2020-12-09 07:58:28,116 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.87 ms. Allocated memory is still 96.5 MB. Free memory was 71.7 MB in the beginning and 70.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 07:58:28,116 INFO L168 Benchmark]: Boogie Preprocessor took 19.19 ms. Allocated memory is still 96.5 MB. Free memory was 70.3 MB in the beginning and 69.3 MB in the end (delta: 997.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:58:28,117 INFO L168 Benchmark]: RCFGBuilder took 261.24 ms. Allocated memory is still 96.5 MB. Free memory was 69.3 MB in the beginning and 68.4 MB in the end (delta: 852.4 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 07:58:28,117 INFO L168 Benchmark]: TraceAbstraction took 693012.09 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 68.0 MB in the beginning and 41.0 MB in the end (delta: 27.0 MB). Peak memory consumption was 52.0 MB. Max. memory is 16.1 GB. [2020-12-09 07:58:28,117 INFO L168 Benchmark]: Witness Printer took 53.96 ms. Allocated memory is still 117.4 MB. Free memory was 41.0 MB in the beginning and 34.7 MB in the end (delta: 6.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 07:58:28,119 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 96.5 MB. Free memory is still 73.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 156.84 ms. Allocated memory is still 96.5 MB. Free memory was 56.9 MB in the beginning and 71.7 MB in the end (delta: -14.8 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 27.87 ms. Allocated memory is still 96.5 MB. Free memory was 71.7 MB in the beginning and 70.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.19 ms. Allocated memory is still 96.5 MB. Free memory was 70.3 MB in the beginning and 69.3 MB in the end (delta: 997.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 261.24 ms. Allocated memory is still 96.5 MB. Free memory was 69.3 MB in the beginning and 68.4 MB in the end (delta: 852.4 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 693012.09 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 68.0 MB in the beginning and 41.0 MB in the end (delta: 27.0 MB). Peak memory consumption was 52.0 MB. Max. memory is 16.1 GB. * Witness Printer took 53.96 ms. Allocated memory is still 117.4 MB. Free memory was 41.0 MB in the beginning and 34.7 MB in the end (delta: 6.3 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L14] unsigned int x = 0; [L15] unsigned int y = __VERIFIER_nondet_uint(); [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND TRUE x < 99 [L18] COND FALSE !(y % 2 == 0) [L21] x += 2 [L17] COND FALSE !(x < 99) [L7] COND TRUE !(cond) [L8] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 692.9s, OverallIterations: 7, TraceHistogramMax: 50, AutomataDifference: 628.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 26 SDtfs, 0 SDslu, 200 SDs, 0 SdLazy, 3449 SolverSat, 187 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 433 GetRequests, 119 SyntacticMatches, 78 SemanticMatches, 236 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2061 ImplicationChecksByTransitivity, 675.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=6, 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, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 55.1s InterpolantComputationTime, 264 NumberOfCodeBlocks, 264 NumberOfCodeBlocksAsserted, 38 NumberOfCheckSat, 297 ConstructedInterpolants, 0 QuantifiedInterpolants, 305507 SizeOfPredicates, 24 NumberOfNonLiveVariables, 371 ConjunctsInSsa, 98 ConjunctsInUnsatCore, 16 InterpolantComputations, 1 PerfectInterpolantSequences, 0/4200 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 incorrect! Received shutdown request...