./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.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_worker_vcloud-master_on_vcloud-master/run_dir_9aa4ab4d-5e0c-426b-9edf-1192f566bd75/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa4ab4d-5e0c-426b-9edf-1192f566bd75/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa4ab4d-5e0c-426b-9edf-1192f566bd75/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa4ab4d-5e0c-426b-9edf-1192f566bd75/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa4ab4d-5e0c-426b-9edf-1192f566bd75/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa4ab4d-5e0c-426b-9edf-1192f566bd75/bin/utaipan-WLngWcDbfI --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 c8ffdb7e52f13c5228ce15f1d79a563f57556d0a .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 [2021-10-11 02:22:49,039 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:22:49,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:22:49,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:22:49,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:22:49,074 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:22:49,076 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:22:49,078 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:22:49,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:22:49,081 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:22:49,082 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:22:49,084 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:22:49,084 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:22:49,086 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:22:49,087 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:22:49,088 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:22:49,089 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:22:49,090 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:22:49,092 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:22:49,095 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:22:49,096 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:22:49,098 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:22:49,099 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:22:49,100 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:22:49,103 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:22:49,103 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:22:49,104 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:22:49,105 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:22:49,105 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:22:49,106 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:22:49,107 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:22:49,108 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:22:49,109 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:22:49,109 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:22:49,110 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:22:49,111 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:22:49,112 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:22:49,112 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:22:49,112 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:22:49,113 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:22:49,114 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:22:49,115 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa4ab4d-5e0c-426b-9edf-1192f566bd75/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:22:49,140 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:22:49,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:22:49,141 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:22:49,142 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:22:49,142 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:22:49,143 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:22:49,143 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:22:49,143 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:22:49,144 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:22:49,144 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:22:49,144 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:22:49,145 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:22:49,145 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:22:49,146 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:22:49,146 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:22:49,147 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:22:49,147 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:22:49,148 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:22:49,148 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:22:49,149 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:22:49,149 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:22:49,149 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:22:49,150 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:22:49,150 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:22:49,150 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:22:49,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:22:49,151 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:22:49,152 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:22:49,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:22:49,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:22:49,152 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:22:49,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:22:49,153 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:22:49,153 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:22:49,153 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:22:49,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:22:49,154 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:22:49,154 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:22:49,154 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:22:49,155 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_worker_vcloud-master_on_vcloud-master/run_dir_9aa4ab4d-5e0c-426b-9edf-1192f566bd75/bin/utaipan-WLngWcDbfI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa4ab4d-5e0c-426b-9edf-1192f566bd75/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8ffdb7e52f13c5228ce15f1d79a563f57556d0a [2021-10-11 02:22:49,380 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:22:49,417 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:22:49,419 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:22:49,421 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:22:49,421 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:22:49,422 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa4ab4d-5e0c-426b-9edf-1192f566bd75/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c [2021-10-11 02:22:49,485 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa4ab4d-5e0c-426b-9edf-1192f566bd75/bin/utaipan-WLngWcDbfI/data/8dfe4a1b3/2a50b67a60ea46089bbb620ca52b0abe/FLAG024696d3c [2021-10-11 02:22:49,904 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:22:49,905 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa4ab4d-5e0c-426b-9edf-1192f566bd75/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c [2021-10-11 02:22:49,911 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa4ab4d-5e0c-426b-9edf-1192f566bd75/bin/utaipan-WLngWcDbfI/data/8dfe4a1b3/2a50b67a60ea46089bbb620ca52b0abe/FLAG024696d3c [2021-10-11 02:22:50,309 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa4ab4d-5e0c-426b-9edf-1192f566bd75/bin/utaipan-WLngWcDbfI/data/8dfe4a1b3/2a50b67a60ea46089bbb620ca52b0abe [2021-10-11 02:22:50,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:22:50,313 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:22:50,315 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:22:50,315 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:22:50,319 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:22:50,320 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:22:50" (1/1) ... [2021-10-11 02:22:50,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@526cc1f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:50, skipping insertion in model container [2021-10-11 02:22:50,322 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:22:50" (1/1) ... [2021-10-11 02:22:50,329 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:22:50,345 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:22:50,510 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa4ab4d-5e0c-426b-9edf-1192f566bd75/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c[573,586] [2021-10-11 02:22:50,526 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:22:50,534 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:22:50,546 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa4ab4d-5e0c-426b-9edf-1192f566bd75/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound20.c[573,586] [2021-10-11 02:22:50,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:22:50,566 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:22:50,567 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:50 WrapperNode [2021-10-11 02:22:50,567 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:22:50,568 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:22:50,569 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:22:50,569 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:22:50,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:50" (1/1) ... [2021-10-11 02:22:50,584 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:50" (1/1) ... [2021-10-11 02:22:50,604 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:22:50,605 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:22:50,605 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:22:50,605 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:22:50,614 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:50" (1/1) ... [2021-10-11 02:22:50,615 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:50" (1/1) ... [2021-10-11 02:22:50,616 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:50" (1/1) ... [2021-10-11 02:22:50,617 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:50" (1/1) ... [2021-10-11 02:22:50,620 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:50" (1/1) ... [2021-10-11 02:22:50,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:50" (1/1) ... [2021-10-11 02:22:50,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:50" (1/1) ... [2021-10-11 02:22:50,628 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:22:50,629 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:22:50,629 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:22:50,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:22:50,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:50" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa4ab4d-5e0c-426b-9edf-1192f566bd75/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:22:50,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:22:50,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:22:50,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:22:50,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:22:51,065 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:22:51,065 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-11 02:22:51,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:22:51 BoogieIcfgContainer [2021-10-11 02:22:51,067 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:22:51,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:22:51,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:22:51,085 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:22:51,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:22:50" (1/3) ... [2021-10-11 02:22:51,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@290d3ffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:22:51, skipping insertion in model container [2021-10-11 02:22:51,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:22:50" (2/3) ... [2021-10-11 02:22:51,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@290d3ffc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:22:51, skipping insertion in model container [2021-10-11 02:22:51,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:22:51" (3/3) ... [2021-10-11 02:22:51,089 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound20.c [2021-10-11 02:22:51,118 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:22:51,121 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-10-11 02:22:51,149 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-10-11 02:22:51,173 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:22:51,173 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:22:51,173 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:22:51,173 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:22:51,174 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:22:51,174 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:22:51,174 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:22:51,174 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:22:51,188 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2021-10-11 02:22:51,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:22:51,193 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:51,194 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 02:22:51,194 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:22:51,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:51,200 INFO L82 PathProgramCache]: Analyzing trace with hash 98480205, now seen corresponding path program 1 times [2021-10-11 02:22:51,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:51,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882877106] [2021-10-11 02:22:51,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:51,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:51,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:51,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882877106] [2021-10-11 02:22:51,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:22:51,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:22:51,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613699051] [2021-10-11 02:22:51,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 02:22:51,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:51,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 02:22:51,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:22:51,372 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2021-10-11 02:22:51,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:51,386 INFO L93 Difference]: Finished difference Result 25 states and 33 transitions. [2021-10-11 02:22:51,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 02:22:51,388 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2021-10-11 02:22:51,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:51,395 INFO L225 Difference]: With dead ends: 25 [2021-10-11 02:22:51,396 INFO L226 Difference]: Without dead ends: 11 [2021-10-11 02:22:51,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 02:22:51,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-11 02:22:51,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-11 02:22:51,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-11 02:22:51,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-11 02:22:51,428 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 5 [2021-10-11 02:22:51,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:51,428 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-11 02:22:51,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 02:22:51,429 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-10-11 02:22:51,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:22:51,429 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:51,429 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 02:22:51,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:22:51,430 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:22:51,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:51,431 INFO L82 PathProgramCache]: Analyzing trace with hash 97621232, now seen corresponding path program 1 times [2021-10-11 02:22:51,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:51,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142443120] [2021-10-11 02:22:51,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:51,452 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:22:51,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1133667694] [2021-10-11 02:22:51,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa4ab4d-5e0c-426b-9edf-1192f566bd75/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:22:51,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:51,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-11 02:22:51,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:22:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:51,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:22:51,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:51,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142443120] [2021-10-11 02:22:51,785 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:22:51,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133667694] [2021-10-11 02:22:51,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:22:51,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-11 02:22:51,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587251799] [2021-10-11 02:22:51,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:22:51,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:51,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:22:51,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:22:51,794 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2021-10-11 02:22:51,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:51,899 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-10-11 02:22:51,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:22:51,900 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2021-10-11 02:22:51,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:51,901 INFO L225 Difference]: With dead ends: 20 [2021-10-11 02:22:51,901 INFO L226 Difference]: Without dead ends: 18 [2021-10-11 02:22:51,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-11 02:22:51,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-11 02:22:51,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 9. [2021-10-11 02:22:51,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-11 02:22:51,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-10-11 02:22:51,912 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 5 [2021-10-11 02:22:51,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:51,916 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-11 02:22:51,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:22:51,917 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-10-11 02:22:51,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:22:51,917 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:51,918 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:22:52,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-11 02:22:52,143 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:22:52,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:52,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1268746775, now seen corresponding path program 1 times [2021-10-11 02:22:52,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:52,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483554517] [2021-10-11 02:22:52,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:52,161 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:22:52,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1498454832] [2021-10-11 02:22:52,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa4ab4d-5e0c-426b-9edf-1192f566bd75/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:22:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:52,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 02:22:52,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:22:52,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:52,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:22:52,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:52,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483554517] [2021-10-11 02:22:52,254 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:22:52,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498454832] [2021-10-11 02:22:52,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:22:52,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-11 02:22:52,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514779181] [2021-10-11 02:22:52,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:22:52,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:52,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:22:52,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:22:52,256 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 6 states. [2021-10-11 02:22:52,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:52,298 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-10-11 02:22:52,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:22:52,299 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2021-10-11 02:22:52,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:52,301 INFO L225 Difference]: With dead ends: 23 [2021-10-11 02:22:52,301 INFO L226 Difference]: Without dead ends: 19 [2021-10-11 02:22:52,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:22:52,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-11 02:22:52,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2021-10-11 02:22:52,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-11 02:22:52,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-10-11 02:22:52,312 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 6 [2021-10-11 02:22:52,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:52,313 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-10-11 02:22:52,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:22:52,313 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-10-11 02:22:52,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:22:52,314 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:52,314 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:22:52,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:22:52,527 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:22:52,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:52,528 INFO L82 PathProgramCache]: Analyzing trace with hash 546169794, now seen corresponding path program 1 times [2021-10-11 02:22:52,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:52,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647162397] [2021-10-11 02:22:52,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:52,541 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:22:52,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [662171147] [2021-10-11 02:22:52,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa4ab4d-5e0c-426b-9edf-1192f566bd75/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:22:52,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:52,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-11 02:22:52,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:22:52,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:52,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:22:52,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:52,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647162397] [2021-10-11 02:22:52,780 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:22:52,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662171147] [2021-10-11 02:22:52,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:22:52,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2021-10-11 02:22:52,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778895537] [2021-10-11 02:22:52,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-10-11 02:22:52,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:52,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-11 02:22:52,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-11 02:22:52,782 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 11 states. [2021-10-11 02:22:52,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:52,903 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-10-11 02:22:52,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:22:52,904 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 8 [2021-10-11 02:22:52,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:52,905 INFO L225 Difference]: With dead ends: 19 [2021-10-11 02:22:52,905 INFO L226 Difference]: Without dead ends: 15 [2021-10-11 02:22:52,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:22:52,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-11 02:22:52,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-11 02:22:52,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-11 02:22:52,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-10-11 02:22:52,912 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 8 [2021-10-11 02:22:52,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:52,912 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-10-11 02:22:52,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-10-11 02:22:52,913 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-10-11 02:22:52,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-11 02:22:52,914 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:52,914 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-11 02:22:53,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:22:53,143 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:22:53,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:53,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1998402165, now seen corresponding path program 1 times [2021-10-11 02:22:53,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:53,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297793223] [2021-10-11 02:22:53,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:53,157 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:22:53,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1044752807] [2021-10-11 02:22:53,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa4ab4d-5e0c-426b-9edf-1192f566bd75/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:22:53,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:22:53,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 02:22:53,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:22:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:53,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:22:53,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:53,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297793223] [2021-10-11 02:22:53,323 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:22:53,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044752807] [2021-10-11 02:22:53,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [253413530] [2021-10-11 02:22:53,352 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-11 02:22:53,352 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:22:53,359 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:22:53,366 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:22:53,367 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:22:53,503 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:22:54,123 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:22:54,375 WARN L197 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-10-11 02:22:54,546 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-10-11 02:22:54,812 WARN L197 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-10-11 02:22:54,976 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:22:54,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:22:54,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-10-11 02:22:54,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303887005] [2021-10-11 02:22:54,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-10-11 02:22:54,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:54,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-11 02:22:54,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-10-11 02:22:54,978 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 10 states. [2021-10-11 02:22:55,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:55,080 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-10-11 02:22:55,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-11 02:22:55,081 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2021-10-11 02:22:55,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:55,082 INFO L225 Difference]: With dead ends: 35 [2021-10-11 02:22:55,082 INFO L226 Difference]: Without dead ends: 31 [2021-10-11 02:22:55,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-10-11 02:22:55,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-11 02:22:55,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-10-11 02:22:55,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 02:22:55,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-10-11 02:22:55,106 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 14 [2021-10-11 02:22:55,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:55,106 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-10-11 02:22:55,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-10-11 02:22:55,106 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-10-11 02:22:55,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-11 02:22:55,107 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:55,107 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1] [2021-10-11 02:22:55,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:22:55,327 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:22:55,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:55,327 INFO L82 PathProgramCache]: Analyzing trace with hash 652162767, now seen corresponding path program 2 times [2021-10-11 02:22:55,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:55,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145280588] [2021-10-11 02:22:55,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:55,340 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:22:55,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1327738768] [2021-10-11 02:22:55,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa4ab4d-5e0c-426b-9edf-1192f566bd75/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:22:55,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-10-11 02:22:55,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:22:55,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-11 02:22:55,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:22:55,532 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:55,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:22:55,697 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:55,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145280588] [2021-10-11 02:22:55,698 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:22:55,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327738768] [2021-10-11 02:22:55,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1898072552] [2021-10-11 02:22:55,701 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-11 02:22:55,701 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:22:55,701 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:22:55,701 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:22:55,701 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:22:55,748 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:22:56,222 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:22:56,448 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-10-11 02:22:56,589 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-10-11 02:22:56,844 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-10-11 02:22:57,021 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:22:57,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:22:57,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-10-11 02:22:57,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252877461] [2021-10-11 02:22:57,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-10-11 02:22:57,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:57,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-11 02:22:57,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=449, Unknown=0, NotChecked=0, Total=600 [2021-10-11 02:22:57,024 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 18 states. [2021-10-11 02:22:57,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:57,276 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2021-10-11 02:22:57,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-11 02:22:57,277 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 30 [2021-10-11 02:22:57,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:57,278 INFO L225 Difference]: With dead ends: 67 [2021-10-11 02:22:57,278 INFO L226 Difference]: Without dead ends: 63 [2021-10-11 02:22:57,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=366, Invalid=1040, Unknown=0, NotChecked=0, Total=1406 [2021-10-11 02:22:57,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-11 02:22:57,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-10-11 02:22:57,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-10-11 02:22:57,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-10-11 02:22:57,293 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 30 [2021-10-11 02:22:57,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:57,293 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-10-11 02:22:57,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-10-11 02:22:57,293 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-10-11 02:22:57,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-10-11 02:22:57,295 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:57,296 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1] [2021-10-11 02:22:57,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-10-11 02:22:57,519 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:22:57,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:57,519 INFO L82 PathProgramCache]: Analyzing trace with hash -43060905, now seen corresponding path program 3 times [2021-10-11 02:22:57,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:57,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360473681] [2021-10-11 02:22:57,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:57,530 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:22:57,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1309387857] [2021-10-11 02:22:57,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa4ab4d-5e0c-426b-9edf-1192f566bd75/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:22:57,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 02:22:57,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:22:57,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-11 02:22:57,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:22:57,865 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:57,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:22:58,080 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:22:58,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360473681] [2021-10-11 02:22:58,080 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:22:58,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309387857] [2021-10-11 02:22:58,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1860739871] [2021-10-11 02:22:58,083 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-11 02:22:58,083 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:22:58,083 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:22:58,083 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:22:58,083 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:22:58,126 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:22:58,433 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:22:58,645 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-10-11 02:22:58,815 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 45 [2021-10-11 02:22:59,090 WARN L197 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-10-11 02:22:59,255 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:22:59,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:22:59,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 23 [2021-10-11 02:22:59,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45347896] [2021-10-11 02:22:59,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-10-11 02:22:59,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:22:59,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-11 02:22:59,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=668, Unknown=0, NotChecked=0, Total=930 [2021-10-11 02:22:59,258 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 24 states. [2021-10-11 02:22:59,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:22:59,708 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2021-10-11 02:22:59,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-11 02:22:59,709 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 62 [2021-10-11 02:22:59,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:22:59,710 INFO L225 Difference]: With dead ends: 91 [2021-10-11 02:22:59,711 INFO L226 Difference]: Without dead ends: 87 [2021-10-11 02:22:59,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=695, Invalid=1755, Unknown=0, NotChecked=0, Total=2450 [2021-10-11 02:22:59,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-11 02:22:59,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-10-11 02:22:59,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2021-10-11 02:22:59,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-10-11 02:22:59,727 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 62 [2021-10-11 02:22:59,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:22:59,727 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-10-11 02:22:59,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-10-11 02:22:59,728 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-10-11 02:22:59,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-11 02:22:59,729 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:22:59,729 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1] [2021-10-11 02:22:59,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:22:59,951 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:22:59,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:22:59,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1481783235, now seen corresponding path program 4 times [2021-10-11 02:22:59,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:22:59,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105929721] [2021-10-11 02:22:59,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:22:59,963 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:22:59,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281415887] [2021-10-11 02:22:59,964 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa4ab4d-5e0c-426b-9edf-1192f566bd75/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:23:00,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:23:00,108 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:23:00,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:23:00,177 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:23:00,510 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:23:00,510 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:23:00,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:00,799 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:23:00 BoogieIcfgContainer [2021-10-11 02:23:00,800 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:23:00,800 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:23:00,800 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:23:00,800 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:23:00,801 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:22:51" (3/4) ... [2021-10-11 02:23:00,803 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:23:00,931 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9aa4ab4d-5e0c-426b-9edf-1192f566bd75/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:23:00,932 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:23:00,933 INFO L168 Benchmark]: Toolchain (without parser) took 10618.81 ms. Allocated memory was 98.6 MB in the beginning and 224.4 MB in the end (delta: 125.8 MB). Free memory was 66.8 MB in the beginning and 115.5 MB in the end (delta: -48.8 MB). Peak memory consumption was 76.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:00,933 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 98.6 MB. Free memory was 55.4 MB in the beginning and 55.3 MB in the end (delta: 77.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:23:00,933 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.31 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 66.5 MB in the beginning and 94.4 MB in the end (delta: -27.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:00,934 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.92 ms. Allocated memory is still 119.5 MB. Free memory was 94.4 MB in the beginning and 93.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:00,934 INFO L168 Benchmark]: Boogie Preprocessor took 23.46 ms. Allocated memory is still 119.5 MB. Free memory was 93.2 MB in the beginning and 91.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:00,935 INFO L168 Benchmark]: RCFGBuilder took 438.27 ms. Allocated memory is still 119.5 MB. Free memory was 91.8 MB in the beginning and 71.3 MB in the end (delta: 20.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:00,935 INFO L168 Benchmark]: TraceAbstraction took 9730.90 ms. Allocated memory was 119.5 MB in the beginning and 224.4 MB in the end (delta: 104.9 MB). Free memory was 71.3 MB in the beginning and 122.9 MB in the end (delta: -51.5 MB). Peak memory consumption was 56.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:00,936 INFO L168 Benchmark]: Witness Printer took 131.56 ms. Allocated memory is still 224.4 MB. Free memory was 122.9 MB in the beginning and 115.5 MB in the end (delta: 7.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:00,939 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 98.6 MB. Free memory was 55.4 MB in the beginning and 55.3 MB in the end (delta: 77.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 252.31 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 66.5 MB in the beginning and 94.4 MB in the end (delta: -27.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.92 ms. Allocated memory is still 119.5 MB. Free memory was 94.4 MB in the beginning and 93.2 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.46 ms. Allocated memory is still 119.5 MB. Free memory was 93.2 MB in the beginning and 91.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 438.27 ms. Allocated memory is still 119.5 MB. Free memory was 91.8 MB in the beginning and 71.3 MB in the end (delta: 20.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9730.90 ms. Allocated memory was 119.5 MB in the beginning and 224.4 MB in the end (delta: 104.9 MB). Free memory was 71.3 MB in the beginning and 122.9 MB in the end (delta: -51.5 MB). Peak memory consumption was 56.5 MB. Max. memory is 16.1 GB. * Witness Printer took 131.56 ms. Allocated memory is still 224.4 MB. Free memory was 122.9 MB in the beginning and 115.5 MB in the end (delta: 7.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L13] COND FALSE !(!cond) [L13] COND FALSE !(!cond) [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [counter=0] [L36] EXPR counter++ VAL [counter=1] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=1] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=1] [L36] EXPR counter++ VAL [counter=2] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=2] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=2] [L36] EXPR counter++ VAL [counter=3] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=3] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=3] [L36] EXPR counter++ VAL [counter=4] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=4] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=4] [L36] EXPR counter++ VAL [counter=5] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=5] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=5] [L36] EXPR counter++ VAL [counter=6] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=6] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=6] [L36] EXPR counter++ VAL [counter=7] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=7] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=7] [L36] EXPR counter++ VAL [counter=8] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=8] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=8] [L36] EXPR counter++ VAL [counter=9] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=9] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=9] [L36] EXPR counter++ VAL [counter=10] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=10] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=10] [L36] EXPR counter++ VAL [counter=11] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=11] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=11] [L36] EXPR counter++ VAL [counter=12] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=12] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=12] [L36] EXPR counter++ VAL [counter=13] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=13] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=13] [L36] EXPR counter++ VAL [counter=14] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=14] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=14] [L36] EXPR counter++ VAL [counter=15] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=15] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=15] [L36] EXPR counter++ VAL [counter=16] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=16] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=16] [L36] EXPR counter++ VAL [counter=17] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=17] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=17] [L36] EXPR counter++ VAL [counter=18] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=18] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=18] [L36] EXPR counter++ VAL [counter=19] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=19] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=19] [L36] EXPR counter++ VAL [counter=20] [L36] COND TRUE counter++<20 [L16] COND FALSE !(!(cond)) VAL [counter=20] [L39] COND FALSE !(!(y3 != 0)) [L41] COND FALSE !(y2 + 1 == x2) [L46] y2 = y2 + 1 [L47] y3 = y3 - 1 VAL [counter=20] [L36] EXPR counter++ VAL [counter=21] [L36] COND FALSE !(counter++<20) [L16] COND TRUE !(cond) VAL [counter=21] [L18] reach_error() VAL [counter=21] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 2 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 9.5s, OverallIterations: 8, TraceHistogramMax: 21, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 56 SDtfs, 70 SDslu, 194 SDs, 0 SdLazy, 158 SolverSat, 52 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 389 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 3.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred 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, 7 MinimizatonAttempts, 13 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 216 NumberOfCodeBlocks, 216 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 242 ConstructedInterpolants, 0 QuantifiedInterpolants, 28295 SizeOfPredicates, 44 NumberOfNonLiveVariables, 637 ConjunctsInSsa, 93 ConjunctsInUnsatCore, 13 InterpolantComputations, 7 PerfectInterpolantSequences, 0/944 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...