./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/for_bounded_loop1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a16b2e00-eb15-430d-ac50-082b442981f3/bin/utaipan-tZwUujhuQw/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a16b2e00-eb15-430d-ac50-082b442981f3/bin/utaipan-tZwUujhuQw/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a16b2e00-eb15-430d-ac50-082b442981f3/bin/utaipan-tZwUujhuQw/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a16b2e00-eb15-430d-ac50-082b442981f3/bin/utaipan-tZwUujhuQw/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/for_bounded_loop1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a16b2e00-eb15-430d-ac50-082b442981f3/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a16b2e00-eb15-430d-ac50-082b442981f3/bin/utaipan-tZwUujhuQw --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 d362508cc6d10100af1abe34073a764b50319c9e1ae9c7cc9c70a242e3f5c8c4 ............................................................................................................................................................................................................................................................................................................................................................................................ 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 0.2.1-dev-e943c26 [2021-10-20 05:19:58,679 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-20 05:19:58,681 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-20 05:19:58,733 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-20 05:19:58,733 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-20 05:19:58,739 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-20 05:19:58,741 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-20 05:19:58,746 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-20 05:19:58,749 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-20 05:19:58,756 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-20 05:19:58,757 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-20 05:19:58,759 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-20 05:19:58,760 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-20 05:19:58,763 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-20 05:19:58,766 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-20 05:19:58,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-20 05:19:58,776 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-20 05:19:58,777 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-20 05:19:58,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-20 05:19:58,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-20 05:19:58,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-20 05:19:58,790 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-20 05:19:58,794 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-20 05:19:58,795 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-20 05:19:58,801 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-20 05:19:58,802 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-20 05:19:58,802 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-20 05:19:58,804 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-20 05:19:58,805 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-20 05:19:58,806 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-20 05:19:58,807 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-20 05:19:58,808 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-20 05:19:58,810 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-20 05:19:58,811 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-20 05:19:58,813 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-20 05:19:58,813 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-20 05:19:58,814 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-20 05:19:58,814 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-20 05:19:58,814 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-20 05:19:58,815 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-20 05:19:58,816 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-20 05:19:58,817 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a16b2e00-eb15-430d-ac50-082b442981f3/bin/utaipan-tZwUujhuQw/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-20 05:19:58,861 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-20 05:19:58,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-20 05:19:58,863 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-20 05:19:58,863 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-20 05:19:58,863 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-20 05:19:58,864 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-20 05:19:58,864 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-20 05:19:58,864 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-20 05:19:58,870 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-20 05:19:58,871 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-20 05:19:58,872 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-20 05:19:58,872 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-20 05:19:58,872 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-20 05:19:58,873 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-20 05:19:58,873 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-20 05:19:58,874 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-20 05:19:58,874 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-20 05:19:58,874 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-20 05:19:58,874 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-20 05:19:58,875 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-20 05:19:58,875 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-20 05:19:58,875 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-20 05:19:58,875 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-20 05:19:58,875 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-20 05:19:58,876 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-20 05:19:58,876 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-20 05:19:58,876 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-20 05:19:58,876 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-20 05:19:58,877 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-20 05:19:58,878 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-20 05:19:58,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 05:19:58,879 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-20 05:19:58,879 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-20 05:19:58,879 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-20 05:19:58,879 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-20 05:19:58,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-20 05:19:58,880 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-20 05:19:58,880 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-20 05:19:58,880 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-20 05:19:58,881 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_a16b2e00-eb15-430d-ac50-082b442981f3/bin/utaipan-tZwUujhuQw/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a16b2e00-eb15-430d-ac50-082b442981f3/bin/utaipan-tZwUujhuQw Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d362508cc6d10100af1abe34073a764b50319c9e1ae9c7cc9c70a242e3f5c8c4 [2021-10-20 05:19:59,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-20 05:19:59,142 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-20 05:19:59,145 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-20 05:19:59,146 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-20 05:19:59,147 INFO L275 PluginConnector]: CDTParser initialized [2021-10-20 05:19:59,148 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a16b2e00-eb15-430d-ac50-082b442981f3/bin/utaipan-tZwUujhuQw/../../sv-benchmarks/c/loops/for_bounded_loop1.c [2021-10-20 05:19:59,220 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a16b2e00-eb15-430d-ac50-082b442981f3/bin/utaipan-tZwUujhuQw/data/3d26eed1c/41881d2a2c3042e79c6a5c2c7aee3f51/FLAG3ed6bb6b6 [2021-10-20 05:19:59,667 INFO L306 CDTParser]: Found 1 translation units. [2021-10-20 05:19:59,668 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a16b2e00-eb15-430d-ac50-082b442981f3/sv-benchmarks/c/loops/for_bounded_loop1.c [2021-10-20 05:19:59,674 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a16b2e00-eb15-430d-ac50-082b442981f3/bin/utaipan-tZwUujhuQw/data/3d26eed1c/41881d2a2c3042e79c6a5c2c7aee3f51/FLAG3ed6bb6b6 [2021-10-20 05:20:00,053 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a16b2e00-eb15-430d-ac50-082b442981f3/bin/utaipan-tZwUujhuQw/data/3d26eed1c/41881d2a2c3042e79c6a5c2c7aee3f51 [2021-10-20 05:20:00,056 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-20 05:20:00,058 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-20 05:20:00,059 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-20 05:20:00,060 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-20 05:20:00,063 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-20 05:20:00,064 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:20:00" (1/1) ... [2021-10-20 05:20:00,065 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e1d53c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:20:00, skipping insertion in model container [2021-10-20 05:20:00,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 05:20:00" (1/1) ... [2021-10-20 05:20:00,072 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-20 05:20:00,086 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-20 05:20:00,256 WARN L228 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_a16b2e00-eb15-430d-ac50-082b442981f3/sv-benchmarks/c/loops/for_bounded_loop1.c[416,429] [2021-10-20 05:20:00,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 05:20:00,276 INFO L203 MainTranslator]: Completed pre-run [2021-10-20 05:20:00,289 WARN L228 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_a16b2e00-eb15-430d-ac50-082b442981f3/sv-benchmarks/c/loops/for_bounded_loop1.c[416,429] [2021-10-20 05:20:00,293 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-20 05:20:00,307 INFO L208 MainTranslator]: Completed translation [2021-10-20 05:20:00,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:20:00 WrapperNode [2021-10-20 05:20:00,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-20 05:20:00,309 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-20 05:20:00,309 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-20 05:20:00,309 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-20 05:20:00,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:20:00" (1/1) ... [2021-10-20 05:20:00,323 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:20:00" (1/1) ... [2021-10-20 05:20:00,343 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-20 05:20:00,343 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-20 05:20:00,344 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-20 05:20:00,344 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-20 05:20:00,352 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:20:00" (1/1) ... [2021-10-20 05:20:00,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:20:00" (1/1) ... [2021-10-20 05:20:00,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:20:00" (1/1) ... [2021-10-20 05:20:00,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:20:00" (1/1) ... [2021-10-20 05:20:00,358 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:20:00" (1/1) ... [2021-10-20 05:20:00,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:20:00" (1/1) ... [2021-10-20 05:20:00,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:20:00" (1/1) ... [2021-10-20 05:20:00,365 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-20 05:20:00,366 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-20 05:20:00,366 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-20 05:20:00,367 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-20 05:20:00,370 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:20:00" (1/1) ... [2021-10-20 05:20:00,379 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-20 05:20:00,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a16b2e00-eb15-430d-ac50-082b442981f3/bin/utaipan-tZwUujhuQw/z3 [2021-10-20 05:20:00,404 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a16b2e00-eb15-430d-ac50-082b442981f3/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-20 05:20:00,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a16b2e00-eb15-430d-ac50-082b442981f3/bin/utaipan-tZwUujhuQw/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-20 05:20:00,441 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-20 05:20:00,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-20 05:20:00,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-20 05:20:00,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-20 05:20:00,676 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-20 05:20:00,677 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-20 05:20:00,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:20:00 BoogieIcfgContainer [2021-10-20 05:20:00,680 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-20 05:20:00,682 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-20 05:20:00,682 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-20 05:20:00,686 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-20 05:20:00,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 05:20:00" (1/3) ... [2021-10-20 05:20:00,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@429917ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:20:00, skipping insertion in model container [2021-10-20 05:20:00,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 05:20:00" (2/3) ... [2021-10-20 05:20:00,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@429917ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 05:20:00, skipping insertion in model container [2021-10-20 05:20:00,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:20:00" (3/3) ... [2021-10-20 05:20:00,691 INFO L111 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2021-10-20 05:20:00,696 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-20 05:20:00,697 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-20 05:20:00,749 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-20 05:20:00,756 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-20 05:20:00,757 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-20 05:20:00,772 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:20:00,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-20 05:20:00,777 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:20:00,778 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-20 05:20:00,779 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:20:00,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:20:00,796 INFO L82 PathProgramCache]: Analyzing trace with hash 85235575, now seen corresponding path program 1 times [2021-10-20 05:20:00,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:20:00,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954941173] [2021-10-20 05:20:00,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:20:00,807 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:20:00,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:20:01,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:20:01,070 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:20:01,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954941173] [2021-10-20 05:20:01,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954941173] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:20:01,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:20:01,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 05:20:01,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806075598] [2021-10-20 05:20:01,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-20 05:20:01,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:20:01,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-20 05:20:01,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:20:01,099 INFO L87 Difference]: Start difference. First operand has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:20:01,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:20:01,144 INFO L93 Difference]: Finished difference Result 44 states and 56 transitions. [2021-10-20 05:20:01,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-20 05:20:01,145 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-20 05:20:01,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:20:01,154 INFO L225 Difference]: With dead ends: 44 [2021-10-20 05:20:01,154 INFO L226 Difference]: Without dead ends: 25 [2021-10-20 05:20:01,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-20 05:20:01,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-20 05:20:01,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 16. [2021-10-20 05:20:01,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:20:01,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-10-20 05:20:01,196 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 5 [2021-10-20 05:20:01,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:20:01,197 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-10-20 05:20:01,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:20:01,197 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-10-20 05:20:01,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-20 05:20:01,198 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:20:01,198 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-20 05:20:01,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-20 05:20:01,199 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:20:01,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:20:01,205 INFO L82 PathProgramCache]: Analyzing trace with hash 85187462, now seen corresponding path program 1 times [2021-10-20 05:20:01,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:20:01,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939252317] [2021-10-20 05:20:01,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:20:01,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:20:01,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:20:01,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:20:01,334 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:20:01,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939252317] [2021-10-20 05:20:01,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939252317] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:20:01,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:20:01,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-20 05:20:01,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240044605] [2021-10-20 05:20:01,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-20 05:20:01,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:20:01,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-20 05:20:01,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-20 05:20:01,338 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:20:01,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:20:01,375 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-10-20 05:20:01,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-20 05:20:01,376 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-20 05:20:01,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:20:01,377 INFO L225 Difference]: With dead ends: 20 [2021-10-20 05:20:01,377 INFO L226 Difference]: Without dead ends: 18 [2021-10-20 05:20:01,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-20 05:20:01,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-20 05:20:01,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-10-20 05:20:01,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 16 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:20:01,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-10-20 05:20:01,382 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 5 [2021-10-20 05:20:01,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:20:01,383 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-10-20 05:20:01,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:20:01,383 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-10-20 05:20:01,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-20 05:20:01,384 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:20:01,384 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:20:01,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-20 05:20:01,385 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:20:01,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:20:01,386 INFO L82 PathProgramCache]: Analyzing trace with hash -501164262, now seen corresponding path program 1 times [2021-10-20 05:20:01,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:20:01,386 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395640846] [2021-10-20 05:20:01,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:20:01,387 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:20:01,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-20 05:20:01,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-20 05:20:01,503 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-20 05:20:01,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395640846] [2021-10-20 05:20:01,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395640846] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-20 05:20:01,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-20 05:20:01,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-20 05:20:01,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524466674] [2021-10-20 05:20:01,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-20 05:20:01,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-20 05:20:01,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-20 05:20:01,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-20 05:20:01,506 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:20:01,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-20 05:20:01,635 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2021-10-20 05:20:01,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-20 05:20:01,636 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-20 05:20:01,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-20 05:20:01,637 INFO L225 Difference]: With dead ends: 27 [2021-10-20 05:20:01,637 INFO L226 Difference]: Without dead ends: 25 [2021-10-20 05:20:01,638 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 97.1ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-20 05:20:01,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-20 05:20:01,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2021-10-20 05:20:01,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:20:01,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-10-20 05:20:01,643 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 8 [2021-10-20 05:20:01,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-20 05:20:01,644 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-10-20 05:20:01,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-20 05:20:01,644 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-10-20 05:20:01,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-20 05:20:01,645 INFO L504 BasicCegarLoop]: Found error trace [2021-10-20 05:20:01,645 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-20 05:20:01,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-20 05:20:01,646 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-20 05:20:01,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-20 05:20:01,647 INFO L82 PathProgramCache]: Analyzing trace with hash -873319098, now seen corresponding path program 1 times [2021-10-20 05:20:01,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-20 05:20:01,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316439114] [2021-10-20 05:20:01,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-20 05:20:01,648 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-20 05:20:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-20 05:20:01,684 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-20 05:20:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-20 05:20:01,762 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-20 05:20:01,762 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-20 05:20:01,763 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 05:20:01,766 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 05:20:01,767 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-20 05:20:01,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-20 05:20:01,774 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-20 05:20:01,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 05:20:01 BoogieIcfgContainer [2021-10-20 05:20:01,808 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-20 05:20:01,811 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-20 05:20:01,811 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-20 05:20:01,811 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-20 05:20:01,812 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 05:20:00" (3/4) ... [2021-10-20 05:20:01,814 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-20 05:20:01,862 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a16b2e00-eb15-430d-ac50-082b442981f3/bin/utaipan-tZwUujhuQw/witness.graphml [2021-10-20 05:20:01,863 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-20 05:20:01,865 INFO L168 Benchmark]: Toolchain (without parser) took 1805.80 ms. Allocated memory was 98.6 MB in the beginning and 125.8 MB in the end (delta: 27.3 MB). Free memory was 68.6 MB in the beginning and 90.2 MB in the end (delta: -21.6 MB). Peak memory consumption was 3.2 MB. Max. memory is 16.1 GB. [2021-10-20 05:20:01,874 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 98.6 MB. Free memory is still 52.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:20:01,876 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.62 ms. Allocated memory was 98.6 MB in the beginning and 125.8 MB in the end (delta: 27.3 MB). Free memory was 68.4 MB in the beginning and 100.6 MB in the end (delta: -32.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-20 05:20:01,877 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.00 ms. Allocated memory is still 125.8 MB. Free memory was 100.6 MB in the beginning and 99.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 05:20:01,877 INFO L168 Benchmark]: Boogie Preprocessor took 21.89 ms. Allocated memory is still 125.8 MB. Free memory was 99.1 MB in the beginning and 98.1 MB in the end (delta: 964.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:20:01,878 INFO L168 Benchmark]: RCFGBuilder took 313.93 ms. Allocated memory is still 125.8 MB. Free memory was 98.1 MB in the beginning and 87.1 MB in the end (delta: 11.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-20 05:20:01,878 INFO L168 Benchmark]: TraceAbstraction took 1128.23 ms. Allocated memory is still 125.8 MB. Free memory was 86.5 MB in the beginning and 92.4 MB in the end (delta: -5.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-20 05:20:01,878 INFO L168 Benchmark]: Witness Printer took 52.05 ms. Allocated memory is still 125.8 MB. Free memory was 92.4 MB in the beginning and 90.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-20 05:20:01,881 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 98.6 MB. Free memory is still 52.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 248.62 ms. Allocated memory was 98.6 MB in the beginning and 125.8 MB in the end (delta: 27.3 MB). Free memory was 68.4 MB in the beginning and 100.6 MB in the end (delta: -32.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.00 ms. Allocated memory is still 125.8 MB. Free memory was 100.6 MB in the beginning and 99.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.89 ms. Allocated memory is still 125.8 MB. Free memory was 99.1 MB in the beginning and 98.1 MB in the end (delta: 964.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 313.93 ms. Allocated memory is still 125.8 MB. Free memory was 98.1 MB in the beginning and 87.1 MB in the end (delta: 11.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1128.23 ms. Allocated memory is still 125.8 MB. Free memory was 86.5 MB in the beginning and 92.4 MB in the end (delta: -5.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 52.05 ms. Allocated memory is still 125.8 MB. Free memory was 92.4 MB in the beginning and 90.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 11]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int i=0, x=0, y=0; [L20] int n=__VERIFIER_nondet_int(); [L21] COND FALSE !(!(n>0)) [L22] i=0 [L22] COND TRUE i