./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/sum01_bug02.i --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_cc863e8b-d166-4cda-92ca-fe0f7941f282/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc863e8b-d166-4cda-92ca-fe0f7941f282/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_cc863e8b-d166-4cda-92ca-fe0f7941f282/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc863e8b-d166-4cda-92ca-fe0f7941f282/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/sum01_bug02.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc863e8b-d166-4cda-92ca-fe0f7941f282/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_cc863e8b-d166-4cda-92ca-fe0f7941f282/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 67768b34e7b9299b4c0862a201d7fe793c7261b3 .............................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 02:27:48,696 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:27:48,698 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:27:48,741 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:27:48,742 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:27:48,744 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:27:48,746 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:27:48,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:27:48,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:27:48,753 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:27:48,754 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:27:48,756 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:27:48,757 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:27:48,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:27:48,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:27:48,762 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:27:48,763 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:27:48,765 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:27:48,768 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:27:48,771 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:27:48,773 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:27:48,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:27:48,787 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:27:48,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:27:48,793 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:27:48,801 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:27:48,801 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:27:48,803 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:27:48,803 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:27:48,805 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:27:48,805 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:27:48,807 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:27:48,810 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:27:48,811 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:27:48,813 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:27:48,814 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:27:48,815 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:27:48,816 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:27:48,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:27:48,818 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:27:48,819 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:27:48,822 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc863e8b-d166-4cda-92ca-fe0f7941f282/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:27:48,868 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:27:48,868 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:27:48,870 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:27:48,871 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:27:48,871 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:27:48,872 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:27:48,872 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:27:48,873 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:27:48,873 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:27:48,873 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:27:48,875 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:27:48,875 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:27:48,875 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:27:48,876 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:27:48,876 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:27:48,877 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:27:48,877 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:27:48,877 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:27:48,878 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:27:48,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:27:48,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:27:48,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:27:48,879 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:27:48,879 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:27:48,879 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:27:48,879 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:27:48,880 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:27:48,880 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:27:48,880 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:27:48,881 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:27:48,881 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:27:48,881 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:27:48,882 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:27:48,882 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:27:48,882 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:27:48,882 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:27:48,883 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:27:48,883 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:27:48,883 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:27:48,883 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_cc863e8b-d166-4cda-92ca-fe0f7941f282/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc863e8b-d166-4cda-92ca-fe0f7941f282/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 67768b34e7b9299b4c0862a201d7fe793c7261b3 [2021-10-11 02:27:49,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:27:49,175 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:27:49,178 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:27:49,179 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:27:49,180 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:27:49,181 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc863e8b-d166-4cda-92ca-fe0f7941f282/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/loops/sum01_bug02.i [2021-10-11 02:27:49,258 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc863e8b-d166-4cda-92ca-fe0f7941f282/bin/utaipan-WLngWcDbfI/data/62388d6d4/0ef598d740574377b8278955d7a7f454/FLAG84b3acc71 [2021-10-11 02:27:49,734 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:27:49,735 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc863e8b-d166-4cda-92ca-fe0f7941f282/sv-benchmarks/c/loops/sum01_bug02.i [2021-10-11 02:27:49,742 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc863e8b-d166-4cda-92ca-fe0f7941f282/bin/utaipan-WLngWcDbfI/data/62388d6d4/0ef598d740574377b8278955d7a7f454/FLAG84b3acc71 [2021-10-11 02:27:50,131 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc863e8b-d166-4cda-92ca-fe0f7941f282/bin/utaipan-WLngWcDbfI/data/62388d6d4/0ef598d740574377b8278955d7a7f454 [2021-10-11 02:27:50,134 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:27:50,136 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:27:50,142 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:27:50,143 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:27:50,147 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:27:50,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:27:50" (1/1) ... [2021-10-11 02:27:50,157 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e16009f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:50, skipping insertion in model container [2021-10-11 02:27:50,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:27:50" (1/1) ... [2021-10-11 02:27:50,167 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:27:50,191 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:27:50,371 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_cc863e8b-d166-4cda-92ca-fe0f7941f282/sv-benchmarks/c/loops/sum01_bug02.i[812,825] [2021-10-11 02:27:50,380 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:27:50,388 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:27:50,398 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_cc863e8b-d166-4cda-92ca-fe0f7941f282/sv-benchmarks/c/loops/sum01_bug02.i[812,825] [2021-10-11 02:27:50,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:27:50,412 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:27:50,412 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:50 WrapperNode [2021-10-11 02:27:50,412 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:27:50,414 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:27:50,414 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:27:50,414 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:27:50,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:50" (1/1) ... [2021-10-11 02:27:50,425 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:50" (1/1) ... [2021-10-11 02:27:50,439 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:27:50,439 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:27:50,439 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:27:50,440 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:27:50,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:50" (1/1) ... [2021-10-11 02:27:50,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:50" (1/1) ... [2021-10-11 02:27:50,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:50" (1/1) ... [2021-10-11 02:27:50,450 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:50" (1/1) ... [2021-10-11 02:27:50,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:50" (1/1) ... [2021-10-11 02:27:50,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:50" (1/1) ... [2021-10-11 02:27:50,458 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:50" (1/1) ... [2021-10-11 02:27:50,460 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:27:50,461 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:27:50,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:27:50,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:27:50,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:50" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc863e8b-d166-4cda-92ca-fe0f7941f282/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 02:27:50,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:27:50,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:27:50,537 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:27:50,537 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:27:50,770 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:27:50,770 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-11 02:27:50,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:50 BoogieIcfgContainer [2021-10-11 02:27:50,773 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:27:50,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:27:50,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:27:50,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:27:50,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:27:50" (1/3) ... [2021-10-11 02:27:50,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7029a0e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:27:50, skipping insertion in model container [2021-10-11 02:27:50,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:27:50" (2/3) ... [2021-10-11 02:27:50,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7029a0e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:27:50, skipping insertion in model container [2021-10-11 02:27:50,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:50" (3/3) ... [2021-10-11 02:27:50,781 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02.i [2021-10-11 02:27:50,796 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:27:50,799 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:27:50,812 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:27:50,837 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:27:50,838 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:27:50,838 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:27:50,838 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:27:50,838 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:27:50,838 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:27:50,838 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:27:50,839 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:27:50,853 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2021-10-11 02:27:50,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:27:50,858 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:50,859 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:27:50,860 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:27:50,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:50,866 INFO L82 PathProgramCache]: Analyzing trace with hash 2066023, now seen corresponding path program 1 times [2021-10-11 02:27:50,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:50,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230679692] [2021-10-11 02:27:50,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:51,152 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 02:27:51,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230679692] [2021-10-11 02:27:51,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:27:51,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:27:51,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309456338] [2021-10-11 02:27:51,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:27:51,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:51,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:27:51,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:27:51,184 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 4 states. [2021-10-11 02:27:51,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:51,233 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2021-10-11 02:27:51,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:27:51,235 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2021-10-11 02:27:51,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:51,243 INFO L225 Difference]: With dead ends: 15 [2021-10-11 02:27:51,244 INFO L226 Difference]: Without dead ends: 6 [2021-10-11 02:27:51,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:27:51,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-10-11 02:27:51,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-10-11 02:27:51,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-11 02:27:51,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-10-11 02:27:51,281 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2021-10-11 02:27:51,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:51,282 INFO L481 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-10-11 02:27:51,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:27:51,282 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-10-11 02:27:51,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:27:51,283 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:51,283 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 02:27:51,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:27:51,283 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:27:51,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:51,285 INFO L82 PathProgramCache]: Analyzing trace with hash 64150467, now seen corresponding path program 1 times [2021-10-11 02:27:51,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:51,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279611925] [2021-10-11 02:27:51,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:51,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:51,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279611925] [2021-10-11 02:27:51,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52089624] [2021-10-11 02:27:51,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc863e8b-d166-4cda-92ca-fe0f7941f282/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 02:27:51,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:51,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-11 02:27:51,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:27:51,683 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:27:51,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:51,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:27:51,796 INFO L398 QuantifierPusher]: Applying distributivity to a DISJUNCTION[3, 2, 2, 1] term [2021-10-11 02:27:51,796 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-10-11 02:27:51,800 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-10-11 02:27:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:51,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [251653461] [2021-10-11 02:27:51,915 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-10-11 02:27:51,916 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:27:51,930 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:27:51,939 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:27:51,940 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:27:52,483 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:27:52,636 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-10-11 02:27:52,845 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:27:52,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:27:52,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-10-11 02:27:52,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624533855] [2021-10-11 02:27:52,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-10-11 02:27:52,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:52,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-11 02:27:52,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:27:52,849 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 10 states. [2021-10-11 02:27:53,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:53,026 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-10-11 02:27:53,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:27:53,026 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 5 [2021-10-11 02:27:53,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:53,027 INFO L225 Difference]: With dead ends: 12 [2021-10-11 02:27:53,027 INFO L226 Difference]: Without dead ends: 8 [2021-10-11 02:27:53,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-10-11 02:27:53,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-11 02:27:53,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-11 02:27:53,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-11 02:27:53,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-10-11 02:27:53,032 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2021-10-11 02:27:53,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:53,032 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-10-11 02:27:53,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-10-11 02:27:53,033 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-10-11 02:27:53,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:27:53,033 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:53,033 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1] [2021-10-11 02:27:53,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-11 02:27:53,254 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:27:53,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:53,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1522376771, now seen corresponding path program 2 times [2021-10-11 02:27:53,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:53,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002789458] [2021-10-11 02:27:53,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:53,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:27:53,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:53,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002789458] [2021-10-11 02:27:53,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503171171] [2021-10-11 02:27:53,478 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_cc863e8b-d166-4cda-92ca-fe0f7941f282/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 02:27:53,535 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-11 02:27:53,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:27:53,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-11 02:27:53,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:27:53,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:53,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:27:54,308 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 40 [2021-10-11 02:27:54,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:27:54,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [764385751] [2021-10-11 02:27:54,313 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-10-11 02:27:54,313 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:27:54,313 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:27:54,314 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:27:54,314 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:27:54,532 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:27:54,693 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-10-11 02:27:54,940 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2021-10-11 02:27:54,941 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:27:54,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:27:54,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2021-10-11 02:27:54,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551203520] [2021-10-11 02:27:54,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-10-11 02:27:54,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:27:54,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-11 02:27:54,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-10-11 02:27:54,945 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 15 states. [2021-10-11 02:27:55,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:27:55,420 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-10-11 02:27:55,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-11 02:27:55,422 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 7 [2021-10-11 02:27:55,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:27:55,422 INFO L225 Difference]: With dead ends: 16 [2021-10-11 02:27:55,422 INFO L226 Difference]: Without dead ends: 11 [2021-10-11 02:27:55,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-10-11 02:27:55,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-11 02:27:55,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-11 02:27:55,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-11 02:27:55,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-10-11 02:27:55,426 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2021-10-11 02:27:55,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:27:55,426 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-10-11 02:27:55,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-10-11 02:27:55,427 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-10-11 02:27:55,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:27:55,429 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:27:55,429 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1] [2021-10-11 02:27:55,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-11 02:27:55,630 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:27:55,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:27:55,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1625233177, now seen corresponding path program 3 times [2021-10-11 02:27:55,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:27:55,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098605111] [2021-10-11 02:27:55,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:27:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:27:55,679 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:27:55,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:27:55,726 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:27:55,766 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:27:55,766 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:27:55,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-10-11 02:27:55,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:27:55 BoogieIcfgContainer [2021-10-11 02:27:55,806 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:27:55,806 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:27:55,807 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:27:55,807 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:27:55,808 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:27:50" (3/4) ... [2021-10-11 02:27:55,810 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:27:55,894 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc863e8b-d166-4cda-92ca-fe0f7941f282/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:27:55,894 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:27:55,895 INFO L168 Benchmark]: Toolchain (without parser) took 5759.08 ms. Allocated memory was 98.6 MB in the beginning and 144.7 MB in the end (delta: 46.1 MB). Free memory was 65.8 MB in the beginning and 93.0 MB in the end (delta: -27.2 MB). Peak memory consumption was 19.0 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:55,896 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 98.6 MB. Free memory was 52.3 MB in the beginning and 52.2 MB in the end (delta: 77.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:27:55,896 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.38 ms. Allocated memory is still 98.6 MB. Free memory was 65.6 MB in the beginning and 74.3 MB in the end (delta: -8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:55,897 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.14 ms. Allocated memory is still 98.6 MB. Free memory was 74.3 MB in the beginning and 73.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:55,897 INFO L168 Benchmark]: Boogie Preprocessor took 21.00 ms. Allocated memory is still 98.6 MB. Free memory was 73.0 MB in the beginning and 72.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:27:55,897 INFO L168 Benchmark]: RCFGBuilder took 311.70 ms. Allocated memory is still 98.6 MB. Free memory was 72.0 MB in the beginning and 56.8 MB in the end (delta: 15.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:55,898 INFO L168 Benchmark]: TraceAbstraction took 5031.77 ms. Allocated memory was 98.6 MB in the beginning and 144.7 MB in the end (delta: 46.1 MB). Free memory was 56.1 MB in the beginning and 95.1 MB in the end (delta: -38.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:55,898 INFO L168 Benchmark]: Witness Printer took 87.75 ms. Allocated memory is still 144.7 MB. Free memory was 95.1 MB in the beginning and 93.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:27:55,901 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 98.6 MB. Free memory was 52.3 MB in the beginning and 52.2 MB in the end (delta: 77.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 270.38 ms. Allocated memory is still 98.6 MB. Free memory was 65.6 MB in the beginning and 74.3 MB in the end (delta: -8.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 25.14 ms. Allocated memory is still 98.6 MB. Free memory was 74.3 MB in the beginning and 73.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.00 ms. Allocated memory is still 98.6 MB. Free memory was 73.0 MB in the beginning and 72.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 311.70 ms. Allocated memory is still 98.6 MB. Free memory was 72.0 MB in the beginning and 56.8 MB in the end (delta: 15.1 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5031.77 ms. Allocated memory was 98.6 MB in the beginning and 144.7 MB in the end (delta: 46.1 MB). Free memory was 56.1 MB in the beginning and 95.1 MB in the end (delta: -38.9 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. * Witness Printer took 87.75 ms. Allocated memory is still 144.7 MB. Free memory was 95.1 MB in the beginning and 93.0 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: - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, j=10, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 [L24] COND TRUE i<=n [L25] COND TRUE i