./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem01_label12.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b95a03-7535-410c-93ae-4302f62ed30e/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b95a03-7535-410c-93ae-4302f62ed30e/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_85b95a03-7535-410c-93ae-4302f62ed30e/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b95a03-7535-410c-93ae-4302f62ed30e/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem01_label12.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b95a03-7535-410c-93ae-4302f62ed30e/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_85b95a03-7535-410c-93ae-4302f62ed30e/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 74057909fb6c276d17d8009abfa8a9d3a5bed6a1 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:23:49,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:23:49,749 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:23:49,782 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:23:49,783 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:23:49,784 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:23:49,786 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:23:49,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:23:49,791 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:23:49,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:23:49,793 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:23:49,794 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:23:49,795 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:23:49,796 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:23:49,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:23:49,798 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:23:49,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:23:49,801 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:23:49,803 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:23:49,805 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:23:49,807 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:23:49,808 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:23:49,810 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:23:49,811 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:23:49,814 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:23:49,815 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:23:49,815 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:23:49,816 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:23:49,817 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:23:49,818 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:23:49,818 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:23:49,819 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:23:49,820 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:23:49,826 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:23:49,827 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:23:49,828 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:23:49,830 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:23:49,831 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:23:49,831 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:23:49,832 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:23:49,833 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:23:49,834 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b95a03-7535-410c-93ae-4302f62ed30e/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:23:49,875 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:23:49,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:23:49,876 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:23:49,877 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:23:49,877 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:23:49,877 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:23:49,878 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:23:49,878 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:23:49,878 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:23:49,878 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:23:49,879 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:23:49,879 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:23:49,879 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:23:49,879 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:23:49,880 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:23:49,880 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:23:49,881 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:23:49,881 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:23:49,881 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:23:49,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:23:49,882 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:23:49,882 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:23:49,882 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:23:49,882 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:23:49,883 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:23:49,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:23:49,883 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:23:49,883 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:23:49,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:23:49,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:23:49,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:23:49,885 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:23:49,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:23:49,885 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:23:49,885 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:23:49,886 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:23:49,886 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:23:49,886 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:23:49,886 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:23:49,887 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_85b95a03-7535-410c-93ae-4302f62ed30e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b95a03-7535-410c-93ae-4302f62ed30e/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74057909fb6c276d17d8009abfa8a9d3a5bed6a1 [2021-10-11 02:23:50,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:23:50,176 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:23:50,179 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:23:50,180 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:23:50,181 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:23:50,182 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b95a03-7535-410c-93ae-4302f62ed30e/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/eca-rers2012/Problem01_label12.c [2021-10-11 02:23:50,243 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b95a03-7535-410c-93ae-4302f62ed30e/bin/utaipan-WLngWcDbfI/data/df25a13a0/fce0717186284960a2b8e00c1139a8c4/FLAG722cd1387 [2021-10-11 02:23:50,843 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:23:50,843 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b95a03-7535-410c-93ae-4302f62ed30e/sv-benchmarks/c/eca-rers2012/Problem01_label12.c [2021-10-11 02:23:50,859 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b95a03-7535-410c-93ae-4302f62ed30e/bin/utaipan-WLngWcDbfI/data/df25a13a0/fce0717186284960a2b8e00c1139a8c4/FLAG722cd1387 [2021-10-11 02:23:51,101 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b95a03-7535-410c-93ae-4302f62ed30e/bin/utaipan-WLngWcDbfI/data/df25a13a0/fce0717186284960a2b8e00c1139a8c4 [2021-10-11 02:23:51,104 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:23:51,106 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:23:51,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:23:51,112 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:23:51,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:23:51,118 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:23:51" (1/1) ... [2021-10-11 02:23:51,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44868529 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:51, skipping insertion in model container [2021-10-11 02:23:51,125 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:23:51" (1/1) ... [2021-10-11 02:23:51,132 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:23:51,218 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:23:51,618 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_85b95a03-7535-410c-93ae-4302f62ed30e/sv-benchmarks/c/eca-rers2012/Problem01_label12.c[20469,20482] [2021-10-11 02:23:51,661 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:23:51,669 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:23:51,770 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_85b95a03-7535-410c-93ae-4302f62ed30e/sv-benchmarks/c/eca-rers2012/Problem01_label12.c[20469,20482] [2021-10-11 02:23:51,779 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:23:51,800 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:23:51,807 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:51 WrapperNode [2021-10-11 02:23:51,807 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:23:51,808 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:23:51,808 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:23:51,809 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:23:51,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:51" (1/1) ... [2021-10-11 02:23:51,848 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:51" (1/1) ... [2021-10-11 02:23:51,905 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:23:51,906 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:23:51,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:23:51,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:23:51,915 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:51" (1/1) ... [2021-10-11 02:23:51,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:51" (1/1) ... [2021-10-11 02:23:51,920 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:51" (1/1) ... [2021-10-11 02:23:51,921 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:51" (1/1) ... [2021-10-11 02:23:51,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:51" (1/1) ... [2021-10-11 02:23:51,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:51" (1/1) ... [2021-10-11 02:23:51,967 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:51" (1/1) ... [2021-10-11 02:23:51,974 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:23:51,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:23:51,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:23:51,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:23:51,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:51" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b95a03-7535-410c-93ae-4302f62ed30e/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 02:23:52,112 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:23:52,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:23:52,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:23:52,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:23:54,091 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:23:54,092 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-11 02:23:54,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:54 BoogieIcfgContainer [2021-10-11 02:23:54,096 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:23:54,098 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:23:54,099 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:23:54,102 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:23:54,102 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:23:51" (1/3) ... [2021-10-11 02:23:54,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11512f7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:23:54, skipping insertion in model container [2021-10-11 02:23:54,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:51" (2/3) ... [2021-10-11 02:23:54,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11512f7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:23:54, skipping insertion in model container [2021-10-11 02:23:54,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:54" (3/3) ... [2021-10-11 02:23:54,105 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem01_label12.c [2021-10-11 02:23:54,123 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:23:54,127 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:23:54,138 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:23:54,175 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:23:54,175 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:23:54,176 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:23:54,176 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:23:54,176 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:23:54,177 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:23:54,177 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:23:54,177 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:23:54,193 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2021-10-11 02:23:54,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-11 02:23:54,202 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:54,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:54,204 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:54,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:54,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1806906968, now seen corresponding path program 1 times [2021-10-11 02:23:54,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:54,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434165977] [2021-10-11 02:23:54,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:54,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:54,701 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 02:23:54,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434165977] [2021-10-11 02:23:54,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:54,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:23:54,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592798128] [2021-10-11 02:23:54,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:23:54,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:54,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:23:54,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:23:54,724 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2021-10-11 02:23:55,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:55,274 INFO L93 Difference]: Finished difference Result 224 states and 428 transitions. [2021-10-11 02:23:55,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:23:55,276 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2021-10-11 02:23:55,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:55,303 INFO L225 Difference]: With dead ends: 224 [2021-10-11 02:23:55,303 INFO L226 Difference]: Without dead ends: 145 [2021-10-11 02:23:55,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:23:55,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-11 02:23:55,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2021-10-11 02:23:55,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2021-10-11 02:23:55,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 259 transitions. [2021-10-11 02:23:55,386 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 259 transitions. Word has length 71 [2021-10-11 02:23:55,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:55,387 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 259 transitions. [2021-10-11 02:23:55,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:23:55,388 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 259 transitions. [2021-10-11 02:23:55,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-11 02:23:55,394 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:55,394 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:55,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:23:55,394 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:55,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:55,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1034851461, now seen corresponding path program 1 times [2021-10-11 02:23:55,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:55,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438579754] [2021-10-11 02:23:55,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:55,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:55,483 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:55,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438579754] [2021-10-11 02:23:55,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:55,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:23:55,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674843186] [2021-10-11 02:23:55,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:23:55,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:55,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:23:55,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:23:55,491 INFO L87 Difference]: Start difference. First operand 145 states and 259 transitions. Second operand 3 states. [2021-10-11 02:23:55,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:55,955 INFO L93 Difference]: Finished difference Result 431 states and 774 transitions. [2021-10-11 02:23:55,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:23:55,956 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 77 [2021-10-11 02:23:55,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:55,959 INFO L225 Difference]: With dead ends: 431 [2021-10-11 02:23:55,959 INFO L226 Difference]: Without dead ends: 287 [2021-10-11 02:23:55,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:23:55,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-10-11 02:23:55,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2021-10-11 02:23:55,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2021-10-11 02:23:55,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 468 transitions. [2021-10-11 02:23:55,978 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 468 transitions. Word has length 77 [2021-10-11 02:23:55,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:55,979 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 468 transitions. [2021-10-11 02:23:55,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:23:55,979 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 468 transitions. [2021-10-11 02:23:55,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-10-11 02:23:55,982 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:55,982 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:55,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:23:55,983 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:55,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:55,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1703772103, now seen corresponding path program 1 times [2021-10-11 02:23:55,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:55,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65071848] [2021-10-11 02:23:55,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:56,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:56,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:56,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65071848] [2021-10-11 02:23:56,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:56,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:23:56,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679821342] [2021-10-11 02:23:56,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:23:56,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:56,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:23:56,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:23:56,236 INFO L87 Difference]: Start difference. First operand 287 states and 468 transitions. Second operand 4 states. [2021-10-11 02:23:56,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:56,820 INFO L93 Difference]: Finished difference Result 784 states and 1255 transitions. [2021-10-11 02:23:56,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:23:56,821 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2021-10-11 02:23:56,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:56,824 INFO L225 Difference]: With dead ends: 784 [2021-10-11 02:23:56,824 INFO L226 Difference]: Without dead ends: 429 [2021-10-11 02:23:56,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:23:56,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-10-11 02:23:56,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 429. [2021-10-11 02:23:56,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 429 states. [2021-10-11 02:23:56,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 557 transitions. [2021-10-11 02:23:56,851 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 557 transitions. Word has length 78 [2021-10-11 02:23:56,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:56,851 INFO L481 AbstractCegarLoop]: Abstraction has 429 states and 557 transitions. [2021-10-11 02:23:56,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:23:56,852 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 557 transitions. [2021-10-11 02:23:56,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-10-11 02:23:56,855 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:56,856 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:56,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:23:56,856 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:56,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:56,857 INFO L82 PathProgramCache]: Analyzing trace with hash -494775986, now seen corresponding path program 1 times [2021-10-11 02:23:56,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:56,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761433271] [2021-10-11 02:23:56,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:56,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:56,917 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:56,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761433271] [2021-10-11 02:23:56,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:56,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:23:56,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313176928] [2021-10-11 02:23:56,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:23:56,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:56,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:23:56,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:23:56,919 INFO L87 Difference]: Start difference. First operand 429 states and 557 transitions. Second operand 4 states. [2021-10-11 02:23:57,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:57,367 INFO L93 Difference]: Finished difference Result 999 states and 1360 transitions. [2021-10-11 02:23:57,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:23:57,378 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2021-10-11 02:23:57,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:57,382 INFO L225 Difference]: With dead ends: 999 [2021-10-11 02:23:57,382 INFO L226 Difference]: Without dead ends: 642 [2021-10-11 02:23:57,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:23:57,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-10-11 02:23:57,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 571. [2021-10-11 02:23:57,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2021-10-11 02:23:57,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 776 transitions. [2021-10-11 02:23:57,426 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 776 transitions. Word has length 83 [2021-10-11 02:23:57,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:57,426 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 776 transitions. [2021-10-11 02:23:57,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:23:57,427 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 776 transitions. [2021-10-11 02:23:57,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-11 02:23:57,429 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:57,429 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:57,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 02:23:57,430 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:57,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:57,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1470700581, now seen corresponding path program 1 times [2021-10-11 02:23:57,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:57,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335911289] [2021-10-11 02:23:57,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:57,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:57,520 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-11 02:23:57,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335911289] [2021-10-11 02:23:57,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:57,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:23:57,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828621941] [2021-10-11 02:23:57,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:23:57,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:57,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:23:57,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:23:57,528 INFO L87 Difference]: Start difference. First operand 571 states and 776 transitions. Second operand 3 states. [2021-10-11 02:23:57,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:57,844 INFO L93 Difference]: Finished difference Result 1496 states and 1996 transitions. [2021-10-11 02:23:57,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:23:57,845 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2021-10-11 02:23:57,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:57,850 INFO L225 Difference]: With dead ends: 1496 [2021-10-11 02:23:57,850 INFO L226 Difference]: Without dead ends: 926 [2021-10-11 02:23:57,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:23:57,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-10-11 02:23:57,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 713. [2021-10-11 02:23:57,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2021-10-11 02:23:57,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 954 transitions. [2021-10-11 02:23:57,876 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 954 transitions. Word has length 95 [2021-10-11 02:23:57,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:57,876 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 954 transitions. [2021-10-11 02:23:57,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:23:57,877 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 954 transitions. [2021-10-11 02:23:57,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-10-11 02:23:57,879 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:57,879 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:57,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-11 02:23:57,880 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:57,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:57,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1745917258, now seen corresponding path program 1 times [2021-10-11 02:23:57,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:57,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414606155] [2021-10-11 02:23:57,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:57,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:57,947 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:57,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414606155] [2021-10-11 02:23:57,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:57,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:23:57,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780279758] [2021-10-11 02:23:57,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:23:57,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:57,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:23:57,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:23:57,950 INFO L87 Difference]: Start difference. First operand 713 states and 954 transitions. Second operand 4 states. [2021-10-11 02:23:58,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:58,473 INFO L93 Difference]: Finished difference Result 1638 states and 2226 transitions. [2021-10-11 02:23:58,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:23:58,476 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 101 [2021-10-11 02:23:58,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:58,482 INFO L225 Difference]: With dead ends: 1638 [2021-10-11 02:23:58,482 INFO L226 Difference]: Without dead ends: 926 [2021-10-11 02:23:58,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:23:58,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-10-11 02:23:58,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 713. [2021-10-11 02:23:58,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 713 states. [2021-10-11 02:23:58,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 948 transitions. [2021-10-11 02:23:58,517 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 948 transitions. Word has length 101 [2021-10-11 02:23:58,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:58,519 INFO L481 AbstractCegarLoop]: Abstraction has 713 states and 948 transitions. [2021-10-11 02:23:58,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:23:58,519 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 948 transitions. [2021-10-11 02:23:58,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-10-11 02:23:58,522 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:58,522 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:58,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-11 02:23:58,523 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:58,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:58,524 INFO L82 PathProgramCache]: Analyzing trace with hash -656955571, now seen corresponding path program 1 times [2021-10-11 02:23:58,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:58,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091178388] [2021-10-11 02:23:58,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:58,675 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-11 02:23:58,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091178388] [2021-10-11 02:23:58,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:58,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:23:58,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698949857] [2021-10-11 02:23:58,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:23:58,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:58,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:23:58,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:23:58,678 INFO L87 Difference]: Start difference. First operand 713 states and 948 transitions. Second operand 4 states. [2021-10-11 02:23:59,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:59,191 INFO L93 Difference]: Finished difference Result 1638 states and 2154 transitions. [2021-10-11 02:23:59,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:23:59,192 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2021-10-11 02:23:59,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:59,200 INFO L225 Difference]: With dead ends: 1638 [2021-10-11 02:23:59,200 INFO L226 Difference]: Without dead ends: 926 [2021-10-11 02:23:59,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:23:59,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-10-11 02:23:59,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 855. [2021-10-11 02:23:59,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 855 states. [2021-10-11 02:23:59,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1109 transitions. [2021-10-11 02:23:59,228 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1109 transitions. Word has length 115 [2021-10-11 02:23:59,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:59,228 INFO L481 AbstractCegarLoop]: Abstraction has 855 states and 1109 transitions. [2021-10-11 02:23:59,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:23:59,228 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1109 transitions. [2021-10-11 02:23:59,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-10-11 02:23:59,233 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:59,233 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:59,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-11 02:23:59,234 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:59,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:59,234 INFO L82 PathProgramCache]: Analyzing trace with hash 905971240, now seen corresponding path program 1 times [2021-10-11 02:23:59,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:59,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553336703] [2021-10-11 02:23:59,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:59,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:59,409 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-11 02:23:59,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553336703] [2021-10-11 02:23:59,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:59,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:23:59,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740762008] [2021-10-11 02:23:59,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:23:59,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:59,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:23:59,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:23:59,412 INFO L87 Difference]: Start difference. First operand 855 states and 1109 transitions. Second operand 3 states. [2021-10-11 02:23:59,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:59,742 INFO L93 Difference]: Finished difference Result 1922 states and 2468 transitions. [2021-10-11 02:23:59,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:23:59,744 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2021-10-11 02:23:59,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:59,750 INFO L225 Difference]: With dead ends: 1922 [2021-10-11 02:23:59,751 INFO L226 Difference]: Without dead ends: 1068 [2021-10-11 02:23:59,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:23:59,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2021-10-11 02:23:59,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 926. [2021-10-11 02:23:59,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 926 states. [2021-10-11 02:23:59,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 1201 transitions. [2021-10-11 02:23:59,781 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 1201 transitions. Word has length 132 [2021-10-11 02:23:59,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:59,783 INFO L481 AbstractCegarLoop]: Abstraction has 926 states and 1201 transitions. [2021-10-11 02:23:59,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:23:59,783 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 1201 transitions. [2021-10-11 02:23:59,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-10-11 02:23:59,786 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:59,786 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:59,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-11 02:23:59,787 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:23:59,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:59,787 INFO L82 PathProgramCache]: Analyzing trace with hash -1422756918, now seen corresponding path program 1 times [2021-10-11 02:23:59,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:59,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141659154] [2021-10-11 02:23:59,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:59,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:59,922 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-11 02:23:59,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141659154] [2021-10-11 02:23:59,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:59,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:23:59,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835923463] [2021-10-11 02:23:59,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:23:59,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:59,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:23:59,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:23:59,929 INFO L87 Difference]: Start difference. First operand 926 states and 1201 transitions. Second operand 3 states. [2021-10-11 02:24:00,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:24:00,271 INFO L93 Difference]: Finished difference Result 2064 states and 2658 transitions. [2021-10-11 02:24:00,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:24:00,271 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 175 [2021-10-11 02:24:00,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:24:00,278 INFO L225 Difference]: With dead ends: 2064 [2021-10-11 02:24:00,278 INFO L226 Difference]: Without dead ends: 1139 [2021-10-11 02:24:00,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:24:00,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2021-10-11 02:24:00,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 1068. [2021-10-11 02:24:00,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1068 states. [2021-10-11 02:24:00,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1068 states to 1068 states and 1357 transitions. [2021-10-11 02:24:00,310 INFO L78 Accepts]: Start accepts. Automaton has 1068 states and 1357 transitions. Word has length 175 [2021-10-11 02:24:00,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:24:00,310 INFO L481 AbstractCegarLoop]: Abstraction has 1068 states and 1357 transitions. [2021-10-11 02:24:00,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:24:00,311 INFO L276 IsEmpty]: Start isEmpty. Operand 1068 states and 1357 transitions. [2021-10-11 02:24:00,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-10-11 02:24:00,314 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:00,315 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:24:00,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-11 02:24:00,315 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:00,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:00,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1489449673, now seen corresponding path program 1 times [2021-10-11 02:24:00,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:24:00,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280979096] [2021-10-11 02:24:00,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:24:00,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:00,520 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 159 proven. 35 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-10-11 02:24:00,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280979096] [2021-10-11 02:24:00,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111643750] [2021-10-11 02:24:00,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b95a03-7535-410c-93ae-4302f62ed30e/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 02:24:00,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:00,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:24:00,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:01,066 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-11 02:24:01,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:24:01,349 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-10-11 02:24:01,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:24:01,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2021-10-11 02:24:01,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740418219] [2021-10-11 02:24:01,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:24:01,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:24:01,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:24:01,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:24:01,352 INFO L87 Difference]: Start difference. First operand 1068 states and 1357 transitions. Second operand 3 states. [2021-10-11 02:24:01,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:24:01,718 INFO L93 Difference]: Finished difference Result 2561 states and 3277 transitions. [2021-10-11 02:24:01,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:24:01,718 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 188 [2021-10-11 02:24:01,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:24:01,729 INFO L225 Difference]: With dead ends: 2561 [2021-10-11 02:24:01,729 INFO L226 Difference]: Without dead ends: 1494 [2021-10-11 02:24:01,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 373 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:24:01,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2021-10-11 02:24:01,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1281. [2021-10-11 02:24:01,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1281 states. [2021-10-11 02:24:01,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1281 states to 1281 states and 1649 transitions. [2021-10-11 02:24:01,772 INFO L78 Accepts]: Start accepts. Automaton has 1281 states and 1649 transitions. Word has length 188 [2021-10-11 02:24:01,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:24:01,773 INFO L481 AbstractCegarLoop]: Abstraction has 1281 states and 1649 transitions. [2021-10-11 02:24:01,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:24:01,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1281 states and 1649 transitions. [2021-10-11 02:24:01,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-10-11 02:24:01,777 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:01,777 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:24:01,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-11 02:24:01,994 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:01,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:01,994 INFO L82 PathProgramCache]: Analyzing trace with hash 922668897, now seen corresponding path program 1 times [2021-10-11 02:24:01,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:24:01,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838059525] [2021-10-11 02:24:01,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:24:02,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-10-11 02:24:02,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838059525] [2021-10-11 02:24:02,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:24:02,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:24:02,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509770783] [2021-10-11 02:24:02,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:24:02,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:24:02,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:24:02,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:24:02,173 INFO L87 Difference]: Start difference. First operand 1281 states and 1649 transitions. Second operand 3 states. [2021-10-11 02:24:02,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:24:02,594 INFO L93 Difference]: Finished difference Result 2845 states and 3645 transitions. [2021-10-11 02:24:02,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:24:02,595 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 197 [2021-10-11 02:24:02,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:24:02,603 INFO L225 Difference]: With dead ends: 2845 [2021-10-11 02:24:02,603 INFO L226 Difference]: Without dead ends: 1352 [2021-10-11 02:24:02,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:24:02,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2021-10-11 02:24:02,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1210. [2021-10-11 02:24:02,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2021-10-11 02:24:02,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1495 transitions. [2021-10-11 02:24:02,646 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1495 transitions. Word has length 197 [2021-10-11 02:24:02,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:24:02,647 INFO L481 AbstractCegarLoop]: Abstraction has 1210 states and 1495 transitions. [2021-10-11 02:24:02,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:24:02,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1495 transitions. [2021-10-11 02:24:02,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-10-11 02:24:02,652 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:24:02,652 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:24:02,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-10-11 02:24:02,653 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:24:02,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:24:02,653 INFO L82 PathProgramCache]: Analyzing trace with hash 236748877, now seen corresponding path program 1 times [2021-10-11 02:24:02,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:24:02,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894464893] [2021-10-11 02:24:02,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:24:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:03,009 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 143 proven. 86 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-10-11 02:24:03,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894464893] [2021-10-11 02:24:03,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329501637] [2021-10-11 02:24:03,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b95a03-7535-410c-93ae-4302f62ed30e/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 02:24:03,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:24:03,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-11 02:24:03,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:24:03,411 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-10-11 02:24:03,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:24:03,642 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-10-11 02:24:03,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:24:03,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2021-10-11 02:24:03,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24199884] [2021-10-11 02:24:03,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:24:03,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:24:03,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:24:03,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:24:03,645 INFO L87 Difference]: Start difference. First operand 1210 states and 1495 transitions. Second operand 3 states. [2021-10-11 02:24:03,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:24:03,996 INFO L93 Difference]: Finished difference Result 2488 states and 3080 transitions. [2021-10-11 02:24:03,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:24:03,997 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 216 [2021-10-11 02:24:03,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:24:03,998 INFO L225 Difference]: With dead ends: 2488 [2021-10-11 02:24:03,998 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:24:04,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 430 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:24:04,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:24:04,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:24:04,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:24:04,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:24:04,001 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 216 [2021-10-11 02:24:04,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:24:04,002 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:24:04,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:24:04,002 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:24:04,002 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:24:04,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-11 02:24:04,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 02:24:04,555 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2021-10-11 02:24:04,737 WARN L197 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 35 [2021-10-11 02:24:04,740 INFO L262 CegarLoopResult]: For program point L102(lines 102 400) no Hoare annotation was computed. [2021-10-11 02:24:04,740 INFO L262 CegarLoopResult]: For program point L598(line 598) no Hoare annotation was computed. [2021-10-11 02:24:04,740 INFO L262 CegarLoopResult]: For program point L334(lines 334 400) no Hoare annotation was computed. [2021-10-11 02:24:04,740 INFO L262 CegarLoopResult]: For program point L302(lines 302 400) no Hoare annotation was computed. [2021-10-11 02:24:04,740 INFO L262 CegarLoopResult]: For program point L170(lines 170 400) no Hoare annotation was computed. [2021-10-11 02:24:04,740 INFO L262 CegarLoopResult]: For program point L204(lines 204 400) no Hoare annotation was computed. [2021-10-11 02:24:04,741 INFO L262 CegarLoopResult]: For program point L72(lines 72 400) no Hoare annotation was computed. [2021-10-11 02:24:04,741 INFO L262 CegarLoopResult]: For program point L271(lines 271 400) no Hoare annotation was computed. [2021-10-11 02:24:04,741 INFO L262 CegarLoopResult]: For program point L139(lines 139 400) no Hoare annotation was computed. [2021-10-11 02:24:04,741 INFO L262 CegarLoopResult]: For program point L371(lines 371 400) no Hoare annotation was computed. [2021-10-11 02:24:04,741 INFO L262 CegarLoopResult]: For program point L107(lines 107 400) no Hoare annotation was computed. [2021-10-11 02:24:04,741 INFO L262 CegarLoopResult]: For program point L41(lines 41 400) no Hoare annotation was computed. [2021-10-11 02:24:04,742 INFO L262 CegarLoopResult]: For program point L339(lines 339 400) no Hoare annotation was computed. [2021-10-11 02:24:04,743 INFO L262 CegarLoopResult]: For program point L207(lines 207 400) no Hoare annotation was computed. [2021-10-11 02:24:04,743 INFO L262 CegarLoopResult]: For program point L75(lines 75 400) no Hoare annotation was computed. [2021-10-11 02:24:04,743 INFO L262 CegarLoopResult]: For program point L373(lines 373 400) no Hoare annotation was computed. [2021-10-11 02:24:04,743 INFO L262 CegarLoopResult]: For program point L241(lines 241 400) no Hoare annotation was computed. [2021-10-11 02:24:04,743 INFO L262 CegarLoopResult]: For program point L175(lines 175 400) no Hoare annotation was computed. [2021-10-11 02:24:04,743 INFO L262 CegarLoopResult]: For program point L275(lines 275 400) no Hoare annotation was computed. [2021-10-11 02:24:04,744 INFO L262 CegarLoopResult]: For program point L375(lines 375 400) no Hoare annotation was computed. [2021-10-11 02:24:04,744 INFO L262 CegarLoopResult]: For program point L309(lines 309 400) no Hoare annotation was computed. [2021-10-11 02:24:04,744 INFO L262 CegarLoopResult]: For program point L45(lines 45 400) no Hoare annotation was computed. [2021-10-11 02:24:04,744 INFO L262 CegarLoopResult]: For program point L343(lines 343 400) no Hoare annotation was computed. [2021-10-11 02:24:04,744 INFO L262 CegarLoopResult]: For program point L112(lines 112 400) no Hoare annotation was computed. [2021-10-11 02:24:04,744 INFO L262 CegarLoopResult]: For program point L542-1(lines 40 585) no Hoare annotation was computed. [2021-10-11 02:24:04,746 INFO L262 CegarLoopResult]: For program point L278(lines 278 400) no Hoare annotation was computed. [2021-10-11 02:24:04,746 INFO L262 CegarLoopResult]: For program point L146(lines 146 400) no Hoare annotation was computed. [2021-10-11 02:24:04,746 INFO L262 CegarLoopResult]: For program point L213(lines 213 400) no Hoare annotation was computed. [2021-10-11 02:24:04,746 INFO L262 CegarLoopResult]: For program point L82(lines 82 400) no Hoare annotation was computed. [2021-10-11 02:24:04,746 INFO L262 CegarLoopResult]: For program point L545-1(lines 40 585) no Hoare annotation was computed. [2021-10-11 02:24:04,746 INFO L262 CegarLoopResult]: For program point L347(lines 347 400) no Hoare annotation was computed. [2021-10-11 02:24:04,746 INFO L262 CegarLoopResult]: For program point L248(lines 248 400) no Hoare annotation was computed. [2021-10-11 02:24:04,746 INFO L262 CegarLoopResult]: For program point L546(line 546) no Hoare annotation was computed. [2021-10-11 02:24:04,747 INFO L262 CegarLoopResult]: For program point L183(lines 183 400) no Hoare annotation was computed. [2021-10-11 02:24:04,747 INFO L262 CegarLoopResult]: For program point L150(lines 150 400) no Hoare annotation was computed. [2021-10-11 02:24:04,747 INFO L262 CegarLoopResult]: For program point L382(lines 382 400) no Hoare annotation was computed. [2021-10-11 02:24:04,747 INFO L262 CegarLoopResult]: For program point L316(lines 316 400) no Hoare annotation was computed. [2021-10-11 02:24:04,747 INFO L262 CegarLoopResult]: For program point L283(lines 283 400) no Hoare annotation was computed. [2021-10-11 02:24:04,747 INFO L262 CegarLoopResult]: For program point L118(lines 118 400) no Hoare annotation was computed. [2021-10-11 02:24:04,747 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 02:24:04,748 INFO L262 CegarLoopResult]: For program point L218(lines 218 400) no Hoare annotation was computed. [2021-10-11 02:24:04,748 INFO L262 CegarLoopResult]: For program point L53(lines 53 400) no Hoare annotation was computed. [2021-10-11 02:24:04,748 INFO L262 CegarLoopResult]: For program point L154(lines 154 400) no Hoare annotation was computed. [2021-10-11 02:24:04,750 INFO L258 CegarLoopResult]: At program point L584(lines 40 585) the Hoare annotation is: (let ((.cse0 (= ~a16~0 6)) (.cse3 (<= 15 ~a8~0)) (.cse2 (not (= ~a7~0 1))) (.cse7 (= ~a17~0 1)) (.cse4 (<= ~a16~0 5)) (.cse1 (<= ~a17~0 0)) (.cse6 (= ~a20~0 1)) (.cse5 (<= ~a8~0 13))) (or (and .cse0 .cse1 .cse2 .cse3) (and .cse4 .cse2 .cse5) (and .cse1 .cse6) (and .cse0 .cse2 .cse3 .cse7) (and .cse4 .cse2 .cse3 .cse7) (and (= ~a21~0 1) (= ~a12~0 8) .cse6 .cse2 .cse7) (and .cse4 .cse7 .cse5) (and .cse4 .cse1) (and .cse6 .cse5))) [2021-10-11 02:24:04,750 INFO L262 CegarLoopResult]: For program point L188(lines 188 400) no Hoare annotation was computed. [2021-10-11 02:24:04,750 INFO L262 CegarLoopResult]: For program point L387(lines 387 400) no Hoare annotation was computed. [2021-10-11 02:24:04,750 INFO L262 CegarLoopResult]: For program point L288(lines 288 400) no Hoare annotation was computed. [2021-10-11 02:24:04,750 INFO L262 CegarLoopResult]: For program point L255(lines 255 400) no Hoare annotation was computed. [2021-10-11 02:24:04,751 INFO L262 CegarLoopResult]: For program point L90(lines 90 400) no Hoare annotation was computed. [2021-10-11 02:24:04,751 INFO L262 CegarLoopResult]: For program point L355(lines 355 400) no Hoare annotation was computed. [2021-10-11 02:24:04,751 INFO L262 CegarLoopResult]: For program point L322(lines 322 400) no Hoare annotation was computed. [2021-10-11 02:24:04,751 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 02:24:04,751 INFO L262 CegarLoopResult]: For program point L124(lines 124 400) no Hoare annotation was computed. [2021-10-11 02:24:04,751 INFO L265 CegarLoopResult]: At program point L587(lines 587 604) the Hoare annotation is: true [2021-10-11 02:24:04,751 INFO L262 CegarLoopResult]: For program point L224(lines 224 400) no Hoare annotation was computed. [2021-10-11 02:24:04,751 INFO L262 CegarLoopResult]: For program point L158(lines 158 400) no Hoare annotation was computed. [2021-10-11 02:24:04,752 INFO L262 CegarLoopResult]: For program point L59(lines 59 400) no Hoare annotation was computed. [2021-10-11 02:24:04,752 INFO L262 CegarLoopResult]: For program point L94(lines 94 400) no Hoare annotation was computed. [2021-10-11 02:24:04,752 INFO L262 CegarLoopResult]: For program point L392(lines 392 400) no Hoare annotation was computed. [2021-10-11 02:24:04,752 INFO L262 CegarLoopResult]: For program point L326(lines 326 400) no Hoare annotation was computed. [2021-10-11 02:24:04,752 INFO L262 CegarLoopResult]: For program point L260(lines 260 400) no Hoare annotation was computed. [2021-10-11 02:24:04,752 INFO L262 CegarLoopResult]: For program point L228(lines 228 400) no Hoare annotation was computed. [2021-10-11 02:24:04,752 INFO L262 CegarLoopResult]: For program point L162(lines 162 400) no Hoare annotation was computed. [2021-10-11 02:24:04,752 INFO L262 CegarLoopResult]: For program point L129(lines 129 400) no Hoare annotation was computed. [2021-10-11 02:24:04,753 INFO L262 CegarLoopResult]: For program point L328(lines 328 400) no Hoare annotation was computed. [2021-10-11 02:24:04,753 INFO L262 CegarLoopResult]: For program point L196(lines 196 400) no Hoare annotation was computed. [2021-10-11 02:24:04,753 INFO L262 CegarLoopResult]: For program point L64(lines 64 400) no Hoare annotation was computed. [2021-10-11 02:24:04,753 INFO L258 CegarLoopResult]: At program point L593-2(lines 593 603) the Hoare annotation is: (let ((.cse0 (= ~a16~0 6)) (.cse3 (<= 15 ~a8~0)) (.cse2 (not (= ~a7~0 1))) (.cse7 (= ~a17~0 1)) (.cse4 (<= ~a16~0 5)) (.cse1 (<= ~a17~0 0)) (.cse6 (= ~a20~0 1)) (.cse5 (<= ~a8~0 13))) (or (and .cse0 .cse1 .cse2 .cse3) (and .cse4 .cse2 .cse5) (and .cse1 .cse6) (and .cse0 .cse2 .cse3 .cse7) (and .cse4 .cse2 .cse3 .cse7) (and (= ~a21~0 1) (= ~a12~0 8) .cse6 .cse2 .cse7) (and .cse4 .cse7 .cse5) (and .cse4 .cse1) (and .cse6 .cse5))) [2021-10-11 02:24:04,753 INFO L262 CegarLoopResult]: For program point L296(lines 296 400) no Hoare annotation was computed. [2021-10-11 02:24:04,754 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 546) no Hoare annotation was computed. [2021-10-11 02:24:04,754 INFO L262 CegarLoopResult]: For program point L363(lines 363 400) no Hoare annotation was computed. [2021-10-11 02:24:04,754 INFO L262 CegarLoopResult]: For program point L199(lines 199 400) no Hoare annotation was computed. [2021-10-11 02:24:04,754 INFO L262 CegarLoopResult]: For program point L365(lines 365 400) no Hoare annotation was computed. [2021-10-11 02:24:04,754 INFO L262 CegarLoopResult]: For program point L266(lines 266 400) no Hoare annotation was computed. [2021-10-11 02:24:04,755 INFO L262 CegarLoopResult]: For program point L233(lines 233 400) no Hoare annotation was computed. [2021-10-11 02:24:04,755 INFO L262 CegarLoopResult]: For program point L134(lines 134 400) no Hoare annotation was computed. [2021-10-11 02:24:04,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:24:04 BoogieIcfgContainer [2021-10-11 02:24:04,800 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:24:04,801 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:24:04,801 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:24:04,801 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:24:04,802 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:54" (3/4) ... [2021-10-11 02:24:04,805 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:24:04,834 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 103 nodes and edges [2021-10-11 02:24:04,836 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2021-10-11 02:24:04,837 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2021-10-11 02:24:04,839 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-11 02:24:05,001 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_85b95a03-7535-410c-93ae-4302f62ed30e/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:24:05,001 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:24:05,002 INFO L168 Benchmark]: Toolchain (without parser) took 13895.19 ms. Allocated memory was 86.0 MB in the beginning and 341.8 MB in the end (delta: 255.9 MB). Free memory was 45.2 MB in the beginning and 296.8 MB in the end (delta: -251.6 MB). Peak memory consumption was 191.6 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:05,002 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 86.0 MB. Free memory is still 63.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:24:05,003 INFO L168 Benchmark]: CACSL2BoogieTranslator took 695.29 ms. Allocated memory is still 86.0 MB. Free memory was 45.0 MB in the beginning and 44.1 MB in the end (delta: 884.3 kB). Peak memory consumption was 4.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:05,003 INFO L168 Benchmark]: Boogie Procedure Inliner took 97.39 ms. Allocated memory is still 86.0 MB. Free memory was 44.1 MB in the beginning and 38.4 MB in the end (delta: 5.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:05,004 INFO L168 Benchmark]: Boogie Preprocessor took 83.14 ms. Allocated memory was 86.0 MB in the beginning and 113.2 MB in the end (delta: 27.3 MB). Free memory was 38.4 MB in the beginning and 85.9 MB in the end (delta: -47.4 MB). Peak memory consumption was 11.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:05,004 INFO L168 Benchmark]: RCFGBuilder took 2106.24 ms. Allocated memory was 113.2 MB in the beginning and 157.3 MB in the end (delta: 44.0 MB). Free memory was 85.8 MB in the beginning and 117.3 MB in the end (delta: -31.5 MB). Peak memory consumption was 70.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:05,005 INFO L168 Benchmark]: TraceAbstraction took 10702.35 ms. Allocated memory was 157.3 MB in the beginning and 341.8 MB in the end (delta: 184.5 MB). Free memory was 116.3 MB in the beginning and 112.4 MB in the end (delta: 3.9 MB). Peak memory consumption was 187.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:05,005 INFO L168 Benchmark]: Witness Printer took 200.26 ms. Allocated memory is still 341.8 MB. Free memory was 112.4 MB in the beginning and 296.8 MB in the end (delta: -184.4 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. [2021-10-11 02:24:05,007 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 86.0 MB. Free memory is still 63.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 695.29 ms. Allocated memory is still 86.0 MB. Free memory was 45.0 MB in the beginning and 44.1 MB in the end (delta: 884.3 kB). Peak memory consumption was 4.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 97.39 ms. Allocated memory is still 86.0 MB. Free memory was 44.1 MB in the beginning and 38.4 MB in the end (delta: 5.7 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 83.14 ms. Allocated memory was 86.0 MB in the beginning and 113.2 MB in the end (delta: 27.3 MB). Free memory was 38.4 MB in the beginning and 85.9 MB in the end (delta: -47.4 MB). Peak memory consumption was 11.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 2106.24 ms. Allocated memory was 113.2 MB in the beginning and 157.3 MB in the end (delta: 44.0 MB). Free memory was 85.8 MB in the beginning and 117.3 MB in the end (delta: -31.5 MB). Peak memory consumption was 70.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10702.35 ms. Allocated memory was 157.3 MB in the beginning and 341.8 MB in the end (delta: 184.5 MB). Free memory was 116.3 MB in the beginning and 112.4 MB in the end (delta: 3.9 MB). Peak memory consumption was 187.4 MB. Max. memory is 16.1 GB. * Witness Printer took 200.26 ms. Allocated memory is still 341.8 MB. Free memory was 112.4 MB in the beginning and 296.8 MB in the end (delta: -184.4 MB). Peak memory consumption was 4.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 546]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: ((((((((((a16 == 6 && a17 <= 0) && !(a7 == 1)) && 15 <= a8) || ((a16 <= 5 && !(a7 == 1)) && a8 <= 13)) || (a17 <= 0 && a20 == 1)) || (((a16 == 6 && !(a7 == 1)) && 15 <= a8) && a17 == 1)) || (((a16 <= 5 && !(a7 == 1)) && 15 <= a8) && a17 == 1)) || ((((a21 == 1 && a12 == 8) && a20 == 1) && !(a7 == 1)) && a17 == 1)) || ((a16 <= 5 && a17 == 1) && a8 <= 13)) || (a16 <= 5 && a17 <= 0)) || (a20 == 1 && a8 <= 13) - InvariantResult [Line: 587]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 593]: Loop Invariant Derived loop invariant: ((((((((((a16 == 6 && a17 <= 0) && !(a7 == 1)) && 15 <= a8) || ((a16 <= 5 && !(a7 == 1)) && a8 <= 13)) || (a17 <= 0 && a20 == 1)) || (((a16 == 6 && !(a7 == 1)) && 15 <= a8) && a17 == 1)) || (((a16 <= 5 && !(a7 == 1)) && 15 <= a8) && a17 == 1)) || ((((a21 == 1 && a12 == 8) && a20 == 1) && !(a7 == 1)) && a17 == 1)) || ((a16 <= 5 && a17 == 1) && a8 <= 13)) || (a16 <= 5 && a17 <= 0)) || (a20 == 1 && a8 <= 13) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 76 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.0s, OverallIterations: 12, TraceHistogramMax: 6, AutomataDifference: 5.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 578 SDtfs, 962 SDslu, 57 SDs, 0 SdLazy, 2767 SolverSat, 693 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 843 GetRequests, 818 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1281occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 12 MinimizatonAttempts, 1136 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 49 NumberOfFragments, 205 HoareAnnotationTreeSize, 3 FomulaSimplifications, 7740 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 3 FomulaSimplificationsInter, 756 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 1932 NumberOfCodeBlocks, 1932 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 2320 ConstructedInterpolants, 0 QuantifiedInterpolants, 1363809 SizeOfPredicates, 0 NumberOfNonLiveVariables, 937 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 16 InterpolantComputations, 14 PerfectInterpolantSequences, 2023/2144 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...