./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s2iff.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_5b8ef3a3-c317-4036-a02e-e7bdd6a8cfeb/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8ef3a3-c317-4036-a02e-e7bdd6a8cfeb/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_5b8ef3a3-c317-4036-a02e-e7bdd6a8cfeb/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8ef3a3-c317-4036-a02e-e7bdd6a8cfeb/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-fpi/s2iff.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8ef3a3-c317-4036-a02e-e7bdd6a8cfeb/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_5b8ef3a3-c317-4036-a02e-e7bdd6a8cfeb/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 a22ecd7dbca86ce676366b458aa720e60c3fd1ca ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:21:17,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:21:17,710 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:21:17,760 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:21:17,761 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:21:17,767 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:21:17,771 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:21:17,776 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:21:17,779 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:21:17,786 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:21:17,787 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:21:17,789 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:21:17,789 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:21:17,793 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:21:17,795 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:21:17,797 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:21:17,799 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:21:17,800 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:21:17,805 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:21:17,814 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:21:17,816 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:21:17,818 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:21:17,821 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:21:17,822 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:21:17,832 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:21:17,833 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:21:17,833 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:21:17,836 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:21:17,836 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:21:17,838 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:21:17,839 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:21:17,840 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:21:17,842 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:21:17,844 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:21:17,845 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:21:17,846 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:21:17,847 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:21:17,847 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:21:17,847 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:21:17,848 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:21:17,849 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:21:17,852 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8ef3a3-c317-4036-a02e-e7bdd6a8cfeb/bin/utaipan-WLngWcDbfI/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-11 02:21:17,898 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:21:17,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:21:17,900 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:21:17,900 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:21:17,900 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:21:17,900 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:21:17,901 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:21:17,901 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:21:17,907 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:21:17,908 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:21:17,908 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:21:17,909 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:21:17,909 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:21:17,909 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:21:17,910 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:21:17,910 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:21:17,911 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:21:17,911 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:21:17,911 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:21:17,911 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:21:17,911 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:21:17,912 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:21:17,912 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:21:17,912 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:21:17,912 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:21:17,913 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:21:17,913 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:21:17,913 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:21:17,913 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:21:17,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:21:17,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:21:17,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:21:17,917 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:21:17,917 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:21:17,917 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:21:17,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:21:17,918 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:21:17,918 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:21:17,918 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:21:17,918 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_5b8ef3a3-c317-4036-a02e-e7bdd6a8cfeb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8ef3a3-c317-4036-a02e-e7bdd6a8cfeb/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a22ecd7dbca86ce676366b458aa720e60c3fd1ca [2021-10-11 02:21:18,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:21:18,235 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:21:18,239 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:21:18,240 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:21:18,249 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:21:18,250 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8ef3a3-c317-4036-a02e-e7bdd6a8cfeb/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/array-fpi/s2iff.c [2021-10-11 02:21:18,331 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8ef3a3-c317-4036-a02e-e7bdd6a8cfeb/bin/utaipan-WLngWcDbfI/data/d0aba2b11/198cdcd144d34007871c0da2cb6603c4/FLAGb11655d54 [2021-10-11 02:21:18,837 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:21:18,838 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8ef3a3-c317-4036-a02e-e7bdd6a8cfeb/sv-benchmarks/c/array-fpi/s2iff.c [2021-10-11 02:21:18,846 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8ef3a3-c317-4036-a02e-e7bdd6a8cfeb/bin/utaipan-WLngWcDbfI/data/d0aba2b11/198cdcd144d34007871c0da2cb6603c4/FLAGb11655d54 [2021-10-11 02:21:19,204 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8ef3a3-c317-4036-a02e-e7bdd6a8cfeb/bin/utaipan-WLngWcDbfI/data/d0aba2b11/198cdcd144d34007871c0da2cb6603c4 [2021-10-11 02:21:19,208 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:21:19,211 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:21:19,216 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:21:19,216 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:21:19,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:21:19,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:21:19" (1/1) ... [2021-10-11 02:21:19,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a4ad2a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:19, skipping insertion in model container [2021-10-11 02:21:19,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:21:19" (1/1) ... [2021-10-11 02:21:19,234 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:21:19,254 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:21:19,526 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_5b8ef3a3-c317-4036-a02e-e7bdd6a8cfeb/sv-benchmarks/c/array-fpi/s2iff.c[588,601] [2021-10-11 02:21:19,567 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:21:19,579 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:21:19,595 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_5b8ef3a3-c317-4036-a02e-e7bdd6a8cfeb/sv-benchmarks/c/array-fpi/s2iff.c[588,601] [2021-10-11 02:21:19,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:21:19,646 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:21:19,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:19 WrapperNode [2021-10-11 02:21:19,648 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:21:19,649 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:21:19,649 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:21:19,650 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:21:19,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:19" (1/1) ... [2021-10-11 02:21:19,685 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:19" (1/1) ... [2021-10-11 02:21:19,704 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:21:19,705 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:21:19,705 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:21:19,706 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:21:19,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:19" (1/1) ... [2021-10-11 02:21:19,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:19" (1/1) ... [2021-10-11 02:21:19,719 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:19" (1/1) ... [2021-10-11 02:21:19,719 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:19" (1/1) ... [2021-10-11 02:21:19,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:19" (1/1) ... [2021-10-11 02:21:19,731 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:19" (1/1) ... [2021-10-11 02:21:19,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:19" (1/1) ... [2021-10-11 02:21:19,735 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:21:19,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:21:19,736 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:21:19,736 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:21:19,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:19" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8ef3a3-c317-4036-a02e-e7bdd6a8cfeb/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 02:21:19,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:21:19,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:21:19,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:21:19,819 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:21:19,819 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:21:19,819 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:21:19,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:21:19,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:21:20,284 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:21:20,284 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-11 02:21:20,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:21:20 BoogieIcfgContainer [2021-10-11 02:21:20,287 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:21:20,289 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:21:20,289 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:21:20,309 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:21:20,309 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:21:19" (1/3) ... [2021-10-11 02:21:20,310 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7facabec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:21:20, skipping insertion in model container [2021-10-11 02:21:20,310 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:21:19" (2/3) ... [2021-10-11 02:21:20,311 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7facabec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:21:20, skipping insertion in model container [2021-10-11 02:21:20,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:21:20" (3/3) ... [2021-10-11 02:21:20,312 INFO L111 eAbstractionObserver]: Analyzing ICFG s2iff.c [2021-10-11 02:21:20,331 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:21:20,334 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 02:21:20,362 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 02:21:20,410 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:21:20,410 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:21:20,411 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:21:20,411 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:21:20,411 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:21:20,411 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:21:20,411 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:21:20,412 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:21:20,427 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2021-10-11 02:21:20,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:21:20,434 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:20,435 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:21:20,435 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:21:20,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:20,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1591516051, now seen corresponding path program 1 times [2021-10-11 02:21:20,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:20,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005681656] [2021-10-11 02:21:20,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:20,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:20,762 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 02:21:20,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005681656] [2021-10-11 02:21:20,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:21:20,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:21:20,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612897576] [2021-10-11 02:21:20,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:21:20,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:20,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:21:20,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:21:20,793 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2021-10-11 02:21:20,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:20,870 INFO L93 Difference]: Finished difference Result 18 states and 23 transitions. [2021-10-11 02:21:20,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:21:20,872 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-10-11 02:21:20,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:20,881 INFO L225 Difference]: With dead ends: 18 [2021-10-11 02:21:20,882 INFO L226 Difference]: Without dead ends: 8 [2021-10-11 02:21:20,885 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 02:21:20,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-11 02:21:20,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-11 02:21:20,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-11 02:21:20,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-10-11 02:21:20,920 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-10-11 02:21:20,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:20,921 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-10-11 02:21:20,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:21:20,921 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-10-11 02:21:20,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:21:20,922 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:20,922 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:21:20,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:21:20,923 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:21:20,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:20,924 INFO L82 PathProgramCache]: Analyzing trace with hash -2098745102, now seen corresponding path program 1 times [2021-10-11 02:21:20,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:20,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958462995] [2021-10-11 02:21:20,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:20,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:21:20,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958462995] [2021-10-11 02:21:20,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:21:21,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:21:21,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868041558] [2021-10-11 02:21:21,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:21:21,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:21,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:21:21,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:21:21,029 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand 4 states. [2021-10-11 02:21:21,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:21,078 INFO L93 Difference]: Finished difference Result 12 states and 13 transitions. [2021-10-11 02:21:21,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:21:21,079 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-10-11 02:21:21,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:21,079 INFO L225 Difference]: With dead ends: 12 [2021-10-11 02:21:21,080 INFO L226 Difference]: Without dead ends: 9 [2021-10-11 02:21:21,081 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 02:21:21,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-11 02:21:21,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-11 02:21:21,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-11 02:21:21,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-10-11 02:21:21,085 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2021-10-11 02:21:21,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:21,085 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-11 02:21:21,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:21:21,085 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-10-11 02:21:21,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:21:21,086 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:21,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:21:21,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:21:21,087 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:21:21,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:21,088 INFO L82 PathProgramCache]: Analyzing trace with hash -636631016, now seen corresponding path program 1 times [2021-10-11 02:21:21,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:21,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941693001] [2021-10-11 02:21:21,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:21,109 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:21:21,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [19785606] [2021-10-11 02:21:21,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8ef3a3-c317-4036-a02e-e7bdd6a8cfeb/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 02:21:21,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:21:21,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-11 02:21:21,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:21:21,297 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-10-11 02:21:21,306 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:21:21,320 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:21:21,328 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-11 02:21:21,330 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-11 02:21:21,346 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:21:21,353 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:21:21,354 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:29, output treesize:21 [2021-10-11 02:21:21,414 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-10-11 02:21:21,423 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:21:21,440 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:21:21,445 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:21:21,446 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2021-10-11 02:21:21,611 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-10-11 02:21:21,614 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:21:21,626 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:21:21,633 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-10-11 02:21:21,634 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:25 [2021-10-11 02:21:21,731 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 02:21:21,737 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 02:21:21,740 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:21:21,749 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-10-11 02:21:21,752 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:21:21,759 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 02:21:21,764 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-10-11 02:21:21,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:21,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:21:21,837 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2021-10-11 02:21:31,317 WARN L197 SmtUtils]: Spent 8.18 s on a formula simplification that was a NOOP. DAG size: 43 [2021-10-11 02:21:31,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:31,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941693001] [2021-10-11 02:21:31,342 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:21:31,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19785606] [2021-10-11 02:21:31,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1320787152] [2021-10-11 02:21:31,365 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:21:31,366 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:21:31,371 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:21:31,377 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:21:31,378 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:21:31,528 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:21:31,867 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:21:34,817 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 159 [2021-10-11 02:21:35,027 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:21:35,263 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-10-11 02:21:35,487 WARN L197 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-10-11 02:21:35,537 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:21:35,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:21:35,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-11 02:21:35,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984839557] [2021-10-11 02:21:35,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-10-11 02:21:35,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:35,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-11 02:21:35,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=199, Unknown=1, NotChecked=0, Total=240 [2021-10-11 02:21:35,543 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 12 states. [2021-10-11 02:21:35,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:35,721 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-10-11 02:21:35,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:21:35,722 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 8 [2021-10-11 02:21:35,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:35,723 INFO L225 Difference]: With dead ends: 15 [2021-10-11 02:21:35,723 INFO L226 Difference]: Without dead ends: 12 [2021-10-11 02:21:35,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=46, Invalid=225, Unknown=1, NotChecked=0, Total=272 [2021-10-11 02:21:35,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-11 02:21:35,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-10-11 02:21:35,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-11 02:21:35,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2021-10-11 02:21:35,727 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2021-10-11 02:21:35,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:35,728 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2021-10-11 02:21:35,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-10-11 02:21:35,728 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2021-10-11 02:21:35,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:21:35,729 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:35,729 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:21:35,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-11 02:21:35,954 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:21:35,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:35,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1739232690, now seen corresponding path program 2 times [2021-10-11 02:21:35,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:35,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940432334] [2021-10-11 02:21:35,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:35,964 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:21:35,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734246442] [2021-10-11 02:21:35,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8ef3a3-c317-4036-a02e-e7bdd6a8cfeb/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 02:21:36,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-11 02:21:36,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:21:36,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:21:36,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:21:36,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:36,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:21:36,129 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:36,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940432334] [2021-10-11 02:21:36,130 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:21:36,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734246442] [2021-10-11 02:21:36,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1174909997] [2021-10-11 02:21:36,132 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:21:36,133 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:21:36,133 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:21:36,133 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:21:36,134 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:21:36,304 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:21:36,516 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:21:36,531 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:21:36,545 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:21:36,558 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:21:36,571 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:21:36,584 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:21:36,599 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:21:39,339 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:21:39,531 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-10-11 02:21:39,724 WARN L197 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-10-11 02:21:39,750 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:21:39,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:21:39,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-10-11 02:21:39,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742091554] [2021-10-11 02:21:39,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:21:39,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:39,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:21:39,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-10-11 02:21:39,753 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 8 states. [2021-10-11 02:21:39,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:39,852 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2021-10-11 02:21:39,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 02:21:39,852 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2021-10-11 02:21:39,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:39,853 INFO L225 Difference]: With dead ends: 20 [2021-10-11 02:21:39,853 INFO L226 Difference]: Without dead ends: 14 [2021-10-11 02:21:39,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-10-11 02:21:39,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-11 02:21:39,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 10. [2021-10-11 02:21:39,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-11 02:21:39,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-10-11 02:21:39,857 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 9 [2021-10-11 02:21:39,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:39,858 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-10-11 02:21:39,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:21:39,858 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-10-11 02:21:39,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:21:39,859 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:39,859 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:21:40,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:21:40,074 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:21:40,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:40,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1542522717, now seen corresponding path program 3 times [2021-10-11 02:21:40,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:40,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450375098] [2021-10-11 02:21:40,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:40,110 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:21:40,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963985407] [2021-10-11 02:21:40,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8ef3a3-c317-4036-a02e-e7bdd6a8cfeb/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:21:40,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 02:21:40,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:21:40,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 02:21:40,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:21:40,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:40,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:21:40,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:21:40,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450375098] [2021-10-11 02:21:40,288 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:21:40,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963985407] [2021-10-11 02:21:40,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1623218149] [2021-10-11 02:21:40,292 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:21:40,292 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:21:40,293 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:21:40,293 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:21:40,293 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:21:40,469 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:21:43,588 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:21:43,758 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-10-11 02:21:43,975 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2021-10-11 02:21:44,007 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:21:44,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 02:21:44,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-10-11 02:21:44,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528691781] [2021-10-11 02:21:44,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-10-11 02:21:44,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:21:44,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-11 02:21:44,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:21:44,010 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 9 states. [2021-10-11 02:21:44,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:21:44,133 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-10-11 02:21:44,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 02:21:44,135 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2021-10-11 02:21:44,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:21:44,135 INFO L225 Difference]: With dead ends: 14 [2021-10-11 02:21:44,136 INFO L226 Difference]: Without dead ends: 11 [2021-10-11 02:21:44,136 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-10-11 02:21:44,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-11 02:21:44,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-11 02:21:44,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-11 02:21:44,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-11 02:21:44,140 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2021-10-11 02:21:44,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:21:44,140 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-11 02:21:44,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-10-11 02:21:44,140 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-10-11 02:21:44,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:21:44,141 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:21:44,141 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-11 02:21:44,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-10-11 02:21:44,342 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 02:21:44,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:21:44,344 INFO L82 PathProgramCache]: Analyzing trace with hash 573521677, now seen corresponding path program 4 times [2021-10-11 02:21:44,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:21:44,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796159935] [2021-10-11 02:21:44,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:21:44,378 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-11 02:21:44,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374963485] [2021-10-11 02:21:44,384 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8ef3a3-c317-4036-a02e-e7bdd6a8cfeb/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:21:44,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:21:44,446 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:21:44,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:21:44,473 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:21:44,528 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:21:44,528 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:21:44,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:21:44,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:21:44 BoogieIcfgContainer [2021-10-11 02:21:44,770 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:21:44,771 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:21:44,771 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:21:44,771 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:21:44,772 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:21:20" (3/4) ... [2021-10-11 02:21:44,774 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:21:44,824 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5b8ef3a3-c317-4036-a02e-e7bdd6a8cfeb/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:21:44,824 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:21:44,825 INFO L168 Benchmark]: Toolchain (without parser) took 25614.04 ms. Allocated memory was 121.6 MB in the beginning and 218.1 MB in the end (delta: 96.5 MB). Free memory was 98.2 MB in the beginning and 144.0 MB in the end (delta: -45.8 MB). Peak memory consumption was 49.0 MB. Max. memory is 16.1 GB. [2021-10-11 02:21:44,826 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 121.6 MB. Free memory is still 78.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:21:44,826 INFO L168 Benchmark]: CACSL2BoogieTranslator took 432.67 ms. Allocated memory is still 121.6 MB. Free memory was 98.2 MB in the beginning and 96.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:21:44,827 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.19 ms. Allocated memory is still 121.6 MB. Free memory was 96.4 MB in the beginning and 94.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:21:44,827 INFO L168 Benchmark]: Boogie Preprocessor took 30.04 ms. Allocated memory is still 121.6 MB. Free memory was 94.8 MB in the beginning and 93.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:21:44,827 INFO L168 Benchmark]: RCFGBuilder took 551.17 ms. Allocated memory is still 121.6 MB. Free memory was 93.6 MB in the beginning and 69.6 MB in the end (delta: 24.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:21:44,828 INFO L168 Benchmark]: TraceAbstraction took 24481.78 ms. Allocated memory was 121.6 MB in the beginning and 218.1 MB in the end (delta: 96.5 MB). Free memory was 69.1 MB in the beginning and 147.1 MB in the end (delta: -78.0 MB). Peak memory consumption was 21.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:21:44,828 INFO L168 Benchmark]: Witness Printer took 53.41 ms. Allocated memory is still 218.1 MB. Free memory was 146.1 MB in the beginning and 144.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:21:44,831 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 121.6 MB. Free memory is still 78.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 432.67 ms. Allocated memory is still 121.6 MB. Free memory was 98.2 MB in the beginning and 96.4 MB in the end (delta: 1.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 55.19 ms. Allocated memory is still 121.6 MB. Free memory was 96.4 MB in the beginning and 94.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.04 ms. Allocated memory is still 121.6 MB. Free memory was 94.8 MB in the beginning and 93.6 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 551.17 ms. Allocated memory is still 121.6 MB. Free memory was 93.6 MB in the beginning and 69.6 MB in the end (delta: 24.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 24481.78 ms. Allocated memory was 121.6 MB in the beginning and 218.1 MB in the end (delta: 96.5 MB). Free memory was 69.1 MB in the beginning and 147.1 MB in the end (delta: -78.0 MB). Peak memory consumption was 21.4 MB. Max. memory is 16.1 GB. * Witness Printer took 53.41 ms. Allocated memory is still 218.1 MB. Free memory was 146.1 MB in the beginning and 144.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 VAL [N=2] [L32] COND TRUE i