./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/skippedu.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a4e575-6051-4fcd-9829-5a349a440574/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a4e575-6051-4fcd-9829-5a349a440574/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a4e575-6051-4fcd-9829-5a349a440574/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a4e575-6051-4fcd-9829-5a349a440574/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/skippedu.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a4e575-6051-4fcd-9829-5a349a440574/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a4e575-6051-4fcd-9829-5a349a440574/bin/utaipan-Q6hlc19bkW --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 578aa1ed819483237cae7cb7b17bc18e9dfff9e081f63e5821fc4a918d7ba90e --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 14:23:57,809 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:23:57,812 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:23:57,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:23:57,859 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:23:57,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:23:57,865 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:23:57,869 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:23:57,871 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:23:57,877 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:23:57,879 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:23:57,881 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:23:57,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:23:57,884 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:23:57,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:23:57,889 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:23:57,891 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:23:57,892 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:23:57,894 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:23:57,901 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:23:57,903 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:23:57,906 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:23:57,907 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:23:57,909 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:23:57,918 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:23:57,920 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:23:57,920 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:23:57,922 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:23:57,923 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:23:57,925 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:23:57,925 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:23:57,926 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:23:57,929 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:23:57,930 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:23:57,931 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:23:57,932 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:23:57,932 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:23:57,933 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:23:57,933 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:23:57,935 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:23:57,936 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:23:57,937 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a4e575-6051-4fcd-9829-5a349a440574/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:23:57,977 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:23:57,978 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:23:57,979 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:23:57,979 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:23:57,980 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:23:57,980 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:23:57,980 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:23:57,981 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:23:57,981 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:23:57,981 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:23:57,982 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:23:57,983 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:23:57,983 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:23:57,983 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:23:57,983 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:23:57,984 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:23:57,984 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:23:57,984 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:23:57,985 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:23:57,985 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:23:57,985 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:23:57,986 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:23:57,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:23:57,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:23:57,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:23:57,986 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:23:57,987 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:23:57,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:23:57,988 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:23:57,988 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:23:57,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:23:57,989 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:23:57,989 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:23:57,989 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:23:57,989 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:23:57,990 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:23:57,990 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:23:57,990 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:23:57,990 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:23:57,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:23:57,991 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:23:57,991 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_d0a4e575-6051-4fcd-9829-5a349a440574/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a4e575-6051-4fcd-9829-5a349a440574/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 578aa1ed819483237cae7cb7b17bc18e9dfff9e081f63e5821fc4a918d7ba90e [2022-11-23 14:23:58,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:23:58,356 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:23:58,359 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:23:58,360 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:23:58,361 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:23:58,362 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a4e575-6051-4fcd-9829-5a349a440574/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/array-tiling/skippedu.c [2022-11-23 14:24:01,550 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:24:01,810 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:24:01,810 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a4e575-6051-4fcd-9829-5a349a440574/sv-benchmarks/c/array-tiling/skippedu.c [2022-11-23 14:24:01,817 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a4e575-6051-4fcd-9829-5a349a440574/bin/utaipan-Q6hlc19bkW/data/17ae89eea/3bab29923ca34330a3a9ba11a4fbe421/FLAG545864a6f [2022-11-23 14:24:01,838 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a4e575-6051-4fcd-9829-5a349a440574/bin/utaipan-Q6hlc19bkW/data/17ae89eea/3bab29923ca34330a3a9ba11a4fbe421 [2022-11-23 14:24:01,841 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:24:01,844 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:24:01,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:24:01,848 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:24:01,852 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:24:01,852 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:24:01" (1/1) ... [2022-11-23 14:24:01,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c0f8cd6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:01, skipping insertion in model container [2022-11-23 14:24:01,854 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:24:01" (1/1) ... [2022-11-23 14:24:01,862 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:24:01,884 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:24:02,077 WARN L237 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_d0a4e575-6051-4fcd-9829-5a349a440574/sv-benchmarks/c/array-tiling/skippedu.c[399,412] [2022-11-23 14:24:02,097 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:24:02,107 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:24:02,117 WARN L237 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_d0a4e575-6051-4fcd-9829-5a349a440574/sv-benchmarks/c/array-tiling/skippedu.c[399,412] [2022-11-23 14:24:02,124 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:24:02,138 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:24:02,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:02 WrapperNode [2022-11-23 14:24:02,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:24:02,140 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:24:02,140 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:24:02,140 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:24:02,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:02" (1/1) ... [2022-11-23 14:24:02,155 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:02" (1/1) ... [2022-11-23 14:24:02,176 INFO L138 Inliner]: procedures = 16, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2022-11-23 14:24:02,176 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:24:02,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:24:02,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:24:02,177 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:24:02,187 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:02" (1/1) ... [2022-11-23 14:24:02,187 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:02" (1/1) ... [2022-11-23 14:24:02,189 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:02" (1/1) ... [2022-11-23 14:24:02,189 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:02" (1/1) ... [2022-11-23 14:24:02,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:02" (1/1) ... [2022-11-23 14:24:02,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:02" (1/1) ... [2022-11-23 14:24:02,200 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:02" (1/1) ... [2022-11-23 14:24:02,201 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:02" (1/1) ... [2022-11-23 14:24:02,203 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:24:02,204 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:24:02,204 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:24:02,205 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:24:02,205 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:02" (1/1) ... [2022-11-23 14:24:02,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:24:02,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a4e575-6051-4fcd-9829-5a349a440574/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:24:02,238 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a4e575-6051-4fcd-9829-5a349a440574/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:24:02,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a4e575-6051-4fcd-9829-5a349a440574/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:24:02,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:24:02,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:24:02,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:24:02,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-23 14:24:02,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:24:02,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:24:02,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:24:02,391 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:24:02,395 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:24:02,565 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:24:02,626 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:24:02,627 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-23 14:24:02,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:24:02 BoogieIcfgContainer [2022-11-23 14:24:02,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:24:02,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:24:02,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:24:02,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:24:02,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:24:01" (1/3) ... [2022-11-23 14:24:02,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b1fa70a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:24:02, skipping insertion in model container [2022-11-23 14:24:02,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:24:02" (2/3) ... [2022-11-23 14:24:02,638 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b1fa70a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:24:02, skipping insertion in model container [2022-11-23 14:24:02,638 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:24:02" (3/3) ... [2022-11-23 14:24:02,639 INFO L112 eAbstractionObserver]: Analyzing ICFG skippedu.c [2022-11-23 14:24:02,657 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:24:02,657 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:24:02,709 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:24:02,716 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@121b7d60, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:24:02,716 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:24:02,721 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:24:02,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 14:24:02,727 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:24:02,728 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:24:02,729 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:24:02,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:24:02,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1867790854, now seen corresponding path program 1 times [2022-11-23 14:24:02,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:24:02,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978519236] [2022-11-23 14:24:02,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:02,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:24:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:03,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:24:03,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:24:03,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978519236] [2022-11-23 14:24:03,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978519236] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:24:03,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:24:03,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:24:03,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226559326] [2022-11-23 14:24:03,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:24:03,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:24:03,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:24:03,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:24:03,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:24:03,186 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:24:03,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:24:03,290 INFO L93 Difference]: Finished difference Result 24 states and 33 transitions. [2022-11-23 14:24:03,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:24:03,295 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 14:24:03,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:24:03,304 INFO L225 Difference]: With dead ends: 24 [2022-11-23 14:24:03,305 INFO L226 Difference]: Without dead ends: 11 [2022-11-23 14:24:03,309 INFO L412 NwaCegarLoop]: 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 [2022-11-23 14:24:03,315 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:24:03,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:24:03,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-23 14:24:03,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-23 14:24:03,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:24:03,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-11-23 14:24:03,358 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 8 [2022-11-23 14:24:03,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:24:03,359 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-11-23 14:24:03,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:24:03,360 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-11-23 14:24:03,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 14:24:03,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:24:03,362 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:24:03,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:24:03,363 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:24:03,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:24:03,365 INFO L85 PathProgramCache]: Analyzing trace with hash 922752291, now seen corresponding path program 1 times [2022-11-23 14:24:03,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:24:03,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387822977] [2022-11-23 14:24:03,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:03,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:24:03,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:24:03,647 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:24:03,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387822977] [2022-11-23 14:24:03,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387822977] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:24:03,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112350363] [2022-11-23 14:24:03,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:03,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:24:03,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a4e575-6051-4fcd-9829-5a349a440574/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:24:03,663 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a4e575-6051-4fcd-9829-5a349a440574/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:24:03,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a4e575-6051-4fcd-9829-5a349a440574/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:24:03,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:03,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:24:03,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:24:03,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:24:03,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:24:03,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:24:03,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112350363] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:24:03,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [816396385] [2022-11-23 14:24:04,029 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:24:04,030 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:24:04,037 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:24:04,044 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:24:04,044 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:24:04,222 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-23 14:24:04,224 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-23 14:24:04,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:24:04,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:24:04,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:24:04,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:24:04,699 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-23 14:24:04,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 247 [2022-11-23 14:24:05,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 14:24:05,117 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:24:05,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [816396385] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:24:05,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:24:05,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 4, 4] total 11 [2022-11-23 14:24:05,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6016906] [2022-11-23 14:24:05,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:24:05,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 14:24:05,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:24:05,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 14:24:05,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-11-23 14:24:05,335 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:24:05,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:24:05,541 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2022-11-23 14:24:05,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:24:05,542 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 14:24:05,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:24:05,543 INFO L225 Difference]: With dead ends: 17 [2022-11-23 14:24:05,543 INFO L226 Difference]: Without dead ends: 12 [2022-11-23 14:24:05,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:24:05,545 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 5 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:24:05,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 12 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:24:05,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-11-23 14:24:05,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-11-23 14:24:05,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:24:05,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2022-11-23 14:24:05,556 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 9 [2022-11-23 14:24:05,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:24:05,557 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2022-11-23 14:24:05,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:24:05,559 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2022-11-23 14:24:05,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 14:24:05,559 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:24:05,560 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:24:05,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a4e575-6051-4fcd-9829-5a349a440574/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:24:05,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a4e575-6051-4fcd-9829-5a349a440574/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:24:05,766 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:24:05,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:24:05,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1455639679, now seen corresponding path program 1 times [2022-11-23 14:24:05,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:24:05,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856337994] [2022-11-23 14:24:05,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:05,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:24:05,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:05,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:24:05,875 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:24:05,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856337994] [2022-11-23 14:24:05,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856337994] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:24:05,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125196364] [2022-11-23 14:24:05,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:05,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:24:05,877 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a4e575-6051-4fcd-9829-5a349a440574/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:24:05,879 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a4e575-6051-4fcd-9829-5a349a440574/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:24:05,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a4e575-6051-4fcd-9829-5a349a440574/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:24:05,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:24:05,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:24:05,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:24:06,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:24:06,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:24:06,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:24:06,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125196364] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:24:06,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [768705604] [2022-11-23 14:24:06,058 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:24:06,059 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:24:06,059 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:24:06,059 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:24:06,060 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:24:06,162 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-11-23 14:24:06,163 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 32 treesize of output 53 [2022-11-23 14:24:06,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:24:06,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 14:24:06,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:24:06,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:24:06,376 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-23 14:24:06,377 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 258 treesize of output 246 [2022-11-23 14:24:06,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-23 14:24:06,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 19 treesize of output 11 [2022-11-23 14:24:06,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:24:06,581 INFO L350 Elim1Store]: Elim1 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 30 treesize of output 23 [2022-11-23 14:24:06,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 35 treesize of output 22 [2022-11-23 14:24:06,689 INFO L350 Elim1Store]: Elim1 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 67 treesize of output 48 [2022-11-23 14:24:06,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 35 treesize of output 22 [2022-11-23 14:24:06,780 INFO L350 Elim1Store]: Elim1 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 67 treesize of output 48 [2022-11-23 14:24:06,805 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:24:07,279 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '228#(and (= |ULTIMATE.start_main_~a~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 0) (= ~MAX~0 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= ~SIZE~0 100000) (<= 0 |ULTIMATE.start_assume_abort_if_not_#in~cond#1|) (= (select (select |#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ |ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (<= 0 |ULTIMATE.start_assume_abort_if_not_~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (< |ULTIMATE.start_main_~i~0#1| ~SIZE~0) (<= |ULTIMATE.start_assume_abort_if_not_#in~cond#1| 1) (= (ite (<= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_~i~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_assume_abort_if_not_~cond#1| 1) (= |#NULL.base| 0))' at error location [2022-11-23 14:24:07,279 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:24:07,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:24:07,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-23 14:24:07,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138576740] [2022-11-23 14:24:07,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:24:07,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:24:07,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:24:07,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:24:07,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-23 14:24:07,282 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:24:07,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:24:07,330 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2022-11-23 14:24:07,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 14:24:07,331 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-23 14:24:07,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:24:07,332 INFO L225 Difference]: With dead ends: 21 [2022-11-23 14:24:07,332 INFO L226 Difference]: Without dead ends: 13 [2022-11-23 14:24:07,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-11-23 14:24:07,334 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:24:07,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 14 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:24:07,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-11-23 14:24:07,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-11-23 14:24:07,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:24:07,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2022-11-23 14:24:07,341 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 10 [2022-11-23 14:24:07,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:24:07,342 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2022-11-23 14:24:07,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:24:07,342 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2022-11-23 14:24:07,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 14:24:07,343 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:24:07,343 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:24:07,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a4e575-6051-4fcd-9829-5a349a440574/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-23 14:24:07,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a4e575-6051-4fcd-9829-5a349a440574/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-23 14:24:07,550 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:24:07,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:24:07,550 INFO L85 PathProgramCache]: Analyzing trace with hash 895368030, now seen corresponding path program 2 times [2022-11-23 14:24:07,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:24:07,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362139492] [2022-11-23 14:24:07,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:24:07,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:24:07,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:24:07,603 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 14:24:07,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 14:24:07,666 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 14:24:07,666 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 14:24:07,668 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-23 14:24:07,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 14:24:07,681 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2022-11-23 14:24:07,687 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 14:24:07,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:24:07 BoogieIcfgContainer [2022-11-23 14:24:07,730 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 14:24:07,731 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 14:24:07,731 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 14:24:07,732 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 14:24:07,732 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:24:02" (3/4) ... [2022-11-23 14:24:07,735 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-23 14:24:07,805 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a4e575-6051-4fcd-9829-5a349a440574/bin/utaipan-Q6hlc19bkW/witness.graphml [2022-11-23 14:24:07,805 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 14:24:07,806 INFO L158 Benchmark]: Toolchain (without parser) took 5962.32ms. Allocated memory was 148.9MB in the beginning and 188.7MB in the end (delta: 39.8MB). Free memory was 118.1MB in the beginning and 73.5MB in the end (delta: 44.6MB). Peak memory consumption was 84.8MB. Max. memory is 16.1GB. [2022-11-23 14:24:07,807 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 123.7MB. Free memory is still 77.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 14:24:07,807 INFO L158 Benchmark]: CACSL2BoogieTranslator took 291.49ms. Allocated memory is still 148.9MB. Free memory was 117.8MB in the beginning and 107.0MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-23 14:24:07,808 INFO L158 Benchmark]: Boogie Procedure Inliner took 36.47ms. Allocated memory is still 148.9MB. Free memory was 107.0MB in the beginning and 105.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 14:24:07,808 INFO L158 Benchmark]: Boogie Preprocessor took 26.70ms. Allocated memory is still 148.9MB. Free memory was 105.5MB in the beginning and 104.1MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 14:24:07,809 INFO L158 Benchmark]: RCFGBuilder took 425.37ms. Allocated memory is still 148.9MB. Free memory was 104.1MB in the beginning and 88.8MB in the end (delta: 15.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-23 14:24:07,810 INFO L158 Benchmark]: TraceAbstraction took 5098.64ms. Allocated memory was 148.9MB in the beginning and 188.7MB in the end (delta: 39.8MB). Free memory was 88.1MB in the beginning and 75.6MB in the end (delta: 12.5MB). Peak memory consumption was 53.3MB. Max. memory is 16.1GB. [2022-11-23 14:24:07,810 INFO L158 Benchmark]: Witness Printer took 74.56ms. Allocated memory is still 188.7MB. Free memory was 75.6MB in the beginning and 73.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 14:24:07,818 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 123.7MB. Free memory is still 77.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 291.49ms. Allocated memory is still 148.9MB. Free memory was 117.8MB in the beginning and 107.0MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 36.47ms. Allocated memory is still 148.9MB. Free memory was 107.0MB in the beginning and 105.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.70ms. Allocated memory is still 148.9MB. Free memory was 105.5MB in the beginning and 104.1MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 425.37ms. Allocated memory is still 148.9MB. Free memory was 104.1MB in the beginning and 88.8MB in the end (delta: 15.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 5098.64ms. Allocated memory was 148.9MB in the beginning and 188.7MB in the end (delta: 39.8MB). Free memory was 88.1MB in the beginning and 75.6MB in the end (delta: 12.5MB). Peak memory consumption was 53.3MB. Max. memory is 16.1GB. * Witness Printer took 74.56ms. Allocated memory is still 188.7MB. Free memory was 75.6MB in the beginning and 73.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] int SIZE; [L14] const int MAX = 100000; [L18] SIZE = __VERIFIER_nondet_int() [L19] COND TRUE SIZE > 1 && SIZE < MAX [L21] int i; [L22] int *a = malloc(sizeof(int)*SIZE); [L24] i = 0 VAL [a={-1:0}, i=0, MAX=100000, SIZE=2] [L24] COND TRUE i < SIZE [L26] a[i] = __VERIFIER_nondet_int() [L24] i++ VAL [a={-1:0}, i=1, MAX=100000, SIZE=2] [L24] COND TRUE i < SIZE [L26] a[i] = __VERIFIER_nondet_int() [L24] i++ VAL [a={-1:0}, i=2, MAX=100000, SIZE=2] [L24] COND FALSE !(i < SIZE) VAL [a={-1:0}, i=2, MAX=100000, SIZE=2] [L29] COND FALSE !(SIZE % 2 != 0) [L31] CALL assume_abort_if_not(SIZE % 2 == 0) [L6] COND FALSE !(!cond) [L31] RET assume_abort_if_not(SIZE % 2 == 0) [L32] i = 1 VAL [a={-1:0}, i=1, MAX=100000, SIZE=2] [L32] COND TRUE i <= SIZE/2 [L34] EXPR a[2*i-2] [L34] COND FALSE !(a[2*i-2] > i) [L38] EXPR a[2*i-1] [L38] COND FALSE !(a[2*i-1] > i) [L32] i++ VAL [a={-1:0}, i=2, MAX=100000, SIZE=2] [L32] COND FALSE !(i <= SIZE/2) [L44] i = 0 VAL [a={-1:0}, i=0, MAX=100000, SIZE=2] [L44] COND TRUE i < SIZE [L46] EXPR a[i] [L46] CALL __VERIFIER_assert( a[i] <= i ) [L8] COND TRUE !(cond) VAL [cond=0, MAX=100000, SIZE=2, unknown-#in~cond-unknown=0] [L8] reach_error() VAL [cond=0, MAX=100000, SIZE=2, unknown-#in~cond-unknown=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.0s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 8 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 8 mSDsluCounter, 38 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 22 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 78 IncrementalHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 16 mSDtfsCounter, 78 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, InterpolantAutomatonStates: 15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 57 NumberOfCodeBlocks, 57 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 58 ConstructedInterpolants, 0 QuantifiedInterpolants, 124 SizeOfPredicates, 4 NumberOfNonLiveVariables, 165 ConjunctsInSsa, 8 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 3/9 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: OVERALL_TIME: 1.1s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 6, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 8, TOOLS_POST_TIME: 0.8s, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 8, TOOLS_QUANTIFIERELIM_TIME: 0.8s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.5s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 21, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 0, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME: 0.2s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 6, DOMAIN_ISBOTTOM_TIME: 0.0s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 0.8s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 0.8s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, PROCEDURE_GRAPH_BUILDER_TIME: 0.0s, PATH_EXPR_TIME: 0.0s, REGEX_TO_DAG_TIME: 0.0s, DAG_COMPRESSION_TIME: 0.0s, DAG_COMPRESSION_PROCESSED_NODES: 60, DAG_COMPRESSION_RETAINED_NODES: 24, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-23 14:24:07,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0a4e575-6051-4fcd-9829-5a349a440574/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE