./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-regression/test_while_int.c_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42999934-4eca-4216-9196-fa871aec4fdb/bin/utaipan-Xvt2sAort0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42999934-4eca-4216-9196-fa871aec4fdb/bin/utaipan-Xvt2sAort0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42999934-4eca-4216-9196-fa871aec4fdb/bin/utaipan-Xvt2sAort0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42999934-4eca-4216-9196-fa871aec4fdb/bin/utaipan-Xvt2sAort0/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-regression/test_while_int.c_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42999934-4eca-4216-9196-fa871aec4fdb/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42999934-4eca-4216-9196-fa871aec4fdb/bin/utaipan-Xvt2sAort0 --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 0fa3b5fd31b0165adcc8931bdb36ef94241c9d1c36f2e335867de97d47f976fb --- 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-e04fb08 [2022-11-16 20:28:20,792 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 20:28:20,794 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 20:28:20,840 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 20:28:20,840 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 20:28:20,842 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 20:28:20,843 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 20:28:20,846 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 20:28:20,852 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 20:28:20,862 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 20:28:20,863 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 20:28:20,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 20:28:20,865 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 20:28:20,866 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 20:28:20,867 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 20:28:20,869 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 20:28:20,870 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 20:28:20,871 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 20:28:20,873 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 20:28:20,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 20:28:20,888 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 20:28:20,891 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 20:28:20,893 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 20:28:20,894 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 20:28:20,898 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 20:28:20,899 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 20:28:20,899 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 20:28:20,901 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 20:28:20,901 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 20:28:20,902 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 20:28:20,903 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 20:28:20,904 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 20:28:20,905 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 20:28:20,906 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 20:28:20,907 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 20:28:20,908 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 20:28:20,909 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 20:28:20,909 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 20:28:20,909 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 20:28:20,910 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 20:28:20,911 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 20:28:20,913 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42999934-4eca-4216-9196-fa871aec4fdb/bin/utaipan-Xvt2sAort0/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-16 20:28:20,963 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 20:28:20,963 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 20:28:20,964 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 20:28:20,964 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 20:28:20,965 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 20:28:20,965 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 20:28:20,966 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-16 20:28:20,966 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-16 20:28:20,966 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-16 20:28:20,966 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-16 20:28:20,967 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-16 20:28:20,968 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-16 20:28:20,968 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-16 20:28:20,968 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-16 20:28:20,968 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-16 20:28:20,969 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-16 20:28:20,969 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-16 20:28:20,969 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-16 20:28:20,970 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 20:28:20,970 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 20:28:20,970 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 20:28:20,971 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 20:28:20,971 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 20:28:20,972 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 20:28:20,973 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 20:28:20,973 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 20:28:20,973 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 20:28:20,973 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 20:28:20,974 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 20:28:20,974 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 20:28:20,974 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 20:28:20,975 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 20:28:20,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:28:20,975 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 20:28:20,975 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-16 20:28:20,976 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 20:28:20,976 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 20:28:20,976 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-16 20:28:20,976 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 20:28:20,976 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 20:28:20,977 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-16 20:28:20,977 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_42999934-4eca-4216-9196-fa871aec4fdb/bin/utaipan-Xvt2sAort0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42999934-4eca-4216-9196-fa871aec4fdb/bin/utaipan-Xvt2sAort0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0fa3b5fd31b0165adcc8931bdb36ef94241c9d1c36f2e335867de97d47f976fb [2022-11-16 20:28:21,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 20:28:21,284 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 20:28:21,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 20:28:21,288 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 20:28:21,289 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 20:28:21,291 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42999934-4eca-4216-9196-fa871aec4fdb/bin/utaipan-Xvt2sAort0/../../sv-benchmarks/c/ldv-regression/test_while_int.c_1.i [2022-11-16 20:28:21,358 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42999934-4eca-4216-9196-fa871aec4fdb/bin/utaipan-Xvt2sAort0/data/e4ff99e09/803a436dad614e069b236001a316edf1/FLAG5048188d3 [2022-11-16 20:28:21,841 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 20:28:21,842 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42999934-4eca-4216-9196-fa871aec4fdb/sv-benchmarks/c/ldv-regression/test_while_int.c_1.i [2022-11-16 20:28:21,848 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42999934-4eca-4216-9196-fa871aec4fdb/bin/utaipan-Xvt2sAort0/data/e4ff99e09/803a436dad614e069b236001a316edf1/FLAG5048188d3 [2022-11-16 20:28:22,192 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42999934-4eca-4216-9196-fa871aec4fdb/bin/utaipan-Xvt2sAort0/data/e4ff99e09/803a436dad614e069b236001a316edf1 [2022-11-16 20:28:22,195 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 20:28:22,196 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 20:28:22,198 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 20:28:22,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 20:28:22,205 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 20:28:22,206 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:28:22" (1/1) ... [2022-11-16 20:28:22,207 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73e74fad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:28:22, skipping insertion in model container [2022-11-16 20:28:22,207 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 08:28:22" (1/1) ... [2022-11-16 20:28:22,216 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 20:28:22,231 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 20:28:22,403 WARN L229 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_42999934-4eca-4216-9196-fa871aec4fdb/sv-benchmarks/c/ldv-regression/test_while_int.c_1.i[300,313] [2022-11-16 20:28:22,424 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:28:22,437 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 20:28:22,458 WARN L229 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_42999934-4eca-4216-9196-fa871aec4fdb/sv-benchmarks/c/ldv-regression/test_while_int.c_1.i[300,313] [2022-11-16 20:28:22,460 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 20:28:22,477 INFO L208 MainTranslator]: Completed translation [2022-11-16 20:28:22,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:28:22 WrapperNode [2022-11-16 20:28:22,477 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 20:28:22,480 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 20:28:22,480 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 20:28:22,480 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 20:28:22,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:28:22" (1/1) ... [2022-11-16 20:28:22,499 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:28:22" (1/1) ... [2022-11-16 20:28:22,519 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 25 [2022-11-16 20:28:22,520 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 20:28:22,521 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 20:28:22,521 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 20:28:22,521 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 20:28:22,531 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:28:22" (1/1) ... [2022-11-16 20:28:22,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:28:22" (1/1) ... [2022-11-16 20:28:22,535 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:28:22" (1/1) ... [2022-11-16 20:28:22,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:28:22" (1/1) ... [2022-11-16 20:28:22,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:28:22" (1/1) ... [2022-11-16 20:28:22,544 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:28:22" (1/1) ... [2022-11-16 20:28:22,547 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:28:22" (1/1) ... [2022-11-16 20:28:22,548 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:28:22" (1/1) ... [2022-11-16 20:28:22,553 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 20:28:22,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 20:28:22,556 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 20:28:22,556 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 20:28:22,557 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:28:22" (1/1) ... [2022-11-16 20:28:22,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 20:28:22,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42999934-4eca-4216-9196-fa871aec4fdb/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:28:22,596 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42999934-4eca-4216-9196-fa871aec4fdb/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 20:28:22,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42999934-4eca-4216-9196-fa871aec4fdb/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 20:28:22,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 20:28:22,665 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 20:28:22,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 20:28:22,666 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 20:28:22,752 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 20:28:22,754 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 20:28:22,865 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 20:28:22,887 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 20:28:22,888 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-16 20:28:22,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:28:22 BoogieIcfgContainer [2022-11-16 20:28:22,895 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 20:28:22,897 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 20:28:22,897 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 20:28:22,903 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 20:28:22,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 08:28:22" (1/3) ... [2022-11-16 20:28:22,911 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64c3d04e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:28:22, skipping insertion in model container [2022-11-16 20:28:22,911 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 08:28:22" (2/3) ... [2022-11-16 20:28:22,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64c3d04e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 08:28:22, skipping insertion in model container [2022-11-16 20:28:22,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:28:22" (3/3) ... [2022-11-16 20:28:22,914 INFO L112 eAbstractionObserver]: Analyzing ICFG test_while_int.c_1.i [2022-11-16 20:28:22,934 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 20:28:22,934 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 20:28:22,986 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 20:28:22,996 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;@3531adb9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 20:28:22,997 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-16 20:28:23,002 INFO L276 IsEmpty]: Start isEmpty. Operand has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 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) [2022-11-16 20:28:23,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-11-16 20:28:23,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:28:23,011 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-11-16 20:28:23,012 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:28:23,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:28:23,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1887918, now seen corresponding path program 1 times [2022-11-16 20:28:23,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:28:23,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616745950] [2022-11-16 20:28:23,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:28:23,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:28:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:28:23,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:28:23,299 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:28:23,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616745950] [2022-11-16 20:28:23,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616745950] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 20:28:23,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 20:28:23,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-16 20:28:23,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530047698] [2022-11-16 20:28:23,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 20:28:23,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-16 20:28:23,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:28:23,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-16 20:28:23,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:28:23,347 INFO L87 Difference]: Start difference. First operand has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 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 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-11-16 20:28:23,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:28:23,422 INFO L93 Difference]: Finished difference Result 14 states and 19 transitions. [2022-11-16 20:28:23,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 20:28:23,425 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-11-16 20:28:23,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:28:23,434 INFO L225 Difference]: With dead ends: 14 [2022-11-16 20:28:23,437 INFO L226 Difference]: Without dead ends: 8 [2022-11-16 20:28:23,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-16 20:28:23,449 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:28:23,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 3 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:28:23,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-11-16 20:28:23,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 7. [2022-11-16 20:28:23,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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) [2022-11-16 20:28:23,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2022-11-16 20:28:23,526 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2022-11-16 20:28:23,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:28:23,526 INFO L495 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2022-11-16 20:28:23,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-11-16 20:28:23,527 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2022-11-16 20:28:23,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 20:28:23,528 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:28:23,528 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-16 20:28:23,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 20:28:23,529 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:28:23,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:28:23,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1814223403, now seen corresponding path program 1 times [2022-11-16 20:28:23,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:28:23,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701145598] [2022-11-16 20:28:23,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:28:23,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:28:23,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:28:23,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:28:23,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-16 20:28:23,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701145598] [2022-11-16 20:28:23,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701145598] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 20:28:23,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767085095] [2022-11-16 20:28:23,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:28:23,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 20:28:23,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42999934-4eca-4216-9196-fa871aec4fdb/bin/utaipan-Xvt2sAort0/z3 [2022-11-16 20:28:23,692 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42999934-4eca-4216-9196-fa871aec4fdb/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 20:28:23,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42999934-4eca-4216-9196-fa871aec4fdb/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 20:28:23,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 20:28:23,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 20:28:23,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 20:28:23,817 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:28:23,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 20:28:23,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 20:28:23,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767085095] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 20:28:23,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [250065953] [2022-11-16 20:28:23,870 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2022-11-16 20:28:23,870 INFO L166 IcfgInterpreter]: Building call graph [2022-11-16 20:28:23,874 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-16 20:28:23,880 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-16 20:28:23,881 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-16 20:28:24,124 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-16 20:28:24,268 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '76#(and (= 3 |ULTIMATE.start_main_~i~0#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-16 20:28:24,268 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-16 20:28:24,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 20:28:24,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-11-16 20:28:24,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601853510] [2022-11-16 20:28:24,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 20:28:24,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 20:28:24,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-16 20:28:24,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 20:28:24,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-16 20:28:24,272 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:28:24,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 20:28:24,297 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2022-11-16 20:28:24,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 20:28:24,298 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-16 20:28:24,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 20:28:24,298 INFO L225 Difference]: With dead ends: 12 [2022-11-16 20:28:24,299 INFO L226 Difference]: Without dead ends: 10 [2022-11-16 20:28:24,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-11-16 20:28:24,301 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 20:28:24,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 4 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 20:28:24,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-11-16 20:28:24,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2022-11-16 20:28:24,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 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) [2022-11-16 20:28:24,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2022-11-16 20:28:24,307 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2022-11-16 20:28:24,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 20:28:24,308 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2022-11-16 20:28:24,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 20:28:24,308 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2022-11-16 20:28:24,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-16 20:28:24,309 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 20:28:24,309 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1] [2022-11-16 20:28:24,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42999934-4eca-4216-9196-fa871aec4fdb/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 20:28:24,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42999934-4eca-4216-9196-fa871aec4fdb/bin/utaipan-Xvt2sAort0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-16 20:28:24,516 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 20:28:24,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 20:28:24,517 INFO L85 PathProgramCache]: Analyzing trace with hash -288097688, now seen corresponding path program 2 times [2022-11-16 20:28:24,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-16 20:28:24,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041564475] [2022-11-16 20:28:24,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 20:28:24,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 20:28:24,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 20:28:24,530 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 20:28:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 20:28:24,562 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-16 20:28:24,564 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 20:28:24,570 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-16 20:28:24,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 20:28:24,578 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1] [2022-11-16 20:28:24,582 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-16 20:28:24,607 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.11 08:28:24 BoogieIcfgContainer [2022-11-16 20:28:24,608 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-16 20:28:24,609 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-16 20:28:24,609 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-16 20:28:24,609 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-16 20:28:24,610 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 08:28:22" (3/4) ... [2022-11-16 20:28:24,614 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-16 20:28:24,669 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42999934-4eca-4216-9196-fa871aec4fdb/bin/utaipan-Xvt2sAort0/witness.graphml [2022-11-16 20:28:24,671 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-16 20:28:24,672 INFO L158 Benchmark]: Toolchain (without parser) took 2475.91ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 75.8MB in the beginning and 96.0MB in the end (delta: -20.2MB). Peak memory consumption was 1.4MB. Max. memory is 16.1GB. [2022-11-16 20:28:24,673 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 107.0MB. Free memory was 60.5MB in the beginning and 60.5MB in the end (delta: 92.4kB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 20:28:24,673 INFO L158 Benchmark]: CACSL2BoogieTranslator took 279.58ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 75.8MB in the beginning and 105.9MB in the end (delta: -30.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-16 20:28:24,674 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.68ms. Allocated memory is still 130.0MB. Free memory was 105.9MB in the beginning and 104.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 20:28:24,674 INFO L158 Benchmark]: Boogie Preprocessor took 32.65ms. Allocated memory is still 130.0MB. Free memory was 104.5MB in the beginning and 103.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 20:28:24,675 INFO L158 Benchmark]: RCFGBuilder took 339.51ms. Allocated memory is still 130.0MB. Free memory was 103.4MB in the beginning and 93.5MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-16 20:28:24,675 INFO L158 Benchmark]: TraceAbstraction took 1710.76ms. Allocated memory is still 130.0MB. Free memory was 92.9MB in the beginning and 98.1MB in the end (delta: -5.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-11-16 20:28:24,678 INFO L158 Benchmark]: Witness Printer took 62.87ms. Allocated memory is still 130.0MB. Free memory was 98.1MB in the beginning and 96.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-16 20:28:24,681 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 107.0MB. Free memory was 60.5MB in the beginning and 60.5MB in the end (delta: 92.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 279.58ms. Allocated memory was 107.0MB in the beginning and 130.0MB in the end (delta: 23.1MB). Free memory was 75.8MB in the beginning and 105.9MB in the end (delta: -30.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.68ms. Allocated memory is still 130.0MB. Free memory was 105.9MB in the beginning and 104.5MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.65ms. Allocated memory is still 130.0MB. Free memory was 104.5MB in the beginning and 103.4MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 339.51ms. Allocated memory is still 130.0MB. Free memory was 103.4MB in the beginning and 93.5MB in the end (delta: 10.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 1710.76ms. Allocated memory is still 130.0MB. Free memory was 92.9MB in the beginning and 98.1MB in the end (delta: -5.2MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 62.87ms. Allocated memory is still 130.0MB. Free memory was 98.1MB in the beginning and 96.0MB 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.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: [L14] int i=0; VAL [i=0] [L15] COND TRUE i<5 [L16] i++ VAL [i=1] [L18] (i!=3) ? (0) : __blast_assert () VAL [i=1] [L15] COND TRUE i<5 [L16] i++ VAL [i=2] [L18] (i!=3) ? (0) : __blast_assert () VAL [i=2] [L15] COND TRUE i<5 [L16] i++ VAL [i=3] [L18] (i!=3) ? (0) : __blast_assert () [L18] CALL __blast_assert () [L8] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 6 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.6s, OverallIterations: 3, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3 mSDsluCounter, 7 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 23 IncrementalHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 4 mSDtfsCounter, 23 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred in iteration=2, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 46 SizeOfPredicates, 0 NumberOfNonLiveVariables, 37 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-16 20:28:24,718 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_42999934-4eca-4216-9196-fa871aec4fdb/bin/utaipan-Xvt2sAort0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, 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