./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/linear_sea.ch.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_4719ed84-9ba6-48e4-ae81-51e7b1fb6948/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4719ed84-9ba6-48e4-ae81-51e7b1fb6948/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4719ed84-9ba6-48e4-ae81-51e7b1fb6948/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4719ed84-9ba6-48e4-ae81-51e7b1fb6948/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/linear_sea.ch.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4719ed84-9ba6-48e4-ae81-51e7b1fb6948/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4719ed84-9ba6-48e4-ae81-51e7b1fb6948/bin/utaipan-gh47qXpMRh --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 eb9784c54ab470258ada67babaf5f63148f3484f17edd94b8d28d55553534fa5 --- 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-2329fc7 [2022-12-14 08:42:24,771 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:42:24,772 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:42:24,790 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:42:24,790 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:42:24,791 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:42:24,792 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:42:24,794 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:42:24,795 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:42:24,796 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:42:24,797 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:42:24,798 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:42:24,798 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:42:24,799 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:42:24,800 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:42:24,801 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:42:24,802 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:42:24,803 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:42:24,804 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:42:24,806 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:42:24,807 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:42:24,808 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:42:24,810 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:42:24,810 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:42:24,814 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:42:24,814 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:42:24,814 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:42:24,815 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:42:24,815 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:42:24,816 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:42:24,816 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:42:24,817 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:42:24,818 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:42:24,818 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:42:24,819 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:42:24,819 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:42:24,820 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:42:24,820 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:42:24,820 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:42:24,821 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:42:24,821 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:42:24,822 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4719ed84-9ba6-48e4-ae81-51e7b1fb6948/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 08:42:24,836 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:42:24,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:42:24,836 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:42:24,836 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:42:24,837 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:42:24,837 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:42:24,837 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:42:24,837 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:42:24,837 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:42:24,837 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:42:24,837 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:42:24,837 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:42:24,837 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:42:24,837 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:42:24,838 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:42:24,838 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:42:24,838 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:42:24,838 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:42:24,838 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:42:24,838 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:42:24,838 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:42:24,839 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:42:24,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:42:24,839 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:42:24,839 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:42:24,839 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:42:24,839 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:42:24,839 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:42:24,839 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:42:24,839 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:42:24,839 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:42:24,840 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:42:24,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:42:24,840 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:42:24,840 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:42:24,840 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:42:24,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:42:24,840 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:42:24,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:42:24,840 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:42:24,840 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:42:24,840 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_4719ed84-9ba6-48e4-ae81-51e7b1fb6948/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4719ed84-9ba6-48e4-ae81-51e7b1fb6948/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eb9784c54ab470258ada67babaf5f63148f3484f17edd94b8d28d55553534fa5 [2022-12-14 08:42:25,023 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:42:25,042 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:42:25,045 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:42:25,046 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:42:25,046 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:42:25,047 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4719ed84-9ba6-48e4-ae81-51e7b1fb6948/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/loops/linear_sea.ch.c [2022-12-14 08:42:27,718 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:42:27,851 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:42:27,852 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4719ed84-9ba6-48e4-ae81-51e7b1fb6948/sv-benchmarks/c/loops/linear_sea.ch.c [2022-12-14 08:42:27,856 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4719ed84-9ba6-48e4-ae81-51e7b1fb6948/bin/utaipan-gh47qXpMRh/data/37e536b30/403b69e060b244aab895f082eda511b2/FLAGa6b3f9d78 [2022-12-14 08:42:27,868 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4719ed84-9ba6-48e4-ae81-51e7b1fb6948/bin/utaipan-gh47qXpMRh/data/37e536b30/403b69e060b244aab895f082eda511b2 [2022-12-14 08:42:27,870 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:42:27,872 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:42:27,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:42:27,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:42:27,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:42:27,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:42:27" (1/1) ... [2022-12-14 08:42:27,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b66ff4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:42:27, skipping insertion in model container [2022-12-14 08:42:27,877 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:42:27" (1/1) ... [2022-12-14 08:42:27,883 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:42:27,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:42:28,006 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_4719ed84-9ba6-48e4-ae81-51e7b1fb6948/sv-benchmarks/c/loops/linear_sea.ch.c[383,396] [2022-12-14 08:42:28,020 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:42:28,030 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:42:28,039 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_4719ed84-9ba6-48e4-ae81-51e7b1fb6948/sv-benchmarks/c/loops/linear_sea.ch.c[383,396] [2022-12-14 08:42:28,043 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:42:28,054 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:42:28,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:42:28 WrapperNode [2022-12-14 08:42:28,055 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:42:28,055 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:42:28,056 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:42:28,056 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:42:28,061 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:42:28" (1/1) ... [2022-12-14 08:42:28,067 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:42:28" (1/1) ... [2022-12-14 08:42:28,082 INFO L138 Inliner]: procedures = 17, calls = 13, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 54 [2022-12-14 08:42:28,082 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:42:28,082 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:42:28,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:42:28,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:42:28,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:42:28" (1/1) ... [2022-12-14 08:42:28,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:42:28" (1/1) ... [2022-12-14 08:42:28,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:42:28" (1/1) ... [2022-12-14 08:42:28,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:42:28" (1/1) ... [2022-12-14 08:42:28,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:42:28" (1/1) ... [2022-12-14 08:42:28,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:42:28" (1/1) ... [2022-12-14 08:42:28,099 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:42:28" (1/1) ... [2022-12-14 08:42:28,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:42:28" (1/1) ... [2022-12-14 08:42:28,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:42:28,102 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:42:28,102 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:42:28,102 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:42:28,103 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:42:28" (1/1) ... [2022-12-14 08:42:28,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:42:28,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4719ed84-9ba6-48e4-ae81-51e7b1fb6948/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:42:28,127 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4719ed84-9ba6-48e4-ae81-51e7b1fb6948/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:42:28,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4719ed84-9ba6-48e4-ae81-51e7b1fb6948/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:42:28,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:42:28,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:42:28,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 08:42:28,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 08:42:28,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:42:28,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:42:28,164 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 08:42:28,236 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:42:28,238 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:42:28,351 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:42:28,389 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:42:28,390 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-14 08:42:28,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:42:28 BoogieIcfgContainer [2022-12-14 08:42:28,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:42:28,395 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:42:28,395 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:42:28,399 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:42:28,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:42:27" (1/3) ... [2022-12-14 08:42:28,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fdc34ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:42:28, skipping insertion in model container [2022-12-14 08:42:28,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:42:28" (2/3) ... [2022-12-14 08:42:28,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fdc34ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:42:28, skipping insertion in model container [2022-12-14 08:42:28,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:42:28" (3/3) ... [2022-12-14 08:42:28,402 INFO L112 eAbstractionObserver]: Analyzing ICFG linear_sea.ch.c [2022-12-14 08:42:28,418 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:42:28,418 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 08:42:28,458 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:42:28,465 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;@218641b9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:42:28,465 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 08:42:28,468 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 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) [2022-12-14 08:42:28,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 08:42:28,472 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:42:28,472 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 08:42:28,473 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:42:28,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:42:28,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1928108671, now seen corresponding path program 1 times [2022-12-14 08:42:28,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:42:28,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663839533] [2022-12-14 08:42:28,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:42:28,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:42:28,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:42:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:42:28,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:42:28,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663839533] [2022-12-14 08:42:28,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663839533] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:42:28,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:42:28,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:42:28,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57181810] [2022-12-14 08:42:28,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:42:28,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 08:42:28,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:42:28,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 08:42:28,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 08:42:28,639 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-12-14 08:42:28,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:42:28,664 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2022-12-14 08:42:28,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 08:42:28,667 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 [2022-12-14 08:42:28,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:42:28,672 INFO L225 Difference]: With dead ends: 18 [2022-12-14 08:42:28,672 INFO L226 Difference]: Without dead ends: 8 [2022-12-14 08:42:28,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 08:42:28,677 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:42:28,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:42:28,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-12-14 08:42:28,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-12-14 08:42:28,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 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) [2022-12-14 08:42:28,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2022-12-14 08:42:28,699 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2022-12-14 08:42:28,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:42:28,699 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2022-12-14 08:42:28,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2022-12-14 08:42:28,700 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2022-12-14 08:42:28,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 08:42:28,700 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:42:28,700 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:42:28,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:42:28,700 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:42:28,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:42:28,701 INFO L85 PathProgramCache]: Analyzing trace with hash 385836665, now seen corresponding path program 1 times [2022-12-14 08:42:28,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:42:28,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128895113] [2022-12-14 08:42:28,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:42:28,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:42:28,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:42:28,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:42:28,968 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:42:28,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128895113] [2022-12-14 08:42:28,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128895113] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:42:28,968 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:42:28,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 08:42:28,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089379418] [2022-12-14 08:42:28,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:42:28,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-14 08:42:28,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:42:28,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-14 08:42:28,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-12-14 08:42:28,971 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2022-12-14 08:42:29,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:42:29,012 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2022-12-14 08:42:29,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-14 08:42:29,013 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) Word has length 7 [2022-12-14 08:42:29,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:42:29,014 INFO L225 Difference]: With dead ends: 14 [2022-12-14 08:42:29,014 INFO L226 Difference]: Without dead ends: 10 [2022-12-14 08:42:29,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-12-14 08:42:29,015 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:42:29,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 8 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:42:29,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-12-14 08:42:29,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-12-14 08:42:29,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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) [2022-12-14 08:42:29,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2022-12-14 08:42:29,020 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2022-12-14 08:42:29,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:42:29,020 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2022-12-14 08:42:29,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 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) [2022-12-14 08:42:29,020 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2022-12-14 08:42:29,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 08:42:29,021 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:42:29,021 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:42:29,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 08:42:29,021 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:42:29,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:42:29,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1480522618, now seen corresponding path program 1 times [2022-12-14 08:42:29,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:42:29,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117992755] [2022-12-14 08:42:29,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:42:29,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:42:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:42:29,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:42:29,199 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:42:29,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117992755] [2022-12-14 08:42:29,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117992755] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:42:29,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501719411] [2022-12-14 08:42:29,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:42:29,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:42:29,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4719ed84-9ba6-48e4-ae81-51e7b1fb6948/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:42:29,201 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4719ed84-9ba6-48e4-ae81-51e7b1fb6948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:42:29,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4719ed84-9ba6-48e4-ae81-51e7b1fb6948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:42:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:42:29,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 08:42:29,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:42:29,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:42:29,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:42:29,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:42:29,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501719411] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:42:29,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [301796675] [2022-12-14 08:42:29,439 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 08:42:29,439 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:42:29,441 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:42:29,445 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:42:29,446 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:42:29,561 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 08:42:29,562 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 [2022-12-14 08:42:29,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:42:29,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:42:29,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:42:29,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:42:29,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:42:29,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 111 [2022-12-14 08:42:29,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:42:29,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:42:29,660 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 65 treesize of output 34 [2022-12-14 08:42:29,682 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 [2022-12-14 08:42:29,943 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:42:30,618 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '143#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_#Ultimate.meminit_#sizeOfFields#1| 4) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (not (< (mod |ULTIMATE.start_linear_search_~j~0#1| 4294967296) (mod ~SIZE~0 4294967296))) (or (not (< (mod |ULTIMATE.start_linear_search_~j~0#1| 4294967296) (mod |ULTIMATE.start_linear_search_~n#1| 4294967296))) (= (select (select |#memory_int| |ULTIMATE.start_linear_search_~a#1.base|) (+ |ULTIMATE.start_linear_search_~a#1.offset| (* (ite (<= (mod |ULTIMATE.start_linear_search_~j~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_linear_search_~j~0#1| 4294967296) (+ (mod |ULTIMATE.start_linear_search_~j~0#1| 4294967296) (- 4294967296))) 4))) |ULTIMATE.start_linear_search_~q#1|)) (= ~MAX~0 100000) (<= 3 |ULTIMATE.start_linear_search_~q#1|) (<= |ULTIMATE.start_linear_search_~a#1.offset| 0) (= |ULTIMATE.start_main_#t~ret9#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1 ~SIZE~0) (<= 0 |ULTIMATE.start_linear_search_~a#1.offset|) (<= 1 |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1|) (<= ~SIZE~0 536870912) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 3 |ULTIMATE.start_linear_search_#in~q#1|) (<= 0 |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset|) (<= 4 |ULTIMATE.start_#Ultimate.meminit_#product#1|) (<= |ULTIMATE.start_linear_search_~q#1| 3) (<= |ULTIMATE.start_linear_search_#in~a#1.offset| 0) (<= |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 536870912) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_#Ultimate.meminit_#product#1| 2147483648) (<= 0 |ULTIMATE.start_linear_search_~j~0#1|) (= |ULTIMATE.start_main_#t~ret9#1| |ULTIMATE.start_linear_search_#res#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset| 0) (<= 0 |ULTIMATE.start_linear_search_#in~a#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 08:42:30,618 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:42:30,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:42:30,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-12-14 08:42:30,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123335008] [2022-12-14 08:42:30,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:42:30,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 08:42:30,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:42:30,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 08:42:30,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-12-14 08:42:30,620 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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) [2022-12-14 08:42:30,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:42:30,667 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2022-12-14 08:42:30,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-14 08:42:30,667 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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 [2022-12-14 08:42:30,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:42:30,668 INFO L225 Difference]: With dead ends: 16 [2022-12-14 08:42:30,668 INFO L226 Difference]: Without dead ends: 12 [2022-12-14 08:42:30,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-12-14 08:42:30,669 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:42:30,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 16 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:42:30,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-12-14 08:42:30,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-12-14 08:42:30,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 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) [2022-12-14 08:42:30,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2022-12-14 08:42:30,671 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2022-12-14 08:42:30,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:42:30,672 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2022-12-14 08:42:30,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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) [2022-12-14 08:42:30,672 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2022-12-14 08:42:30,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 08:42:30,672 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:42:30,672 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2022-12-14 08:42:30,678 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4719ed84-9ba6-48e4-ae81-51e7b1fb6948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-12-14 08:42:30,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4719ed84-9ba6-48e4-ae81-51e7b1fb6948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:42:30,875 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:42:30,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:42:30,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1206735931, now seen corresponding path program 2 times [2022-12-14 08:42:30,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:42:30,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946648879] [2022-12-14 08:42:30,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:42:30,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:42:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:42:31,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:42:31,724 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:42:31,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946648879] [2022-12-14 08:42:31,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946648879] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:42:31,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456782467] [2022-12-14 08:42:31,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:42:31,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:42:31,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4719ed84-9ba6-48e4-ae81-51e7b1fb6948/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:42:31,726 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4719ed84-9ba6-48e4-ae81-51e7b1fb6948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:42:31,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4719ed84-9ba6-48e4-ae81-51e7b1fb6948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:42:31,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 08:42:31,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:42:31,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 44 conjunts are in the unsatisfiable core [2022-12-14 08:42:31,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:42:31,897 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 08:42:31,898 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 1 case distinctions, treesize of input 122 treesize of output 123 [2022-12-14 08:42:31,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 176 [2022-12-14 08:42:31,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 149 [2022-12-14 08:42:31,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 3 [2022-12-14 08:42:31,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 3 [2022-12-14 08:42:32,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 3 [2022-12-14 08:42:32,172 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 08:42:32,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 83 treesize of output 68 [2022-12-14 08:42:32,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:42:32,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:42:32,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 112 [2022-12-14 08:42:32,821 INFO L321 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2022-12-14 08:42:32,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 1 [2022-12-14 08:42:32,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:42:32,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456782467] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:42:32,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [687090147] [2022-12-14 08:42:32,825 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 08:42:32,825 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:42:32,825 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:42:32,825 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:42:32,826 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:42:32,880 INFO L321 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2022-12-14 08:42:32,881 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 [2022-12-14 08:42:32,896 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 [2022-12-14 08:42:32,906 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:42:32,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:42:32,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:42:32,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:42:32,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:42:32,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 111 [2022-12-14 08:42:32,936 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:42:33,404 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:42:34,161 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '266#(and (= |ULTIMATE.start_main_#t~malloc8#1.offset| 0) (= |ULTIMATE.start_#Ultimate.meminit_#sizeOfFields#1| 4) (<= 0 |ULTIMATE.start_main_~a~0#1.offset|) (not (< (mod |ULTIMATE.start_linear_search_~j~0#1| 4294967296) (mod ~SIZE~0 4294967296))) (or (not (< (mod |ULTIMATE.start_linear_search_~j~0#1| 4294967296) (mod |ULTIMATE.start_linear_search_~n#1| 4294967296))) (= (select (select |#memory_int| |ULTIMATE.start_linear_search_~a#1.base|) (+ |ULTIMATE.start_linear_search_~a#1.offset| (* (ite (<= (mod |ULTIMATE.start_linear_search_~j~0#1| 4294967296) 2147483647) (mod |ULTIMATE.start_linear_search_~j~0#1| 4294967296) (+ (mod |ULTIMATE.start_linear_search_~j~0#1| 4294967296) (- 4294967296))) 4))) |ULTIMATE.start_linear_search_~q#1|)) (= ~MAX~0 100000) (<= 3 |ULTIMATE.start_linear_search_~q#1|) (<= |ULTIMATE.start_linear_search_~a#1.offset| 0) (= |ULTIMATE.start_main_#t~ret9#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 1 ~SIZE~0) (<= 0 |ULTIMATE.start_linear_search_~a#1.offset|) (<= 1 |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1|) (<= ~SIZE~0 536870912) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= 3 |ULTIMATE.start_linear_search_#in~q#1|) (<= 0 |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset|) (<= 4 |ULTIMATE.start_#Ultimate.meminit_#product#1|) (<= |ULTIMATE.start_linear_search_~q#1| 3) (<= |ULTIMATE.start_linear_search_#in~a#1.offset| 0) (<= |ULTIMATE.start_#Ultimate.meminit_#amountOfFields#1| 536870912) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= |ULTIMATE.start_#Ultimate.meminit_#product#1| 2147483648) (<= 0 |ULTIMATE.start_linear_search_~j~0#1|) (= |ULTIMATE.start_main_#t~ret9#1| |ULTIMATE.start_linear_search_#res#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~a~0#1.offset| 0) (<= |ULTIMATE.start_#Ultimate.meminit_#ptr#1.offset| 0) (<= 0 |ULTIMATE.start_linear_search_#in~a#1.offset|) (= |#NULL.base| 0))' at error location [2022-12-14 08:42:34,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:42:34,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:42:34,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-12-14 08:42:34,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545943152] [2022-12-14 08:42:34,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:42:34,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-12-14 08:42:34,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:42:34,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-12-14 08:42:34,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-12-14 08:42:34,163 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 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) [2022-12-14 08:42:34,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:42:34,665 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2022-12-14 08:42:34,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 08:42:34,665 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 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 11 [2022-12-14 08:42:34,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:42:34,666 INFO L225 Difference]: With dead ends: 22 [2022-12-14 08:42:34,666 INFO L226 Difference]: Without dead ends: 16 [2022-12-14 08:42:34,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2022-12-14 08:42:34,667 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 33 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:42:34,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 29 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:42:34,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-12-14 08:42:34,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-12-14 08:42:34,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 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) [2022-12-14 08:42:34,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2022-12-14 08:42:34,670 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2022-12-14 08:42:34,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:42:34,670 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2022-12-14 08:42:34,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 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) [2022-12-14 08:42:34,671 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2022-12-14 08:42:34,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 08:42:34,671 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:42:34,671 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 08:42:34,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4719ed84-9ba6-48e4-ae81-51e7b1fb6948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 08:42:34,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4719ed84-9ba6-48e4-ae81-51e7b1fb6948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-12-14 08:42:34,873 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:42:34,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:42:34,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1355452669, now seen corresponding path program 3 times [2022-12-14 08:42:34,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:42:34,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911470406] [2022-12-14 08:42:34,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:42:34,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:42:34,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:42:38,993 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 08:42:38,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:42:38,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911470406] [2022-12-14 08:42:38,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911470406] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:42:38,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308678117] [2022-12-14 08:42:38,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:42:38,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:42:38,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4719ed84-9ba6-48e4-ae81-51e7b1fb6948/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:42:38,995 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4719ed84-9ba6-48e4-ae81-51e7b1fb6948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:42:38,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4719ed84-9ba6-48e4-ae81-51e7b1fb6948/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 08:42:39,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:42:39,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:42:39,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 45 conjunts are in the unsatisfiable core [2022-12-14 08:42:39,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:42:39,161 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 08:42:39,162 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 1 case distinctions, treesize of input 122 treesize of output 123 [2022-12-14 08:42:39,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 176 [2022-12-14 08:42:39,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 149 [2022-12-14 08:42:39,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 3 [2022-12-14 08:42:39,218 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 08:42:39,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 3 [2022-12-14 08:42:40,233 INFO L321 Elim1Store]: treesize reduction 82, result has 43.4 percent of original size [2022-12-14 08:42:40,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 117 treesize of output 122 [2022-12-14 08:44:35,470 WARN L233 SmtUtils]: Spent 1.86m on a formula simplification. DAG size of input: 14247 DAG size of output: 12397 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)