./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-programs/copysome2-1.i --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_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/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_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-programs/copysome2-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/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_2dd58d7f-1e18-4940-95bc-5c51efefbd90/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 f2acf1d88f73f9b993c11cfca399c08f166d9054c3a2d816b9c02e1296c27b35 --- 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 09:22:08,781 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 09:22:08,783 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 09:22:08,800 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 09:22:08,800 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 09:22:08,801 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 09:22:08,802 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 09:22:08,804 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 09:22:08,805 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 09:22:08,806 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 09:22:08,807 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 09:22:08,808 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 09:22:08,808 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 09:22:08,809 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 09:22:08,810 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 09:22:08,811 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 09:22:08,812 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 09:22:08,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 09:22:08,814 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 09:22:08,815 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 09:22:08,817 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 09:22:08,818 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 09:22:08,819 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 09:22:08,820 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 09:22:08,823 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 09:22:08,824 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 09:22:08,824 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 09:22:08,825 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 09:22:08,825 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 09:22:08,826 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 09:22:08,826 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 09:22:08,827 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 09:22:08,827 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 09:22:08,828 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 09:22:08,829 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 09:22:08,829 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 09:22:08,830 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 09:22:08,830 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 09:22:08,830 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 09:22:08,831 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 09:22:08,831 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 09:22:08,832 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 09:22:08,853 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 09:22:08,853 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 09:22:08,854 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 09:22:08,854 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 09:22:08,860 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 09:22:08,860 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 09:22:08,861 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 09:22:08,861 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 09:22:08,861 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 09:22:08,861 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 09:22:08,861 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 09:22:08,861 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 09:22:08,861 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 09:22:08,861 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 09:22:08,862 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 09:22:08,862 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 09:22:08,862 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 09:22:08,862 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 09:22:08,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 09:22:08,863 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 09:22:08,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 09:22:08,863 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 09:22:08,863 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 09:22:08,863 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 09:22:08,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 09:22:08,863 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 09:22:08,863 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 09:22:08,863 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 09:22:08,864 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 09:22:08,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 09:22:08,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 09:22:08,864 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 09:22:08,864 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:22:08,864 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 09:22:08,864 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 09:22:08,864 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 09:22:08,864 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 09:22:08,865 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 09:22:08,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 09:22:08,865 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 09:22:08,865 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 09:22:08,865 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_2dd58d7f-1e18-4940-95bc-5c51efefbd90/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f2acf1d88f73f9b993c11cfca399c08f166d9054c3a2d816b9c02e1296c27b35 [2022-12-14 09:22:09,059 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 09:22:09,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 09:22:09,080 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 09:22:09,081 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 09:22:09,081 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 09:22:09,082 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-programs/copysome2-1.i [2022-12-14 09:22:11,648 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 09:22:11,801 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 09:22:11,801 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/sv-benchmarks/c/array-programs/copysome2-1.i [2022-12-14 09:22:11,807 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/data/c184e50a0/7e2ffb8b01554032900bdd0c98e1f007/FLAG621e6ac6c [2022-12-14 09:22:11,819 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/data/c184e50a0/7e2ffb8b01554032900bdd0c98e1f007 [2022-12-14 09:22:11,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 09:22:11,822 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 09:22:11,822 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 09:22:11,823 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 09:22:11,826 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 09:22:11,826 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:22:11" (1/1) ... [2022-12-14 09:22:11,827 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31c9df8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:11, skipping insertion in model container [2022-12-14 09:22:11,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 09:22:11" (1/1) ... [2022-12-14 09:22:11,835 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 09:22:11,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 09:22:11,975 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_2dd58d7f-1e18-4940-95bc-5c51efefbd90/sv-benchmarks/c/array-programs/copysome2-1.i[804,817] [2022-12-14 09:22:11,991 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:22:11,999 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 09:22:12,011 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_2dd58d7f-1e18-4940-95bc-5c51efefbd90/sv-benchmarks/c/array-programs/copysome2-1.i[804,817] [2022-12-14 09:22:12,019 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 09:22:12,032 INFO L208 MainTranslator]: Completed translation [2022-12-14 09:22:12,033 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:12 WrapperNode [2022-12-14 09:22:12,033 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 09:22:12,034 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 09:22:12,034 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 09:22:12,034 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 09:22:12,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:12" (1/1) ... [2022-12-14 09:22:12,049 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:12" (1/1) ... [2022-12-14 09:22:12,069 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 92 [2022-12-14 09:22:12,069 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 09:22:12,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 09:22:12,070 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 09:22:12,070 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 09:22:12,079 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:12" (1/1) ... [2022-12-14 09:22:12,079 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:12" (1/1) ... [2022-12-14 09:22:12,082 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:12" (1/1) ... [2022-12-14 09:22:12,082 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:12" (1/1) ... [2022-12-14 09:22:12,087 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:12" (1/1) ... [2022-12-14 09:22:12,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:12" (1/1) ... [2022-12-14 09:22:12,092 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:12" (1/1) ... [2022-12-14 09:22:12,093 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:12" (1/1) ... [2022-12-14 09:22:12,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 09:22:12,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 09:22:12,096 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 09:22:12,096 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 09:22:12,097 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:12" (1/1) ... [2022-12-14 09:22:12,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 09:22:12,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:22:12,124 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 09:22:12,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 09:22:12,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 09:22:12,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 09:22:12,155 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 09:22:12,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 09:22:12,155 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 09:22:12,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 09:22:12,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 09:22:12,156 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 09:22:12,216 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 09:22:12,218 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 09:22:12,332 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 09:22:12,373 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 09:22:12,373 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-14 09:22:12,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:22:12 BoogieIcfgContainer [2022-12-14 09:22:12,375 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 09:22:12,377 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 09:22:12,377 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 09:22:12,380 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 09:22:12,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 09:22:11" (1/3) ... [2022-12-14 09:22:12,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@172fb97e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:22:12, skipping insertion in model container [2022-12-14 09:22:12,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 09:22:12" (2/3) ... [2022-12-14 09:22:12,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@172fb97e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 09:22:12, skipping insertion in model container [2022-12-14 09:22:12,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 09:22:12" (3/3) ... [2022-12-14 09:22:12,383 INFO L112 eAbstractionObserver]: Analyzing ICFG copysome2-1.i [2022-12-14 09:22:12,397 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 09:22:12,397 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 09:22:12,432 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 09:22:12,437 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;@54329b10, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 09:22:12,437 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 09:22:12,440 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 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 09:22:12,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 09:22:12,445 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:12,445 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:22:12,446 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:22:12,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:12,450 INFO L85 PathProgramCache]: Analyzing trace with hash 904902092, now seen corresponding path program 1 times [2022-12-14 09:22:12,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:22:12,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915949782] [2022-12-14 09:22:12,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:12,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:22:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:12,606 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 09:22:12,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:22:12,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915949782] [2022-12-14 09:22:12,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915949782] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 09:22:12,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 09:22:12,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 09:22:12,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857743176] [2022-12-14 09:22:12,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 09:22:12,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 09:22:12,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:22:12,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 09:22:12,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:22:12,657 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 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 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 09:22:12,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:22:12,702 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2022-12-14 09:22:12,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 09:22:12,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 09:22:12,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:22:12,712 INFO L225 Difference]: With dead ends: 21 [2022-12-14 09:22:12,712 INFO L226 Difference]: Without dead ends: 12 [2022-12-14 09:22:12,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 09:22:12,718 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:22:12,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:22:12,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-12-14 09:22:12,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-12-14 09:22:12,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:12,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2022-12-14 09:22:12,744 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 7 [2022-12-14 09:22:12,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:22:12,744 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2022-12-14 09:22:12,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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 09:22:12,745 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2022-12-14 09:22:12,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 09:22:12,745 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:12,746 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:22:12,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 09:22:12,746 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:22:12,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:12,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1842715167, now seen corresponding path program 1 times [2022-12-14 09:22:12,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:22:12,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580453278] [2022-12-14 09:22:12,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:12,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:22:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 09:22:12,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:22:12,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580453278] [2022-12-14 09:22:12,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580453278] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:22:12,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127386726] [2022-12-14 09:22:12,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:12,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:22:12,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:22:12,860 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:22:12,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 09:22:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:12,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 09:22:12,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:12,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 09:22:12,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:22:12,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 09:22:12,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127386726] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:22:12,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1373645446] [2022-12-14 09:22:13,009 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 09:22:13,009 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:22:13,012 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:22:13,017 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:22:13,017 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:22:13,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:13,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:13,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:13,156 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-12-14 09:22:13,157 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-12-14 09:22:13,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:13,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:13,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:13,182 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-12-14 09:22:13,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:13,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:13,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:13,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 42 [2022-12-14 09:22:13,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:13,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:13,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:13,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:13,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:13,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:13,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:13,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:13,508 INFO L321 Elim1Store]: treesize reduction 585, result has 10.8 percent of original size [2022-12-14 09:22:13,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 422 treesize of output 377 [2022-12-14 09:22:14,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:14,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:14,275 INFO L321 Elim1Store]: treesize reduction 54, result has 40.0 percent of original size [2022-12-14 09:22:14,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 48 [2022-12-14 09:22:14,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:14,311 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 09:22:14,311 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 25 treesize of output 25 [2022-12-14 09:22:14,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:14,347 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 09:22:14,348 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 25 treesize of output 25 [2022-12-14 09:22:14,381 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 09:22:14,381 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 15 treesize of output 15 [2022-12-14 09:22:14,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:14,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:14,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:14,567 INFO L321 Elim1Store]: treesize reduction 231, result has 34.6 percent of original size [2022-12-14 09:22:14,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 127 treesize of output 228 [2022-12-14 09:22:14,844 INFO L321 Elim1Store]: treesize reduction 29, result has 3.3 percent of original size [2022-12-14 09:22:14,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 1161 treesize of output 1119 [2022-12-14 09:22:14,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:14,868 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 1096 treesize of output 1029 [2022-12-14 09:22:15,365 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:22:15,954 INFO L321 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-12-14 09:22:15,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 37 [2022-12-14 09:22:15,974 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:22:16,169 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:22:16,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:16,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2022-12-14 09:22:16,210 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:22:16,229 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:22:16,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:16,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 25 [2022-12-14 09:22:16,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:16,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2022-12-14 09:22:16,446 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 39 treesize of output 25 [2022-12-14 09:22:16,468 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 19 treesize of output 12 [2022-12-14 09:22:16,494 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:22:16,511 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:22:16,609 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:22:16,634 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:22:16,657 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:22:17,029 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:22:17,037 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:22:17,049 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:22:17,062 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:22:17,069 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:22:17,076 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:22:17,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:17,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 54 [2022-12-14 09:22:17,647 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:22:17,671 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:22:17,697 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:22:17,708 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:22:17,725 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:22:17,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:17,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 42 [2022-12-14 09:22:17,801 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:22:17,819 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:22:17,843 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:22:17,878 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:22:19,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:19,071 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 09:22:19,071 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 25 treesize of output 25 [2022-12-14 09:22:19,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:19,087 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 09:22:19,087 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 25 treesize of output 25 [2022-12-14 09:22:19,100 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:22:19,244 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '127#(and (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 200000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) (+ |ULTIMATE.start_main_~#a3~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= 150000 |ULTIMATE.start_main_~z~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-12-14 09:22:19,244 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:22:19,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:22:19,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 09:22:19,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884271524] [2022-12-14 09:22:19,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:22:19,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 09:22:19,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:22:19,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 09:22:19,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:22:19,247 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:19,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:22:19,293 INFO L93 Difference]: Finished difference Result 30 states and 44 transitions. [2022-12-14 09:22:19,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 09:22:19,294 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-12-14 09:22:19,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:22:19,294 INFO L225 Difference]: With dead ends: 30 [2022-12-14 09:22:19,294 INFO L226 Difference]: Without dead ends: 21 [2022-12-14 09:22:19,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-14 09:22:19,296 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 09:22:19,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 09:22:19,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-12-14 09:22:19,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-12-14 09:22:19,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 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 09:22:19,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-12-14 09:22:19,301 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 10 [2022-12-14 09:22:19,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:22:19,302 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-12-14 09:22:19,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 09:22:19,302 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-12-14 09:22:19,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 09:22:19,303 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:19,303 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:22:19,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 09:22:19,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:22:19,504 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:22:19,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:19,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1262196212, now seen corresponding path program 2 times [2022-12-14 09:22:19,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:22:19,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158102948] [2022-12-14 09:22:19,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:19,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:22:19,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:19,790 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 09:22:19,790 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:22:19,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158102948] [2022-12-14 09:22:19,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158102948] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:22:19,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28080971] [2022-12-14 09:22:19,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:22:19,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:22:19,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:22:19,792 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:22:19,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 09:22:19,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 09:22:19,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:22:19,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 09:22:19,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:19,910 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 09:22:19,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:22:19,952 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 09:22:19,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28080971] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:22:19,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1020319032] [2022-12-14 09:22:19,954 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 09:22:19,955 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:22:19,955 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:22:19,955 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:22:19,955 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:22:19,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:19,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:19,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:20,015 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-12-14 09:22:20,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-12-14 09:22:20,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:20,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:20,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:20,073 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-12-14 09:22:20,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-12-14 09:22:20,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:20,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:20,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:20,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 42 [2022-12-14 09:22:20,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:20,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:20,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:20,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:20,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:20,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:20,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:20,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:20,289 INFO L321 Elim1Store]: treesize reduction 585, result has 10.8 percent of original size [2022-12-14 09:22:20,289 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 15 case distinctions, treesize of input 422 treesize of output 377 [2022-12-14 09:22:20,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:20,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:20,757 INFO L321 Elim1Store]: treesize reduction 54, result has 40.0 percent of original size [2022-12-14 09:22:20,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 48 [2022-12-14 09:22:20,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:20,782 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 09:22:20,782 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 25 treesize of output 25 [2022-12-14 09:22:20,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:20,808 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 09:22:20,808 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 25 treesize of output 25 [2022-12-14 09:22:20,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:20,834 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 09:22:20,835 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 25 treesize of output 25 [2022-12-14 09:22:20,838 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:22:20,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:20,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:20,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:20,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:20,889 INFO L321 Elim1Store]: treesize reduction 116, result has 22.1 percent of original size [2022-12-14 09:22:20,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 143 treesize of output 193 [2022-12-14 09:22:21,002 INFO L321 Elim1Store]: treesize reduction 32, result has 52.2 percent of original size [2022-12-14 09:22:21,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 170 treesize of output 184 [2022-12-14 09:22:21,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:21,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:21,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 122 [2022-12-14 09:22:21,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:21,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:21,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:21,047 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:21,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 155 treesize of output 110 [2022-12-14 09:22:21,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:21,100 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 09:22:21,101 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 25 treesize of output 25 [2022-12-14 09:22:21,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:21,115 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 09:22:21,115 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 25 treesize of output 25 [2022-12-14 09:22:21,126 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:22:21,264 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '340#(and (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 200000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) (+ |ULTIMATE.start_main_~#a3~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= 150000 |ULTIMATE.start_main_~z~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-12-14 09:22:21,264 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:22:21,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:22:21,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-14 09:22:21,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850508223] [2022-12-14 09:22:21,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:22:21,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 09:22:21,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:22:21,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 09:22:21,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-12-14 09:22:21,265 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 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 09:22:21,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:22:21,327 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2022-12-14 09:22:21,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 09:22:21,327 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 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 19 [2022-12-14 09:22:21,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:22:21,328 INFO L225 Difference]: With dead ends: 54 [2022-12-14 09:22:21,328 INFO L226 Difference]: Without dead ends: 39 [2022-12-14 09:22:21,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-12-14 09:22:21,329 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:22:21,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:22:21,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-12-14 09:22:21,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-12-14 09:22:21,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 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 09:22:21,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-12-14 09:22:21,333 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 19 [2022-12-14 09:22:21,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:22:21,333 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-12-14 09:22:21,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 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 09:22:21,333 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-12-14 09:22:21,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-12-14 09:22:21,333 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:21,333 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:22:21,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 09:22:21,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:22:21,535 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:22:21,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:21,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1863011220, now seen corresponding path program 3 times [2022-12-14 09:22:21,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:22:21,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174447474] [2022-12-14 09:22:21,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:21,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:22:21,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-12-14 09:22:21,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:22:21,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174447474] [2022-12-14 09:22:21,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174447474] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:22:21,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435429166] [2022-12-14 09:22:21,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 09:22:21,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:22:21,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:22:21,855 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:22:21,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 09:22:21,994 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 09:22:21,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 09:22:21,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 09:22:21,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:22,019 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-12-14 09:22:22,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:22:22,132 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-12-14 09:22:22,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435429166] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:22:22,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1370327034] [2022-12-14 09:22:22,134 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 09:22:22,134 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:22:22,134 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:22:22,134 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:22:22,135 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:22:22,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:22,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:22,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:22,181 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-12-14 09:22:22,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-12-14 09:22:22,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:22,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:22,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:22,241 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-12-14 09:22:22,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-12-14 09:22:22,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:22,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:22,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:22,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 57 [2022-12-14 09:22:22,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:22,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:22,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:22,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:22,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:22,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:22,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:22,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:22,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:22,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:22,338 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:22,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:22,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:22,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:22,385 INFO L321 Elim1Store]: treesize reduction 264, result has 10.8 percent of original size [2022-12-14 09:22:22,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 452 treesize of output 374 [2022-12-14 09:22:22,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:22,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:22,478 INFO L321 Elim1Store]: treesize reduction 54, result has 40.0 percent of original size [2022-12-14 09:22:22,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 48 [2022-12-14 09:22:22,498 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 09:22:22,498 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 15 treesize of output 15 [2022-12-14 09:22:22,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:22,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:22,564 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 09:22:22,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-12-14 09:22:22,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:22,609 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 09:22:22,610 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 25 treesize of output 25 [2022-12-14 09:22:22,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:22,629 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 09:22:22,629 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 25 treesize of output 25 [2022-12-14 09:22:22,633 WARN L207 Elim1Store]: Array PQE input equivalent to false [2022-12-14 09:22:22,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:22,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:22,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:22,680 INFO L321 Elim1Store]: treesize reduction 112, result has 24.8 percent of original size [2022-12-14 09:22:22,681 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 143 treesize of output 197 [2022-12-14 09:22:22,734 INFO L321 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2022-12-14 09:22:22,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 174 treesize of output 171 [2022-12-14 09:22:22,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:22,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:22,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 154 treesize of output 109 [2022-12-14 09:22:22,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 137 treesize of output 109 [2022-12-14 09:22:22,843 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:22,850 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 09:22:22,850 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 25 treesize of output 25 [2022-12-14 09:22:22,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:22,863 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 09:22:22,863 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 25 treesize of output 25 [2022-12-14 09:22:22,874 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:22:22,988 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '757#(and (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 200000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) (+ |ULTIMATE.start_main_~#a3~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= 150000 |ULTIMATE.start_main_~z~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-12-14 09:22:22,988 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:22:22,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:22:22,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-14 09:22:22,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338528104] [2022-12-14 09:22:22,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:22:22,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 09:22:22,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:22:22,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 09:22:22,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2022-12-14 09:22:22,991 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 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 09:22:23,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:22:23,153 INFO L93 Difference]: Finished difference Result 102 states and 143 transitions. [2022-12-14 09:22:23,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 09:22:23,154 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 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 37 [2022-12-14 09:22:23,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:22:23,155 INFO L225 Difference]: With dead ends: 102 [2022-12-14 09:22:23,155 INFO L226 Difference]: Without dead ends: 75 [2022-12-14 09:22:23,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2022-12-14 09:22:23,156 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 09:22:23,156 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 09:22:23,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-14 09:22:23,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-12-14 09:22:23,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 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 09:22:23,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-12-14 09:22:23,164 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 37 [2022-12-14 09:22:23,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:22:23,164 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-12-14 09:22:23,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 24 states have internal predecessors, (33), 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 09:22:23,164 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-12-14 09:22:23,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-12-14 09:22:23,166 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:23,166 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:22:23,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 09:22:23,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:22:23,367 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:22:23,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:23,368 INFO L85 PathProgramCache]: Analyzing trace with hash -60677844, now seen corresponding path program 4 times [2022-12-14 09:22:23,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:22:23,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673525951] [2022-12-14 09:22:23,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:23,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:22:23,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:24,247 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-12-14 09:22:24,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:22:24,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673525951] [2022-12-14 09:22:24,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673525951] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:22:24,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581062213] [2022-12-14 09:22:24,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 09:22:24,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:22:24,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:22:24,249 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:22:24,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 09:22:24,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:24,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 1140 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 09:22:24,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 09:22:24,531 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-12-14 09:22:24,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 09:22:25,061 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-12-14 09:22:25,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581062213] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 09:22:25,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [324667346] [2022-12-14 09:22:25,063 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-12-14 09:22:25,063 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 09:22:25,064 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 09:22:25,064 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 09:22:25,064 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 09:22:25,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:25,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:25,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:25,119 INFO L321 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-12-14 09:22:25,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-12-14 09:22:25,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:25,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:25,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:25,178 INFO L321 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-12-14 09:22:25,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-12-14 09:22:25,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:25,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:25,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:25,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 57 [2022-12-14 09:22:25,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:25,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:25,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:25,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:25,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:25,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:25,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:25,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:25,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:25,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:25,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:25,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:25,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:25,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:25,334 INFO L321 Elim1Store]: treesize reduction 264, result has 10.8 percent of original size [2022-12-14 09:22:25,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 452 treesize of output 374 [2022-12-14 09:22:25,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:25,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:25,425 INFO L321 Elim1Store]: treesize reduction 54, result has 40.0 percent of original size [2022-12-14 09:22:25,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 48 [2022-12-14 09:22:25,450 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 09:22:25,450 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 15 treesize of output 15 [2022-12-14 09:22:25,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:25,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:25,524 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 09:22:25,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-12-14 09:22:25,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:25,596 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 09:22:25,597 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 25 treesize of output 25 [2022-12-14 09:22:25,616 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 09:22:25,616 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 15 treesize of output 15 [2022-12-14 09:22:25,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:25,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:25,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:25,726 INFO L321 Elim1Store]: treesize reduction 261, result has 26.1 percent of original size [2022-12-14 09:22:25,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 127 treesize of output 198 [2022-12-14 09:22:25,822 INFO L321 Elim1Store]: treesize reduction 12, result has 60.0 percent of original size [2022-12-14 09:22:25,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 343 treesize of output 338 [2022-12-14 09:22:25,845 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 09:22:25,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 297 treesize of output 298 [2022-12-14 09:22:25,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:25,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 09:22:25,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:25,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 602 treesize of output 546 [2022-12-14 09:22:26,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:26,646 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 09:22:26,646 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 25 treesize of output 25 [2022-12-14 09:22:26,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 09:22:26,658 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 09:22:26,658 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 25 treesize of output 25 [2022-12-14 09:22:26,668 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 09:22:26,818 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1582#(and (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 200000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_#t~mem11#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a3~0#1.base|) (+ |ULTIMATE.start_main_~#a3~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem12#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= 150000 |ULTIMATE.start_main_~z~0#1|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem12#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0)) (= |#NULL.base| 0))' at error location [2022-12-14 09:22:26,818 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 09:22:26,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 09:22:26,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-12-14 09:22:26,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913050422] [2022-12-14 09:22:26,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 09:22:26,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-14 09:22:26,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 09:22:26,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-14 09:22:26,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 09:22:26,822 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 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 09:22:27,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 09:22:27,182 INFO L93 Difference]: Finished difference Result 198 states and 275 transitions. [2022-12-14 09:22:27,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 09:22:27,182 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 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 73 [2022-12-14 09:22:27,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 09:22:27,184 INFO L225 Difference]: With dead ends: 198 [2022-12-14 09:22:27,184 INFO L226 Difference]: Without dead ends: 147 [2022-12-14 09:22:27,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 09:22:27,185 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 09:22:27,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 09:22:27,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-12-14 09:22:27,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-12-14 09:22:27,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 146 states have internal predecessors, (150), 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 09:22:27,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 150 transitions. [2022-12-14 09:22:27,193 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 150 transitions. Word has length 73 [2022-12-14 09:22:27,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 09:22:27,193 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 150 transitions. [2022-12-14 09:22:27,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 48 states have internal predecessors, (57), 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 09:22:27,193 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 150 transitions. [2022-12-14 09:22:27,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-12-14 09:22:27,194 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 09:22:27,195 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 09:22:27,200 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 09:22:27,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:22:27,396 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 09:22:27,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 09:22:27,398 INFO L85 PathProgramCache]: Analyzing trace with hash -186099028, now seen corresponding path program 5 times [2022-12-14 09:22:27,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 09:22:27,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583336795] [2022-12-14 09:22:27,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 09:22:27,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 09:22:27,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 09:22:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2022-12-14 09:22:30,100 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 09:22:30,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583336795] [2022-12-14 09:22:30,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583336795] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 09:22:30,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620802480] [2022-12-14 09:22:30,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 09:22:30,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 09:22:30,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 09:22:30,101 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 09:22:30,102 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2dd58d7f-1e18-4940-95bc-5c51efefbd90/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process