./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy8_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy8_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 675f35e66fa59545cd4a52408711c9386973ccbbb0528c29e7af26cf7aa65f50 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 14:11:21,742 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:11:21,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:11:21,788 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:11:21,792 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:11:21,794 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:11:21,797 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:11:21,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:11:21,803 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:11:21,805 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:11:21,807 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:11:21,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:11:21,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:11:21,816 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:11:21,817 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:11:21,819 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:11:21,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:11:21,823 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:11:21,825 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:11:21,828 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:11:21,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:11:21,834 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:11:21,835 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:11:21,836 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:11:21,847 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:11:21,850 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:11:21,850 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:11:21,851 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:11:21,853 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:11:21,854 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:11:21,855 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:11:21,856 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:11:21,858 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:11:21,859 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:11:21,862 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:11:21,862 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:11:21,863 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:11:21,863 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:11:21,863 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:11:21,864 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:11:21,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:11:21,866 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:11:21,897 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:11:21,898 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:11:21,898 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:11:21,899 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:11:21,900 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:11:21,900 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:11:21,900 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:11:21,900 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:11:21,900 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:11:21,901 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:11:21,902 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:11:21,902 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:11:21,902 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:11:21,902 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:11:21,903 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:11:21,903 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:11:21,903 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:11:21,903 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:11:21,904 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:11:21,904 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:11:21,905 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:11:21,905 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:11:21,905 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:11:21,905 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:11:21,905 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:11:21,906 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:11:21,906 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:11:21,906 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:11:21,906 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:11:21,906 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:11:21,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:11:21,907 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:11:21,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:11:21,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:11:21,908 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:11:21,908 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:11:21,908 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:11:21,908 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:11:21,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:11:21,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:11:21,909 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:11:21,909 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_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 675f35e66fa59545cd4a52408711c9386973ccbbb0528c29e7af26cf7aa65f50 [2022-11-23 14:11:22,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:11:22,178 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:11:22,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:11:22,182 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:11:22,183 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:11:22,184 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/array-examples/standard_copy8_ground-2.i [2022-11-23 14:11:25,331 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:11:25,586 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:11:25,587 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/sv-benchmarks/c/array-examples/standard_copy8_ground-2.i [2022-11-23 14:11:25,594 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/data/2ba25af24/2b01eee274bd4880a5d4975c3e60e008/FLAG00828f3bf [2022-11-23 14:11:25,615 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/data/2ba25af24/2b01eee274bd4880a5d4975c3e60e008 [2022-11-23 14:11:25,621 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:11:25,623 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:11:25,629 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:11:25,629 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:11:25,633 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:11:25,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:11:25" (1/1) ... [2022-11-23 14:11:25,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2af4ed51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:25, skipping insertion in model container [2022-11-23 14:11:25,636 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:11:25" (1/1) ... [2022-11-23 14:11:25,643 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:11:25,664 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:11:25,797 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_e0169da1-7cfc-4f49-ac3c-a39576f40480/sv-benchmarks/c/array-examples/standard_copy8_ground-2.i[816,829] [2022-11-23 14:11:25,820 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:11:25,834 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:11:25,849 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_e0169da1-7cfc-4f49-ac3c-a39576f40480/sv-benchmarks/c/array-examples/standard_copy8_ground-2.i[816,829] [2022-11-23 14:11:25,868 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:11:25,888 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:11:25,889 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:25 WrapperNode [2022-11-23 14:11:25,889 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:11:25,890 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:11:25,891 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:11:25,891 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:11:25,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:25" (1/1) ... [2022-11-23 14:11:25,906 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:25" (1/1) ... [2022-11-23 14:11:25,929 INFO L138 Inliner]: procedures = 16, calls = 54, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 179 [2022-11-23 14:11:25,930 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:11:25,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:11:25,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:11:25,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:11:25,940 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:25" (1/1) ... [2022-11-23 14:11:25,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:25" (1/1) ... [2022-11-23 14:11:25,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:25" (1/1) ... [2022-11-23 14:11:25,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:25" (1/1) ... [2022-11-23 14:11:25,950 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:25" (1/1) ... [2022-11-23 14:11:25,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:25" (1/1) ... [2022-11-23 14:11:25,957 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:25" (1/1) ... [2022-11-23 14:11:25,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:25" (1/1) ... [2022-11-23 14:11:25,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:11:25,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:11:25,963 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:11:25,964 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:11:25,964 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:25" (1/1) ... [2022-11-23 14:11:25,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:11:25,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:11:25,998 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:11:26,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:11:26,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:11:26,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:11:26,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:11:26,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:11:26,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:11:26,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:11:26,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:11:26,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:11:26,119 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:11:26,122 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:11:26,430 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:11:26,547 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:11:26,547 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-23 14:11:26,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:11:26 BoogieIcfgContainer [2022-11-23 14:11:26,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:11:26,561 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:11:26,561 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:11:26,565 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:11:26,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:11:25" (1/3) ... [2022-11-23 14:11:26,566 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b3688da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:11:26, skipping insertion in model container [2022-11-23 14:11:26,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:11:25" (2/3) ... [2022-11-23 14:11:26,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b3688da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:11:26, skipping insertion in model container [2022-11-23 14:11:26,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:11:26" (3/3) ... [2022-11-23 14:11:26,568 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy8_ground-2.i [2022-11-23 14:11:26,595 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:11:26,595 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:11:26,642 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:11:26,650 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;@225a959d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:11:26,650 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:11:26,660 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:11:26,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 14:11:26,666 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:26,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:26,667 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:11:26,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:26,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1416400191, now seen corresponding path program 1 times [2022-11-23 14:11:26,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:11:26,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315913401] [2022-11-23 14:11:26,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:26,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:11:26,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:11:27,073 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:11:27,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315913401] [2022-11-23 14:11:27,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315913401] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:11:27,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:11:27,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:11:27,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463382919] [2022-11-23 14:11:27,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:11:27,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:11:27,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:11:27,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:11:27,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:11:27,112 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 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 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:11:27,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:27,213 INFO L93 Difference]: Finished difference Result 31 states and 51 transitions. [2022-11-23 14:11:27,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:11:27,216 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-23 14:11:27,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:27,224 INFO L225 Difference]: With dead ends: 31 [2022-11-23 14:11:27,225 INFO L226 Difference]: Without dead ends: 16 [2022-11-23 14:11:27,227 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 [2022-11-23 14:11:27,240 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:27,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:11:27,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-11-23 14:11:27,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-11-23 14:11:27,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:11:27,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 25 transitions. [2022-11-23 14:11:27,291 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 25 transitions. Word has length 13 [2022-11-23 14:11:27,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:27,293 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 25 transitions. [2022-11-23 14:11:27,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:11:27,294 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 25 transitions. [2022-11-23 14:11:27,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 14:11:27,295 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:27,297 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:27,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:11:27,298 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:11:27,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:27,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1959779971, now seen corresponding path program 1 times [2022-11-23 14:11:27,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:11:27,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955385016] [2022-11-23 14:11:27,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:27,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:11:27,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:27,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:11:27,563 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:11:27,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955385016] [2022-11-23 14:11:27,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955385016] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:11:27,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73161302] [2022-11-23 14:11:27,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:27,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:11:27,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:11:27,571 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:11:27,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:11:27,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:27,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-23 14:11:27,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:27,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 14:11:27,840 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 14:11:27,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73161302] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:11:27,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-23 14:11:27,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-23 14:11:27,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068071380] [2022-11-23 14:11:27,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:11:27,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:11:27,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:11:27,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:11:27,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:11:27,857 INFO L87 Difference]: Start difference. First operand 16 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:11:27,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:27,941 INFO L93 Difference]: Finished difference Result 36 states and 60 transitions. [2022-11-23 14:11:27,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:11:27,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 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) Word has length 14 [2022-11-23 14:11:27,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:27,942 INFO L225 Difference]: With dead ends: 36 [2022-11-23 14:11:27,942 INFO L226 Difference]: Without dead ends: 24 [2022-11-23 14:11:27,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 14:11:27,944 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:27,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:11:27,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-23 14:11:27,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-23 14:11:27,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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) [2022-11-23 14:11:27,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2022-11-23 14:11:27,951 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 14 [2022-11-23 14:11:27,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:27,952 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2022-11-23 14:11:27,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:11:27,952 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2022-11-23 14:11:27,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-23 14:11:27,953 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:27,953 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:27,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:11:28,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:11:28,160 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:11:28,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:28,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1111026535, now seen corresponding path program 1 times [2022-11-23 14:11:28,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:11:28,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799653656] [2022-11-23 14:11:28,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:28,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:11:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:28,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:11:28,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:11:28,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799653656] [2022-11-23 14:11:28,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799653656] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:11:28,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023092253] [2022-11-23 14:11:28,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:28,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:11:28,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:11:28,290 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:11:28,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:11:28,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:28,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:11:28,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:28,494 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:11:28,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:11:28,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-11-23 14:11:28,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023092253] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:11:28,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2120743594] [2022-11-23 14:11:28,537 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-23 14:11:28,538 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:11:28,541 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:11:28,547 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:11:28,547 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:11:28,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:28,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:28,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:28,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:28,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:28,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:28,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:28,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:28,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:29,379 INFO L321 Elim1Store]: treesize reduction 926, result has 7.4 percent of original size [2022-11-23 14:11:29,380 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 9 case distinctions, treesize of input 41 treesize of output 90 [2022-11-23 14:11:29,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:29,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:29,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:29,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:29,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:29,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:29,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:29,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:29,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,436 INFO L321 Elim1Store]: treesize reduction 1278, result has 6.0 percent of original size [2022-11-23 14:11:30,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 62 case distinctions, treesize of input 235 treesize of output 277 [2022-11-23 14:11:30,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:30,706 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 22 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-23 14:11:31,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:31,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:31,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:31,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:31,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:31,701 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 14:11:31,702 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 900 treesize of output 890 [2022-11-23 14:11:34,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:34,170 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 14:11:34,170 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 14:11:34,218 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:11:34,218 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 [2022-11-23 14:11:34,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:34,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:34,322 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:11:34,323 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 112 treesize of output 131 [2022-11-23 14:11:34,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:34,488 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:34,488 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 [2022-11-23 14:11:34,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:34,528 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:34,528 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 [2022-11-23 14:11:34,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:34,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:34,611 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:11:34,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:11:34,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:34,708 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:34,709 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 [2022-11-23 14:11:34,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:34,772 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:34,775 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 [2022-11-23 14:11:34,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:34,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:34,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:34,849 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:11:34,853 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:11:34,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:34,916 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:34,917 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 [2022-11-23 14:11:34,952 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:11:34,952 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 [2022-11-23 14:11:35,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:35,035 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:35,076 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:11:35,076 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 112 treesize of output 131 [2022-11-23 14:11:35,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:35,188 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:35,188 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 [2022-11-23 14:11:35,228 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:11:35,229 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 [2022-11-23 14:11:35,280 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:35,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:35,328 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:11:35,329 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 112 treesize of output 141 [2022-11-23 14:11:35,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:35,428 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:35,429 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 [2022-11-23 14:11:35,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:35,463 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:35,463 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 [2022-11-23 14:11:35,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:35,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:35,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:35,533 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:11:35,534 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:11:35,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:35,593 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:35,594 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 [2022-11-23 14:11:35,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:35,627 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:35,628 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 [2022-11-23 14:11:35,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:35,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:35,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:35,721 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:11:35,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:11:35,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:35,824 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:35,824 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 [2022-11-23 14:11:35,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:35,885 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:35,887 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 [2022-11-23 14:11:35,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:35,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:35,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:35,954 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:11:35,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:11:36,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:36,021 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:36,023 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 [2022-11-23 14:11:36,047 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:11:36,470 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '383#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem21#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)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem22#1| |ULTIMATE.start_main_#t~mem21#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) (+ |ULTIMATE.start_main_~#a9~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:11:36,470 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:11:36,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:11:36,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-23 14:11:36,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885666930] [2022-11-23 14:11:36,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:11:36,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:11:36,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:11:36,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:11:36,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:11:36,473 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:11:36,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:36,552 INFO L93 Difference]: Finished difference Result 48 states and 68 transitions. [2022-11-23 14:11:36,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:11:36,552 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 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 22 [2022-11-23 14:11:36,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:36,553 INFO L225 Difference]: With dead ends: 48 [2022-11-23 14:11:36,553 INFO L226 Difference]: Without dead ends: 27 [2022-11-23 14:11:36,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:11:36,554 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:36,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:11:36,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-23 14:11:36,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-11-23 14:11:36,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:11:36,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2022-11-23 14:11:36,559 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 22 [2022-11-23 14:11:36,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:36,560 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2022-11-23 14:11:36,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:11:36,560 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2022-11-23 14:11:36,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-11-23 14:11:36,560 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:36,561 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:36,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:11:36,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:11:36,767 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:11:36,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:36,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1068781347, now seen corresponding path program 2 times [2022-11-23 14:11:36,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:11:36,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045009640] [2022-11-23 14:11:36,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:36,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:11:36,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:36,942 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-23 14:11:36,942 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:11:36,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045009640] [2022-11-23 14:11:36,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045009640] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:11:36,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737740006] [2022-11-23 14:11:36,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:11:36,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:11:36,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:11:36,944 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:11:36,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:11:37,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-23 14:11:37,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:11:37,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 14:11:37,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:37,142 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-23 14:11:37,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:11:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-11-23 14:11:37,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737740006] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:11:37,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [128612619] [2022-11-23 14:11:37,161 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-23 14:11:37,161 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:11:37,162 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:11:37,162 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:11:37,162 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:11:37,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:37,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:37,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:37,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:37,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:37,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:37,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:37,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:37,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:38,064 INFO L321 Elim1Store]: treesize reduction 1278, result has 6.0 percent of original size [2022-11-23 14:11:38,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 62 case distinctions, treesize of input 235 treesize of output 277 [2022-11-23 14:11:38,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:38,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:38,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:38,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:38,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:38,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:38,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:38,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:38,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:38,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 64 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 62 [2022-11-23 14:11:38,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:38,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:38,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 22 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-23 14:11:38,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:38,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:38,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:38,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:38,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:38,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:38,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:38,863 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-23 14:11:38,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 920 treesize of output 888 [2022-11-23 14:11:39,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:39,282 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 14:11:39,283 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 14:11:39,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:39,339 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:39,339 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 [2022-11-23 14:11:39,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:39,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:39,395 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:39,411 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:11:39,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:11:39,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:39,483 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:39,483 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 [2022-11-23 14:11:39,518 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:11:39,518 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 [2022-11-23 14:11:39,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:39,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:39,612 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:11:39,612 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 112 treesize of output 131 [2022-11-23 14:11:39,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:39,709 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:39,709 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 [2022-11-23 14:11:39,744 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:11:39,744 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 [2022-11-23 14:11:39,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:39,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:39,855 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:11:39,855 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 112 treesize of output 131 [2022-11-23 14:11:39,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:39,954 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:39,954 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 [2022-11-23 14:11:39,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:39,986 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:39,987 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 [2022-11-23 14:11:40,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:40,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:40,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:40,052 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:11:40,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:11:40,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:40,116 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:40,116 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 [2022-11-23 14:11:40,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:40,149 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:40,149 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 [2022-11-23 14:11:40,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:40,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:40,210 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:11:40,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:11:40,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:40,291 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:40,292 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 [2022-11-23 14:11:40,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:40,347 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:40,348 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 [2022-11-23 14:11:40,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:40,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:40,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:40,414 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:11:40,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:11:40,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:40,471 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:40,471 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 [2022-11-23 14:11:40,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:40,501 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:40,502 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 [2022-11-23 14:11:40,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:40,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:40,579 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:11:40,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:11:40,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:40,663 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:40,664 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 [2022-11-23 14:11:40,731 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:11:40,731 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 [2022-11-23 14:11:40,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:40,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:40,842 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:11:40,843 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 112 treesize of output 131 [2022-11-23 14:11:40,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:40,958 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:40,958 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 [2022-11-23 14:11:40,983 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:11:41,432 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '675#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem21#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)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem22#1| |ULTIMATE.start_main_#t~mem21#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) (+ |ULTIMATE.start_main_~#a9~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:11:41,432 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:11:41,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:11:41,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-23 14:11:41,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714166751] [2022-11-23 14:11:41,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:11:41,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 14:11:41,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:11:41,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 14:11:41,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:11:41,434 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:11:41,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:41,576 INFO L93 Difference]: Finished difference Result 70 states and 110 transitions. [2022-11-23 14:11:41,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 14:11:41,577 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 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 25 [2022-11-23 14:11:41,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:41,578 INFO L225 Difference]: With dead ends: 70 [2022-11-23 14:11:41,578 INFO L226 Difference]: Without dead ends: 51 [2022-11-23 14:11:41,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-11-23 14:11:41,579 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:41,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:11:41,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-11-23 14:11:41,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-11-23 14:11:41,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:11:41,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2022-11-23 14:11:41,587 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 25 [2022-11-23 14:11:41,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:41,587 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2022-11-23 14:11:41,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.428571428571429) internal successors, (38), 7 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:11:41,588 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2022-11-23 14:11:41,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-23 14:11:41,589 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:41,589 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:41,595 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:11:41,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:11:41,795 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:11:41,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:41,796 INFO L85 PathProgramCache]: Analyzing trace with hash -683910209, now seen corresponding path program 3 times [2022-11-23 14:11:41,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:11:41,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820096333] [2022-11-23 14:11:41,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:41,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:11:41,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:42,070 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-23 14:11:42,070 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:11:42,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820096333] [2022-11-23 14:11:42,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820096333] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:11:42,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992767543] [2022-11-23 14:11:42,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:11:42,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:11:42,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:11:42,072 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:11:42,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:11:42,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:11:42,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:11:42,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:11:42,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:42,299 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-23 14:11:42,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:11:42,357 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-23 14:11:42,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992767543] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:11:42,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [878212802] [2022-11-23 14:11:42,370 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-23 14:11:42,370 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:11:42,370 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:11:42,370 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:11:42,370 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:11:42,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:42,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:42,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:42,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:42,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:42,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:42,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:42,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:42,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:42,906 INFO L321 Elim1Store]: treesize reduction 926, result has 7.4 percent of original size [2022-11-23 14:11:42,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 9 case distinctions, treesize of input 41 treesize of output 90 [2022-11-23 14:11:42,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:43,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:43,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:43,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:43,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:43,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:43,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:43,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:43,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:43,789 INFO L321 Elim1Store]: treesize reduction 1278, result has 6.0 percent of original size [2022-11-23 14:11:43,789 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 62 case distinctions, treesize of input 235 treesize of output 277 [2022-11-23 14:11:43,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:43,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:43,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 22 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-23 14:11:44,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:44,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:44,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:44,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:44,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:44,580 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 14:11:44,581 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 900 treesize of output 890 [2022-11-23 14:11:46,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:46,268 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 14:11:46,268 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 14:11:46,305 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:11:46,305 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 [2022-11-23 14:11:46,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:46,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:46,402 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:11:46,403 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 112 treesize of output 131 [2022-11-23 14:11:46,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:46,504 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:46,504 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 [2022-11-23 14:11:46,533 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:11:46,534 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 [2022-11-23 14:11:46,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:46,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:46,627 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:11:46,627 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 112 treesize of output 131 [2022-11-23 14:11:46,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:46,702 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:46,703 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 [2022-11-23 14:11:46,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:46,735 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:46,735 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 [2022-11-23 14:11:46,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:46,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:46,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:46,794 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:11:46,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:11:46,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:46,856 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:46,856 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 [2022-11-23 14:11:46,893 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:11:46,893 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 [2022-11-23 14:11:46,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:46,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:46,995 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:11:46,995 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 112 treesize of output 131 [2022-11-23 14:11:47,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:47,071 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:47,071 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 [2022-11-23 14:11:47,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:47,105 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:47,105 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 [2022-11-23 14:11:47,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:47,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:47,161 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:11:47,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:11:47,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:47,239 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:47,240 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 [2022-11-23 14:11:47,301 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:11:47,301 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 [2022-11-23 14:11:47,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:47,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:47,397 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:11:47,397 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 112 treesize of output 131 [2022-11-23 14:11:47,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:47,471 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:47,471 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 [2022-11-23 14:11:47,507 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:11:47,507 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 [2022-11-23 14:11:47,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:47,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:47,619 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:11:47,620 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 112 treesize of output 131 [2022-11-23 14:11:47,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:47,717 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:47,718 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 [2022-11-23 14:11:47,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:47,750 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:47,751 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 [2022-11-23 14:11:47,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:47,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:47,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:47,813 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:11:47,814 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:11:47,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:47,874 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:47,874 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 [2022-11-23 14:11:47,895 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:11:48,395 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1209#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem21#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)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem22#1| |ULTIMATE.start_main_#t~mem21#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) (+ |ULTIMATE.start_main_~#a9~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:11:48,395 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:11:48,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:11:48,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-23 14:11:48,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438444976] [2022-11-23 14:11:48,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:11:48,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 14:11:48,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:11:48,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 14:11:48,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-23 14:11:48,397 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2022-11-23 14:11:48,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:48,487 INFO L93 Difference]: Finished difference Result 102 states and 125 transitions. [2022-11-23 14:11:48,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:11:48,487 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 49 [2022-11-23 14:11:48,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:48,488 INFO L225 Difference]: With dead ends: 102 [2022-11-23 14:11:48,488 INFO L226 Difference]: Without dead ends: 57 [2022-11-23 14:11:48,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 130 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-11-23 14:11:48,491 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:48,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:11:48,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-11-23 14:11:48,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-11-23 14:11:48,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:11:48,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2022-11-23 14:11:48,499 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 49 [2022-11-23 14:11:48,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:48,500 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2022-11-23 14:11:48,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2022-11-23 14:11:48,500 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2022-11-23 14:11:48,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-11-23 14:11:48,501 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:48,502 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:48,511 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-23 14:11:48,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:11:48,707 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:11:48,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:48,708 INFO L85 PathProgramCache]: Analyzing trace with hash -925125313, now seen corresponding path program 4 times [2022-11-23 14:11:48,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:11:48,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730601036] [2022-11-23 14:11:48,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:48,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:11:48,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:49,232 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-23 14:11:49,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:11:49,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730601036] [2022-11-23 14:11:49,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730601036] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:11:49,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511562642] [2022-11-23 14:11:49,233 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:11:49,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:11:49,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:11:49,235 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:11:49,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:11:49,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:49,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-23 14:11:49,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:49,510 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-23 14:11:49,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:11:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-23 14:11:49,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511562642] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:11:49,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1699580822] [2022-11-23 14:11:49,720 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-23 14:11:49,721 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:11:49,721 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:11:49,721 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:11:49,722 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:11:49,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:49,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:49,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:49,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:49,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:49,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:49,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:49,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:49,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:50,282 INFO L321 Elim1Store]: treesize reduction 926, result has 7.4 percent of original size [2022-11-23 14:11:50,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 9 case distinctions, treesize of input 41 treesize of output 90 [2022-11-23 14:11:50,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:50,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:50,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:50,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:50,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:50,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:50,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:50,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:50,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:51,148 INFO L321 Elim1Store]: treesize reduction 1278, result has 6.0 percent of original size [2022-11-23 14:11:51,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 62 case distinctions, treesize of input 235 treesize of output 277 [2022-11-23 14:11:51,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:51,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:51,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 22 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-23 14:11:51,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:51,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:51,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:51,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:51,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:51,854 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 14:11:51,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 900 treesize of output 890 [2022-11-23 14:11:53,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:53,435 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 14:11:53,436 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 14:11:53,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:53,470 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:53,470 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 [2022-11-23 14:11:53,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:53,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:53,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:53,536 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:11:53,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:11:53,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:53,594 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:53,594 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 [2022-11-23 14:11:53,628 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:11:53,628 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 [2022-11-23 14:11:53,677 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:53,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:53,734 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:11:53,734 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 112 treesize of output 131 [2022-11-23 14:11:53,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:53,807 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:53,807 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 [2022-11-23 14:11:53,840 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:11:53,840 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 [2022-11-23 14:11:53,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:53,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:53,925 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:11:53,925 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 112 treesize of output 141 [2022-11-23 14:11:54,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:54,028 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:54,029 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 [2022-11-23 14:11:54,057 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:11:54,058 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 [2022-11-23 14:11:54,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:54,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:54,163 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:11:54,163 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 112 treesize of output 131 [2022-11-23 14:11:54,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:54,249 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:54,249 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 [2022-11-23 14:11:54,270 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:54,280 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:54,280 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 [2022-11-23 14:11:54,323 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:54,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:54,336 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:11:54,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:11:54,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:54,414 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:54,414 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 [2022-11-23 14:11:54,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:54,474 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:54,475 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 [2022-11-23 14:11:54,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:54,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:54,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:54,530 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:11:54,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:11:54,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:54,586 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:54,587 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 [2022-11-23 14:11:54,643 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:11:54,643 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 [2022-11-23 14:11:54,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:54,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:54,754 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:11:54,754 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 112 treesize of output 131 [2022-11-23 14:11:54,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:54,851 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:54,851 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 [2022-11-23 14:11:54,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:54,886 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:54,886 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 [2022-11-23 14:11:54,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:54,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:54,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:54,946 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:11:54,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:11:54,993 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:55,006 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:11:55,006 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 [2022-11-23 14:11:55,037 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:11:55,610 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1867#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem21#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)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem22#1| |ULTIMATE.start_main_#t~mem21#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) (+ |ULTIMATE.start_main_~#a9~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:11:55,610 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:11:55,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:11:55,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-23 14:11:55,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112243779] [2022-11-23 14:11:55,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:11:55,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 14:11:55,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:11:55,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 14:11:55,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-23 14:11:55,613 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:11:55,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:11:55,713 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2022-11-23 14:11:55,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 14:11:55,714 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 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 55 [2022-11-23 14:11:55,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:11:55,714 INFO L225 Difference]: With dead ends: 114 [2022-11-23 14:11:55,714 INFO L226 Difference]: Without dead ends: 69 [2022-11-23 14:11:55,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 142 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-11-23 14:11:55,716 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:11:55,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:11:55,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-11-23 14:11:55,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-11-23 14:11:55,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.1470588235294117) internal successors, (78), 68 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) [2022-11-23 14:11:55,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2022-11-23 14:11:55,725 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 55 [2022-11-23 14:11:55,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:11:55,726 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2022-11-23 14:11:55,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:11:55,726 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2022-11-23 14:11:55,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-11-23 14:11:55,728 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:11:55,728 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:11:55,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:11:55,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 14:11:55,954 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:11:55,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:11:55,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1898510273, now seen corresponding path program 5 times [2022-11-23 14:11:55,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:11:55,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356625472] [2022-11-23 14:11:55,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:11:55,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:11:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:11:57,110 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-23 14:11:57,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:11:57,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356625472] [2022-11-23 14:11:57,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356625472] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:11:57,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928875306] [2022-11-23 14:11:57,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:11:57,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:11:57,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:11:57,112 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:11:57,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:11:57,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-23 14:11:57,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:11:57,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:11:57,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:11:57,968 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2022-11-23 14:11:57,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:11:58,115 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 323 trivial. 0 not checked. [2022-11-23 14:11:58,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928875306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:11:58,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [657835382] [2022-11-23 14:11:58,118 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-23 14:11:58,119 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:11:58,120 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:11:58,120 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:11:58,120 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:11:58,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:58,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:58,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:58,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:58,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:58,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:58,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:58,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:58,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:59,068 INFO L321 Elim1Store]: treesize reduction 1278, result has 6.0 percent of original size [2022-11-23 14:11:59,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 62 case distinctions, treesize of input 235 treesize of output 277 [2022-11-23 14:11:59,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:59,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:59,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:59,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:59,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:59,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:59,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:59,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:59,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:59,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 64 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 62 [2022-11-23 14:11:59,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:59,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:59,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 22 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-23 14:11:59,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:59,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:11:59,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:59,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:59,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:11:59,721 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 14:11:59,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 900 treesize of output 890 [2022-11-23 14:12:01,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:01,447 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 14:12:01,447 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 14:12:01,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:01,484 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:01,484 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 [2022-11-23 14:12:01,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:01,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:01,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:01,536 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:12:01,536 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:12:01,584 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:01,594 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:01,595 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 [2022-11-23 14:12:01,634 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:01,645 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:01,645 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 [2022-11-23 14:12:01,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:01,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:01,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:01,698 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:12:01,698 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:12:01,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:01,782 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:01,782 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 [2022-11-23 14:12:01,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:01,842 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:01,842 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 [2022-11-23 14:12:01,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:01,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:01,887 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:01,900 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:12:01,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:12:01,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:01,963 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:01,963 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 [2022-11-23 14:12:01,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:01,996 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:01,996 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 [2022-11-23 14:12:02,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:02,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:02,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:02,047 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:12:02,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:12:02,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:02,109 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:02,110 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 [2022-11-23 14:12:02,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:02,143 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:02,143 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 [2022-11-23 14:12:02,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:02,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:02,206 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:12:02,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:12:02,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:02,280 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:02,280 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 [2022-11-23 14:12:02,342 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:12:02,343 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 [2022-11-23 14:12:02,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:02,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:02,442 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:12:02,442 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 112 treesize of output 141 [2022-11-23 14:12:02,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:02,572 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:02,572 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 [2022-11-23 14:12:02,603 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:12:02,603 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 [2022-11-23 14:12:02,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:02,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:02,688 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:12:02,689 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 112 treesize of output 131 [2022-11-23 14:12:02,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:02,756 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:02,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:12:02,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:02,792 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:02,793 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 [2022-11-23 14:12:02,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:02,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:02,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:02,850 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:12:02,851 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:12:02,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:02,907 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:02,907 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 [2022-11-23 14:12:02,944 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:12:04,031 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2655#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem21#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)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem22#1| |ULTIMATE.start_main_#t~mem21#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) (+ |ULTIMATE.start_main_~#a9~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:12:04,032 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:12:04,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:12:04,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2022-11-23 14:12:04,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262296741] [2022-11-23 14:12:04,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:12:04,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-23 14:12:04,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:12:04,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-23 14:12:04,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-23 14:12:04,035 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:12:04,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:04,420 INFO L93 Difference]: Finished difference Result 163 states and 229 transitions. [2022-11-23 14:12:04,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-23 14:12:04,420 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 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 67 [2022-11-23 14:12:04,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:04,422 INFO L225 Difference]: With dead ends: 163 [2022-11-23 14:12:04,422 INFO L226 Difference]: Without dead ends: 118 [2022-11-23 14:12:04,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 175 SyntacticMatches, 10 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-11-23 14:12:04,424 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:04,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:12:04,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-11-23 14:12:04,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-11-23 14:12:04,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0854700854700854) internal successors, (127), 117 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:12:04,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 127 transitions. [2022-11-23 14:12:04,449 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 127 transitions. Word has length 67 [2022-11-23 14:12:04,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:04,449 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 127 transitions. [2022-11-23 14:12:04,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:12:04,453 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 127 transitions. [2022-11-23 14:12:04,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-11-23 14:12:04,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:04,462 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:12:04,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:12:04,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:04,663 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:12:04,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:04,663 INFO L85 PathProgramCache]: Analyzing trace with hash -888773949, now seen corresponding path program 6 times [2022-11-23 14:12:04,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:12:04,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213730470] [2022-11-23 14:12:04,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:04,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:12:04,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:06,047 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2022-11-23 14:12:06,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:12:06,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213730470] [2022-11-23 14:12:06,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213730470] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:12:06,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733019953] [2022-11-23 14:12:06,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:12:06,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:06,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:12:06,050 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:12:06,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:12:06,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:12:06,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:12:06,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 1177 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 14:12:06,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:06,555 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2022-11-23 14:12:06,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:07,501 INFO L134 CoverageAnalysis]: Checked inductivity of 716 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2022-11-23 14:12:07,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733019953] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:12:07,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1908860797] [2022-11-23 14:12:07,504 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-23 14:12:07,504 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:12:07,504 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:12:07,504 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:12:07,504 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:12:07,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:07,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:07,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:07,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:07,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:07,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:07,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:07,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:07,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:08,387 INFO L321 Elim1Store]: treesize reduction 1278, result has 6.0 percent of original size [2022-11-23 14:12:08,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 62 case distinctions, treesize of input 235 treesize of output 277 [2022-11-23 14:12:08,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:08,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:08,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:08,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:08,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:08,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:08,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:08,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:08,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:08,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 64 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 62 [2022-11-23 14:12:08,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:08,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:08,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 22 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-23 14:12:08,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:08,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:08,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:08,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:08,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:08,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:08,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:08,994 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-23 14:12:08,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 920 treesize of output 888 [2022-11-23 14:12:09,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:09,270 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 14:12:09,271 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 14:12:09,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:09,306 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:09,306 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 [2022-11-23 14:12:09,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:09,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:09,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:09,361 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:12:09,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:12:09,406 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:09,420 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:09,421 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 [2022-11-23 14:12:09,452 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:12:09,452 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 [2022-11-23 14:12:09,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:09,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:09,550 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:12:09,550 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 112 treesize of output 141 [2022-11-23 14:12:09,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:09,629 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:09,629 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 [2022-11-23 14:12:09,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:09,661 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:09,661 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 [2022-11-23 14:12:09,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:09,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:09,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:09,749 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:12:09,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:12:09,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:09,802 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:09,803 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 [2022-11-23 14:12:09,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:09,834 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:09,834 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 [2022-11-23 14:12:09,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:09,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:09,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:09,888 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:12:09,888 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:12:09,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:09,940 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:09,940 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 [2022-11-23 14:12:09,972 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:12:09,973 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 [2022-11-23 14:12:10,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:10,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:10,090 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:12:10,090 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 112 treesize of output 141 [2022-11-23 14:12:10,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:10,165 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:10,166 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 [2022-11-23 14:12:10,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:10,198 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:10,199 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 [2022-11-23 14:12:10,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:10,248 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:10,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:10,263 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:12:10,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:12:10,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:10,317 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:10,318 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 [2022-11-23 14:12:10,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:10,345 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:10,345 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 [2022-11-23 14:12:10,382 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:10,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:10,395 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:12:10,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:12:10,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:10,461 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:10,462 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 [2022-11-23 14:12:10,523 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:12:10,523 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 [2022-11-23 14:12:10,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:10,568 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:10,623 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:12:10,623 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 112 treesize of output 131 [2022-11-23 14:12:10,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:10,709 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:10,709 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 [2022-11-23 14:12:10,729 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:12:11,817 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3949#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem21#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)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem22#1| |ULTIMATE.start_main_#t~mem21#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) (+ |ULTIMATE.start_main_~#a9~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:12:11,817 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:12:11,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:12:11,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-11-23 14:12:11,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966417619] [2022-11-23 14:12:11,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:12:11,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-11-23 14:12:11,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:12:11,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-11-23 14:12:11,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-23 14:12:11,821 INFO L87 Difference]: Start difference. First operand 118 states and 127 transitions. Second operand has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 50 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:12:12,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:12,008 INFO L93 Difference]: Finished difference Result 236 states and 278 transitions. [2022-11-23 14:12:12,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-23 14:12:12,009 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 50 states have internal predecessors, (71), 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 116 [2022-11-23 14:12:12,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:12,010 INFO L225 Difference]: With dead ends: 236 [2022-11-23 14:12:12,010 INFO L226 Difference]: Without dead ends: 143 [2022-11-23 14:12:12,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 306 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-11-23 14:12:12,013 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:12,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:12:12,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-23 14:12:12,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-11-23 14:12:12,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0704225352112675) internal successors, (152), 142 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:12:12,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 152 transitions. [2022-11-23 14:12:12,041 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 152 transitions. Word has length 116 [2022-11-23 14:12:12,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:12,044 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 152 transitions. [2022-11-23 14:12:12,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 50 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:12:12,044 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 152 transitions. [2022-11-23 14:12:12,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-11-23 14:12:12,053 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:12,053 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:12:12,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:12:12,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:12,262 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:12:12,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:12,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1186050815, now seen corresponding path program 7 times [2022-11-23 14:12:12,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:12:12,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834581969] [2022-11-23 14:12:12,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:12,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:12:12,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:15,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1616 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2022-11-23 14:12:15,794 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:12:15,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834581969] [2022-11-23 14:12:15,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834581969] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:12:15,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197787788] [2022-11-23 14:12:15,794 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:12:15,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:15,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:12:15,796 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:12:15,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:12:16,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:16,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 1602 conjuncts, 50 conjunts are in the unsatisfiable core [2022-11-23 14:12:16,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:16,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1616 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2022-11-23 14:12:16,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:12:19,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1616 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2022-11-23 14:12:19,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197787788] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:12:19,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [674396840] [2022-11-23 14:12:19,464 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-23 14:12:19,464 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:12:19,465 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:12:19,465 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:12:19,465 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:12:19,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:19,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:19,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:19,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:19,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:19,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:19,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:19,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:19,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:19,971 INFO L321 Elim1Store]: treesize reduction 926, result has 7.4 percent of original size [2022-11-23 14:12:19,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 9 case distinctions, treesize of input 41 treesize of output 90 [2022-11-23 14:12:20,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:20,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:20,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:20,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:20,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:20,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:20,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:20,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:20,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:20,742 INFO L321 Elim1Store]: treesize reduction 1278, result has 6.0 percent of original size [2022-11-23 14:12:20,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 62 case distinctions, treesize of input 235 treesize of output 277 [2022-11-23 14:12:20,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:20,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:20,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 22 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-23 14:12:21,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:21,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:21,230 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:21,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:21,232 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:21,316 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 14:12:21,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 900 treesize of output 890 [2022-11-23 14:12:22,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:22,813 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 14:12:22,815 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 14:12:22,874 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:12:22,875 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 [2022-11-23 14:12:22,920 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:22,921 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:22,961 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:12:22,961 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 112 treesize of output 131 [2022-11-23 14:12:23,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:23,031 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:23,032 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 [2022-11-23 14:12:23,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:23,065 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:23,065 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 [2022-11-23 14:12:23,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:23,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:23,123 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:12:23,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:12:23,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:23,180 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:23,180 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 [2022-11-23 14:12:23,242 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:12:23,242 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 [2022-11-23 14:12:23,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:23,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:23,327 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:12:23,327 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 112 treesize of output 131 [2022-11-23 14:12:23,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:23,428 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:23,429 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 [2022-11-23 14:12:23,463 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:12:23,463 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 [2022-11-23 14:12:23,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:23,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:23,549 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:12:23,549 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 112 treesize of output 131 [2022-11-23 14:12:23,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:23,630 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:23,631 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 [2022-11-23 14:12:23,662 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:12:23,662 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 [2022-11-23 14:12:23,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:23,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:23,761 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:12:23,761 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 112 treesize of output 131 [2022-11-23 14:12:23,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:23,830 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:23,830 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 [2022-11-23 14:12:23,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:23,862 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:23,862 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 [2022-11-23 14:12:23,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:23,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:23,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:23,918 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:12:23,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:12:23,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:23,982 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:23,982 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 [2022-11-23 14:12:24,014 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:12:24,015 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 [2022-11-23 14:12:24,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:24,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:24,102 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:12:24,102 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 112 treesize of output 141 [2022-11-23 14:12:24,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:24,214 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:24,214 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 [2022-11-23 14:12:24,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:24,245 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:24,246 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 [2022-11-23 14:12:24,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:12:24,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:24,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:24,299 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:12:24,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:12:24,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:12:24,357 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:12:24,358 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 [2022-11-23 14:12:24,376 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:12:25,986 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5639#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem21#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)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem22#1| |ULTIMATE.start_main_#t~mem21#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) (+ |ULTIMATE.start_main_~#a9~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:12:25,986 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:12:25,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:12:25,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-11-23 14:12:25,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432826537] [2022-11-23 14:12:25,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:12:25,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-11-23 14:12:25,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:12:25,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-11-23 14:12:25,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-23 14:12:25,993 INFO L87 Difference]: Start difference. First operand 143 states and 152 transitions. Second operand has 101 states, 101 states have (on average 1.198019801980198) internal successors, (121), 100 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:12:26,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:12:26,238 INFO L93 Difference]: Finished difference Result 286 states and 353 transitions. [2022-11-23 14:12:26,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-11-23 14:12:26,239 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.198019801980198) internal successors, (121), 100 states have internal predecessors, (121), 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 141 [2022-11-23 14:12:26,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:12:26,240 INFO L225 Difference]: With dead ends: 286 [2022-11-23 14:12:26,241 INFO L226 Difference]: Without dead ends: 193 [2022-11-23 14:12:26,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 356 SyntacticMatches, 11 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2544 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-11-23 14:12:26,244 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:12:26,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:12:26,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-11-23 14:12:26,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2022-11-23 14:12:26,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.0520833333333333) internal successors, (202), 192 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:12:26,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 202 transitions. [2022-11-23 14:12:26,259 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 202 transitions. Word has length 141 [2022-11-23 14:12:26,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:12:26,260 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 202 transitions. [2022-11-23 14:12:26,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.198019801980198) internal successors, (121), 100 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:12:26,260 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 202 transitions. [2022-11-23 14:12:26,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-11-23 14:12:26,262 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:12:26,263 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:12:26,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 14:12:26,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:26,467 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:12:26,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:12:26,468 INFO L85 PathProgramCache]: Analyzing trace with hash -215865473, now seen corresponding path program 8 times [2022-11-23 14:12:26,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:12:26,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519070712] [2022-11-23 14:12:26,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:12:26,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:12:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:12:36,113 INFO L134 CoverageAnalysis]: Checked inductivity of 5291 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2022-11-23 14:12:36,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:12:36,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519070712] [2022-11-23 14:12:36,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519070712] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:12:36,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883833630] [2022-11-23 14:12:36,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:12:36,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:12:36,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:12:36,115 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:12:36,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 14:12:58,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-23 14:12:58,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:12:58,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 956 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 14:12:58,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:12:59,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5291 backedges. 98 proven. 55 refuted. 0 times theorem prover too weak. 5138 trivial. 0 not checked. [2022-11-23 14:12:59,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:00,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5291 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 5226 trivial. 0 not checked. [2022-11-23 14:13:00,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883833630] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:13:00,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1673606115] [2022-11-23 14:13:00,145 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-23 14:13:00,145 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:13:00,146 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:13:00,146 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:13:00,146 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:13:00,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:00,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:00,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:00,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:00,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:00,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:00,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:00,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:00,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:00,646 INFO L321 Elim1Store]: treesize reduction 926, result has 7.4 percent of original size [2022-11-23 14:13:00,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 9 case distinctions, treesize of input 41 treesize of output 90 [2022-11-23 14:13:00,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:00,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:00,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:00,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:00,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:00,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:00,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:00,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:00,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:01,456 INFO L321 Elim1Store]: treesize reduction 1278, result has 6.0 percent of original size [2022-11-23 14:13:01,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 62 case distinctions, treesize of input 235 treesize of output 277 [2022-11-23 14:13:01,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:01,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:01,613 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 22 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-23 14:13:01,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:01,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:01,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:01,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:01,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:01,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:01,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:02,036 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-23 14:13:02,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 920 treesize of output 888 [2022-11-23 14:13:02,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:02,314 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 14:13:02,314 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 14:13:02,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:02,371 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:02,371 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 [2022-11-23 14:13:02,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:02,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:02,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:02,429 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:13:02,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:13:02,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:02,489 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:02,490 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 [2022-11-23 14:13:02,518 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:13:02,518 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 [2022-11-23 14:13:02,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:02,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:02,614 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:13:02,614 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 112 treesize of output 131 [2022-11-23 14:13:02,703 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:02,713 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:02,714 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 [2022-11-23 14:13:02,742 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:13:02,742 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 [2022-11-23 14:13:02,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:02,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:02,841 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:13:02,841 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 112 treesize of output 131 [2022-11-23 14:13:02,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:02,907 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:02,908 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 [2022-11-23 14:13:02,936 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:13:02,937 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 [2022-11-23 14:13:02,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:02,987 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:03,028 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:13:03,029 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 112 treesize of output 131 [2022-11-23 14:13:03,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:03,109 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:03,110 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 [2022-11-23 14:13:03,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:03,140 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:03,140 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 [2022-11-23 14:13:03,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:03,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:03,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:03,200 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:13:03,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:13:03,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:03,274 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:03,275 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 [2022-11-23 14:13:03,326 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:13:03,326 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 [2022-11-23 14:13:03,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:03,365 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:03,408 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:13:03,408 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 112 treesize of output 141 [2022-11-23 14:13:03,482 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:03,493 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:03,493 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 [2022-11-23 14:13:03,522 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:13:03,523 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 [2022-11-23 14:13:03,561 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:03,562 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:03,621 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:13:03,621 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 112 treesize of output 141 [2022-11-23 14:13:03,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:03,772 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:03,773 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 [2022-11-23 14:13:03,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:03,803 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:03,803 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 [2022-11-23 14:13:03,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:03,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:03,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:03,854 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:13:03,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:13:03,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:03,910 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:03,910 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 [2022-11-23 14:13:03,930 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:13:06,751 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7852#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem21#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)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem22#1| |ULTIMATE.start_main_#t~mem21#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) (+ |ULTIMATE.start_main_~#a9~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:13:06,751 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:13:06,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:13:06,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 14, 13] total 124 [2022-11-23 14:13:06,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162876625] [2022-11-23 14:13:06,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:13:06,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-11-23 14:13:06,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:13:06,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-11-23 14:13:06,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5446, Invalid=11066, Unknown=0, NotChecked=0, Total=16512 [2022-11-23 14:13:06,758 INFO L87 Difference]: Start difference. First operand 193 states and 202 transitions. Second operand has 124 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 124 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:13:08,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:13:08,800 INFO L93 Difference]: Finished difference Result 383 states and 497 transitions. [2022-11-23 14:13:08,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-11-23 14:13:08,800 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 124 states have internal predecessors, (148), 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 191 [2022-11-23 14:13:08,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:13:08,802 INFO L225 Difference]: With dead ends: 383 [2022-11-23 14:13:08,802 INFO L226 Difference]: Without dead ends: 290 [2022-11-23 14:13:08,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 533 SyntacticMatches, 11 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4600 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=5996, Invalid=16654, Unknown=0, NotChecked=0, Total=22650 [2022-11-23 14:13:08,809 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 198 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:13:08,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 52 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [551 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 14:13:08,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-11-23 14:13:08,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2022-11-23 14:13:08,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.0346020761245676) internal successors, (299), 289 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:13:08,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 299 transitions. [2022-11-23 14:13:08,830 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 299 transitions. Word has length 191 [2022-11-23 14:13:08,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:13:08,830 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 299 transitions. [2022-11-23 14:13:08,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 124 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:13:08,831 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 299 transitions. [2022-11-23 14:13:08,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2022-11-23 14:13:08,835 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:13:08,835 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:13:08,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 14:13:09,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-23 14:13:09,058 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:13:09,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:13:09,058 INFO L85 PathProgramCache]: Analyzing trace with hash 2087274563, now seen corresponding path program 9 times [2022-11-23 14:13:09,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:13:09,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137932948] [2022-11-23 14:13:09,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:09,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:13:09,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:13:18,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6974 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2022-11-23 14:13:18,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:13:18,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137932948] [2022-11-23 14:13:18,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137932948] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:13:18,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234334831] [2022-11-23 14:13:18,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:13:18,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:13:18,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:13:18,823 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:13:18,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 14:13:19,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:13:19,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:13:19,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 3141 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-23 14:13:19,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:13:20,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6974 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2022-11-23 14:13:20,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:13:32,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6974 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2022-11-23 14:13:32,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234334831] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:13:32,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [825223521] [2022-11-23 14:13:32,143 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-23 14:13:32,144 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:13:32,144 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:13:32,144 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:13:32,144 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:13:32,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:32,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:32,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:32,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:32,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:32,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:32,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:32,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:32,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:32,960 INFO L321 Elim1Store]: treesize reduction 1278, result has 6.0 percent of original size [2022-11-23 14:13:32,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 62 case distinctions, treesize of input 235 treesize of output 277 [2022-11-23 14:13:33,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:33,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:33,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:33,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:33,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:33,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:33,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:33,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:33,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:33,030 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 64 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 62 [2022-11-23 14:13:33,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:33,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:33,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 22 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 45 [2022-11-23 14:13:33,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:33,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:33,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:33,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:33,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:33,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:33,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:33,521 INFO L321 Elim1Store]: treesize reduction 135, result has 12.9 percent of original size [2022-11-23 14:13:33,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 920 treesize of output 888 [2022-11-23 14:13:33,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:33,890 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 14:13:33,890 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 14:13:33,922 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:13:33,923 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 [2022-11-23 14:13:33,967 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:33,968 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:34,011 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:13:34,011 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 112 treesize of output 141 [2022-11-23 14:13:34,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:34,146 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:34,147 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 [2022-11-23 14:13:34,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:34,175 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:34,176 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 [2022-11-23 14:13:34,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:34,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:34,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:34,237 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:13:34,238 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:13:34,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:34,304 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:34,304 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 [2022-11-23 14:13:34,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:34,357 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:34,357 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 [2022-11-23 14:13:34,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:34,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:34,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:34,412 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:13:34,412 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:13:34,458 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:34,468 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:34,469 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 [2022-11-23 14:13:34,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:34,501 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:34,502 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 [2022-11-23 14:13:34,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:34,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:34,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:34,558 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:13:34,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:13:34,598 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:34,608 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:34,609 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 [2022-11-23 14:13:34,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:34,655 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:34,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-23 14:13:34,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:34,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:34,720 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:13:34,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:13:34,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:34,794 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:34,794 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 [2022-11-23 14:13:34,852 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:13:34,853 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 [2022-11-23 14:13:34,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:34,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:34,956 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:13:34,957 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 112 treesize of output 141 [2022-11-23 14:13:35,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:35,175 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:35,175 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 [2022-11-23 14:13:35,213 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:13:35,214 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 [2022-11-23 14:13:35,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:35,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:35,304 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:13:35,305 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 112 treesize of output 141 [2022-11-23 14:13:35,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:35,397 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:35,398 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 [2022-11-23 14:13:35,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:35,430 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:35,431 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 [2022-11-23 14:13:35,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:13:35,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:35,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:35,491 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:13:35,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:13:35,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:13:35,539 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:13:35,540 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 [2022-11-23 14:13:35,559 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:13:43,801 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11158#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem21#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)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem22#1| |ULTIMATE.start_main_#t~mem21#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) (+ |ULTIMATE.start_main_~#a9~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:13:43,801 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:13:43,801 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:13:43,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-11-23 14:13:43,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924476100] [2022-11-23 14:13:43,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:13:43,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-11-23 14:13:43,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:13:43,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-11-23 14:13:43,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-23 14:13:43,813 INFO L87 Difference]: Start difference. First operand 290 states and 299 transitions. Second operand has 203 states, 203 states have (on average 1.0985221674876848) internal successors, (223), 202 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:13:44,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:13:44,635 INFO L93 Difference]: Finished difference Result 580 states and 698 transitions. [2022-11-23 14:13:44,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-11-23 14:13:44,636 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0985221674876848) internal successors, (223), 202 states have internal predecessors, (223), 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 288 [2022-11-23 14:13:44,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:13:44,639 INFO L225 Difference]: With dead ends: 580 [2022-11-23 14:13:44,639 INFO L226 Difference]: Without dead ends: 391 [2022-11-23 14:13:44,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 963 GetRequests, 711 SyntacticMatches, 46 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15696 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-11-23 14:13:44,643 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:13:44,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:13:44,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-11-23 14:13:44,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 391. [2022-11-23 14:13:44,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 1.0256410256410255) internal successors, (400), 390 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:13:44,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 400 transitions. [2022-11-23 14:13:44,667 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 400 transitions. Word has length 288 [2022-11-23 14:13:44,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:13:44,667 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 400 transitions. [2022-11-23 14:13:44,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0985221674876848) internal successors, (223), 202 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:13:44,668 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 400 transitions. [2022-11-23 14:13:44,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2022-11-23 14:13:44,675 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:13:44,675 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:13:44,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 14:13:44,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:13:44,887 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:13:44,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:13:44,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1701572225, now seen corresponding path program 10 times [2022-11-23 14:13:44,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:13:44,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660659607] [2022-11-23 14:13:44,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:13:44,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:13:45,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:14:18,507 INFO L134 CoverageAnalysis]: Checked inductivity of 22124 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2022-11-23 14:14:18,508 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:14:18,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660659607] [2022-11-23 14:14:18,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660659607] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:14:18,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444800789] [2022-11-23 14:14:18,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:14:18,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:14:18,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:14:18,510 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:14:18,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 14:14:20,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:14:20,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 4858 conjuncts, 202 conjunts are in the unsatisfiable core [2022-11-23 14:14:20,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:14:20,442 INFO L134 CoverageAnalysis]: Checked inductivity of 22124 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2022-11-23 14:14:20,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:15:10,299 INFO L134 CoverageAnalysis]: Checked inductivity of 22124 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2022-11-23 14:15:10,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444800789] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:15:10,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1888914205] [2022-11-23 14:15:10,302 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2022-11-23 14:15:10,302 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:15:10,302 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:15:10,303 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:15:10,303 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:15:10,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:15:10,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:15:10,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:15:10,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:15:10,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:15:10,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:15:10,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:15:10,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:15:10,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:15:11,172 INFO L321 Elim1Store]: treesize reduction 1278, result has 6.0 percent of original size [2022-11-23 14:15:11,173 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 12 select indices, 12 select index equivalence classes, 21 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 62 case distinctions, treesize of input 235 treesize of output 277 [2022-11-23 14:15:11,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:15:11,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:15:11,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:15:11,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:15:11,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:15:11,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:15:11,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:15:11,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:15:11,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:15:11,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 64 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 62 [2022-11-23 14:15:11,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:15:11,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:15:11,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 22 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 35 [2022-11-23 14:15:11,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:15:11,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:15:11,693 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:15:11,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:15:11,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:15:11,778 INFO L321 Elim1Store]: treesize reduction 235, result has 16.4 percent of original size [2022-11-23 14:15:11,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 900 treesize of output 890 [2022-11-23 14:15:13,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:15:13,296 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-11-23 14:15:13,296 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 1 case distinctions, treesize of input 42 treesize of output 29 [2022-11-23 14:15:13,331 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:15:13,331 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 [2022-11-23 14:15:13,370 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:15:13,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:15:13,430 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:15:13,431 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 112 treesize of output 141 [2022-11-23 14:15:13,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:15:13,503 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:15:13,503 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 [2022-11-23 14:15:13,537 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:15:13,537 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 [2022-11-23 14:15:13,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:15:13,576 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:15:13,616 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:15:13,616 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 112 treesize of output 131 [2022-11-23 14:15:13,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:15:13,707 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:15:13,707 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 [2022-11-23 14:15:13,736 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:15:13,737 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 [2022-11-23 14:15:13,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:15:13,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:15:13,818 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:15:13,818 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 112 treesize of output 141 [2022-11-23 14:15:13,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:15:13,927 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:15:13,928 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 [2022-11-23 14:15:13,961 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:15:13,961 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 [2022-11-23 14:15:14,063 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:15:14,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:15:14,124 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:15:14,125 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 112 treesize of output 141 [2022-11-23 14:15:14,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:15:14,200 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:15:14,201 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 [2022-11-23 14:15:14,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:15:14,232 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:15:14,233 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 [2022-11-23 14:15:14,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:15:14,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:15:14,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:15:14,286 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:15:14,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:15:14,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:15:14,357 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:15:14,358 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 [2022-11-23 14:15:14,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:15:14,408 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:15:14,409 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 [2022-11-23 14:15:14,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:15:14,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:15:14,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:15:14,466 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-11-23 14:15:14,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 127 [2022-11-23 14:15:14,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:15:14,521 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:15:14,522 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 [2022-11-23 14:15:14,551 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:15:14,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-11-23 14:15:14,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:15:14,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:15:14,649 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-11-23 14:15:14,650 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 112 treesize of output 141 [2022-11-23 14:15:14,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:15:14,788 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:15:14,788 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 [2022-11-23 14:15:14,817 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-23 14:15:14,817 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 [2022-11-23 14:15:14,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:15:14,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:15:14,898 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-11-23 14:15:14,899 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 112 treesize of output 131 [2022-11-23 14:15:14,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:15:14,973 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-11-23 14:15:14,974 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 [2022-11-23 14:15:14,994 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:15:23,756 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15824#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (= |ULTIMATE.start_main_~#a5~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a9~0#1.base|) (= |ULTIMATE.start_main_~#a9~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem21#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)))) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~#a7~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| (ite (= |ULTIMATE.start_main_#t~mem22#1| |ULTIMATE.start_main_#t~mem21#1|) 1 0)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (= |ULTIMATE.start_main_~#a6~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem22#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a9~0#1.base|) (+ |ULTIMATE.start_main_~#a9~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a8~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a5~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= |ULTIMATE.start_main_~#a8~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#a6~0#1.base|) (= |ULTIMATE.start_main_~#a7~0#1.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:15:23,756 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:15:23,757 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:15:23,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2022-11-23 14:15:23,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50004099] [2022-11-23 14:15:23,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:15:23,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-11-23 14:15:23,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:15:23,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-11-23 14:15:23,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-23 14:15:23,775 INFO L87 Difference]: Start difference. First operand 391 states and 400 transitions. Second operand has 405 states, 405 states have (on average 1.0493827160493827) internal successors, (425), 404 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:15:26,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:15:26,823 INFO L93 Difference]: Finished difference Result 782 states and 1001 transitions. [2022-11-23 14:15:26,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-11-23 14:15:26,824 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.0493827160493827) internal successors, (425), 404 states have internal predecessors, (425), 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 389 [2022-11-23 14:15:26,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:15:26,826 INFO L225 Difference]: With dead ends: 782 [2022-11-23 14:15:26,826 INFO L226 Difference]: Without dead ends: 593 [2022-11-23 14:15:26,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1367 GetRequests, 936 SyntacticMatches, 23 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17684 ImplicationChecksByTransitivity, 74.2s TimeCoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-11-23 14:15:26,835 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:15:26,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 14:15:26,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-11-23 14:15:26,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 593. [2022-11-23 14:15:26,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 1.0168918918918919) internal successors, (602), 592 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:15:26,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 602 transitions. [2022-11-23 14:15:26,864 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 602 transitions. Word has length 389 [2022-11-23 14:15:26,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:15:26,865 INFO L495 AbstractCegarLoop]: Abstraction has 593 states and 602 transitions. [2022-11-23 14:15:26,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.0493827160493827) internal successors, (425), 404 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:15:26,866 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 602 transitions. [2022-11-23 14:15:26,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2022-11-23 14:15:26,881 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:15:26,881 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:15:26,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 14:15:27,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 14:15:27,098 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:15:27,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:15:27,099 INFO L85 PathProgramCache]: Analyzing trace with hash 392776703, now seen corresponding path program 11 times [2022-11-23 14:15:27,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:15:27,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996324327] [2022-11-23 14:15:27,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:15:27,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:15:29,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:17:36,232 INFO L134 CoverageAnalysis]: Checked inductivity of 83027 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2022-11-23 14:17:36,233 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:17:36,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996324327] [2022-11-23 14:17:36,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996324327] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:17:36,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168921150] [2022-11-23 14:17:36,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:17:36,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:17:36,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:17:36,245 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:17:36,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e0169da1-7cfc-4f49-ac3c-a39576f40480/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process