./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/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_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/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_6baf8e02-a190-404b-a97b-136f1964cbe1/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 c51b17720ce1dad8733576d816f307564aabdff8c7a86cf8d9848ed8571cafd2 --- 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 14:45:26,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 14:45:26,770 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 14:45:26,820 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 14:45:26,820 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 14:45:26,821 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 14:45:26,823 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 14:45:26,825 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 14:45:26,832 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 14:45:26,840 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 14:45:26,841 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 14:45:26,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 14:45:26,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 14:45:26,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 14:45:26,845 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 14:45:26,847 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 14:45:26,848 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 14:45:26,849 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 14:45:26,856 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 14:45:26,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 14:45:26,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 14:45:26,873 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 14:45:26,874 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 14:45:26,875 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 14:45:26,879 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 14:45:26,879 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 14:45:26,880 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 14:45:26,881 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 14:45:26,881 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 14:45:26,883 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 14:45:26,883 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 14:45:26,884 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 14:45:26,885 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 14:45:26,886 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 14:45:26,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 14:45:26,892 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 14:45:26,893 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 14:45:26,893 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 14:45:26,893 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 14:45:26,897 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 14:45:26,898 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 14:45:26,899 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 14:45:26,949 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 14:45:26,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 14:45:26,950 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 14:45:26,951 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 14:45:26,951 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 14:45:26,952 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 14:45:26,952 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 14:45:26,952 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 14:45:26,952 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 14:45:26,953 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 14:45:26,954 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 14:45:26,954 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 14:45:26,954 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 14:45:26,954 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 14:45:26,955 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 14:45:26,955 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 14:45:26,955 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 14:45:26,955 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 14:45:26,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 14:45:26,957 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 14:45:26,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 14:45:26,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 14:45:26,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 14:45:26,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 14:45:26,958 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 14:45:26,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 14:45:26,959 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 14:45:26,959 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 14:45:26,959 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 14:45:26,959 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 14:45:26,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 14:45:26,960 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 14:45:26,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:45:26,961 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 14:45:26,961 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 14:45:26,961 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 14:45:26,962 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 14:45:26,962 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 14:45:26,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 14:45:26,962 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 14:45:26,962 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 14:45:26,963 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_6baf8e02-a190-404b-a97b-136f1964cbe1/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c51b17720ce1dad8733576d816f307564aabdff8c7a86cf8d9848ed8571cafd2 [2022-11-23 14:45:27,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 14:45:27,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 14:45:27,316 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 14:45:27,317 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 14:45:27,318 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 14:45:27,319 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c [2022-11-23 14:45:30,422 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 14:45:30,683 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 14:45:30,684 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c [2022-11-23 14:45:30,690 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/data/d3b7ee306/6dd32473380a44ac9776c9e78056b93b/FLAG16a089e4c [2022-11-23 14:45:30,706 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/data/d3b7ee306/6dd32473380a44ac9776c9e78056b93b [2022-11-23 14:45:30,709 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 14:45:30,711 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 14:45:30,712 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 14:45:30,712 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 14:45:30,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 14:45:30,717 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:45:30" (1/1) ... [2022-11-23 14:45:30,719 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5009e24d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:30, skipping insertion in model container [2022-11-23 14:45:30,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:45:30" (1/1) ... [2022-11-23 14:45:30,728 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 14:45:30,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 14:45:30,950 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_6baf8e02-a190-404b-a97b-136f1964cbe1/sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c[414,427] [2022-11-23 14:45:30,977 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:45:30,990 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 14:45:31,006 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/sv-benchmarks/c/array-cav19/array_init_var_plus_ind.c[414,427] [2022-11-23 14:45:31,019 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 14:45:31,037 INFO L208 MainTranslator]: Completed translation [2022-11-23 14:45:31,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:31 WrapperNode [2022-11-23 14:45:31,038 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 14:45:31,040 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 14:45:31,040 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 14:45:31,040 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 14:45:31,049 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:31" (1/1) ... [2022-11-23 14:45:31,058 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:31" (1/1) ... [2022-11-23 14:45:31,079 INFO L138 Inliner]: procedures = 15, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 51 [2022-11-23 14:45:31,080 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 14:45:31,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 14:45:31,081 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 14:45:31,081 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 14:45:31,092 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:31" (1/1) ... [2022-11-23 14:45:31,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:31" (1/1) ... [2022-11-23 14:45:31,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:31" (1/1) ... [2022-11-23 14:45:31,107 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:31" (1/1) ... [2022-11-23 14:45:31,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:31" (1/1) ... [2022-11-23 14:45:31,116 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:31" (1/1) ... [2022-11-23 14:45:31,117 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:31" (1/1) ... [2022-11-23 14:45:31,118 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:31" (1/1) ... [2022-11-23 14:45:31,120 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 14:45:31,121 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 14:45:31,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 14:45:31,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 14:45:31,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:31" (1/1) ... [2022-11-23 14:45:31,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 14:45:31,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:45:31,161 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 14:45:31,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 14:45:31,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 14:45:31,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 14:45:31,215 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 14:45:31,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 14:45:31,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 14:45:31,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 14:45:31,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 14:45:31,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 14:45:31,303 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 14:45:31,305 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 14:45:31,506 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 14:45:31,547 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 14:45:31,547 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 14:45:31,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:45:31 BoogieIcfgContainer [2022-11-23 14:45:31,550 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 14:45:31,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 14:45:31,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 14:45:31,558 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 14:45:31,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:45:30" (1/3) ... [2022-11-23 14:45:31,560 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41c2df41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:45:31, skipping insertion in model container [2022-11-23 14:45:31,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:45:31" (2/3) ... [2022-11-23 14:45:31,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41c2df41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:45:31, skipping insertion in model container [2022-11-23 14:45:31,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:45:31" (3/3) ... [2022-11-23 14:45:31,566 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind.c [2022-11-23 14:45:31,591 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 14:45:31,591 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 14:45:31,661 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 14:45:31,669 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;@3c8a2ae9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 14:45:31,670 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 14:45:31,674 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 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 14:45:31,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-23 14:45:31,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:31,681 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-23 14:45:31,682 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:45:31,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:31,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1868223123, now seen corresponding path program 1 times [2022-11-23 14:45:31,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:31,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473085749] [2022-11-23 14:45:31,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:31,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:32,051 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 14:45:32,051 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:32,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473085749] [2022-11-23 14:45:32,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473085749] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:45:32,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:45:32,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 14:45:32,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551541707] [2022-11-23 14:45:32,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:45:32,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 14:45:32,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:32,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 14:45:32,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:45:32,138 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.625) internal successors, (13), 9 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) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:32,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:32,204 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2022-11-23 14:45:32,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 14:45:32,209 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-23 14:45:32,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:32,219 INFO L225 Difference]: With dead ends: 26 [2022-11-23 14:45:32,219 INFO L226 Difference]: Without dead ends: 17 [2022-11-23 14:45:32,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 14:45:32,227 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:32,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 10 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:45:32,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-11-23 14:45:32,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 10. [2022-11-23 14:45:32,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:32,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-11-23 14:45:32,299 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2022-11-23 14:45:32,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:32,301 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-11-23 14:45:32,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:32,301 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-11-23 14:45:32,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-23 14:45:32,303 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:32,303 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:32,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 14:45:32,305 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:45:32,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:32,307 INFO L85 PathProgramCache]: Analyzing trace with hash 947313280, now seen corresponding path program 1 times [2022-11-23 14:45:32,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:32,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202097859] [2022-11-23 14:45:32,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:32,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:32,441 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 14:45:32,442 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:32,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202097859] [2022-11-23 14:45:32,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202097859] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 14:45:32,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 14:45:32,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 14:45:32,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964905635] [2022-11-23 14:45:32,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 14:45:32,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 14:45:32,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:32,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 14:45:32,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:45:32,474 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:32,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:32,508 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2022-11-23 14:45:32,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 14:45:32,509 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-23 14:45:32,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:32,510 INFO L225 Difference]: With dead ends: 18 [2022-11-23 14:45:32,511 INFO L226 Difference]: Without dead ends: 11 [2022-11-23 14:45:32,511 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 14:45:32,513 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 1 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:32,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 15 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:45:32,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-11-23 14:45:32,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-11-23 14:45:32,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:32,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-11-23 14:45:32,544 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2022-11-23 14:45:32,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:32,544 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-11-23 14:45:32,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:32,545 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-11-23 14:45:32,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 14:45:32,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:32,546 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:32,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 14:45:32,546 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:45:32,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:32,547 INFO L85 PathProgramCache]: Analyzing trace with hash 362824998, now seen corresponding path program 1 times [2022-11-23 14:45:32,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:32,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952274119] [2022-11-23 14:45:32,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:32,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:32,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:32,748 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 14:45:32,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:32,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952274119] [2022-11-23 14:45:32,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952274119] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:45:32,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711458833] [2022-11-23 14:45:32,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:32,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:45:32,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:45:32,759 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:45:32,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 14:45:32,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:32,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-23 14:45:32,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:45:32,999 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 14:45:33,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:45:33,047 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 14:45:33,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711458833] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:45:33,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1441604836] [2022-11-23 14:45:33,086 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 14:45:33,087 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:45:33,091 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:45:33,104 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:45:33,104 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:45:33,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:33,275 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 14:45:33,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-23 14:45:33,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:33,396 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:45:33,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:45:33,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:33,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 14:45:33,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:33,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:33,671 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-23 14:45:33,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 251 treesize of output 247 [2022-11-23 14:45:33,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:45:33,860 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:45:34,026 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:45:35,229 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '152#(and (= |ULTIMATE.start_main_~k~0#1| 1) (<= 0 |#NULL.base|) (<= 0 |ULTIMATE.start_main_~x~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#a~0#1.offset|))) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (+ (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (- 4) (* |ULTIMATE.start_main_~i~0#1| 4))) |ULTIMATE.start_main_~i~0#1|) (+ |ULTIMATE.start_main_~j~0#1| 1)) (<= ~N~0 100000) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 100000 ~N~0) (<= |#NULL.base| 0) (<= |ULTIMATE.start_main_~i~0#1| (+ |ULTIMATE.start_main_~j~0#1| 1)) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= (ite (<= 0 |ULTIMATE.start_main_#t~mem7#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (not (< |ULTIMATE.start_main_~i~0#1| ~N~0)))' at error location [2022-11-23 14:45:35,229 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:45:35,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:45:35,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2022-11-23 14:45:35,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273376346] [2022-11-23 14:45:35,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:45:35,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 14:45:35,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:35,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 14:45:35,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-11-23 14:45:35,233 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:35,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:35,319 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2022-11-23 14:45:35,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:45:35,319 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 14:45:35,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:35,320 INFO L225 Difference]: With dead ends: 36 [2022-11-23 14:45:35,321 INFO L226 Difference]: Without dead ends: 28 [2022-11-23 14:45:35,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-11-23 14:45:35,323 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:35,324 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 29 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:45:35,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-23 14:45:35,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 16. [2022-11-23 14:45:35,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 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 14:45:35,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2022-11-23 14:45:35,329 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 8 [2022-11-23 14:45:35,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:35,330 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2022-11-23 14:45:35,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:35,330 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2022-11-23 14:45:35,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 14:45:35,331 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:35,331 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:35,343 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 14:45:35,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-23 14:45:35,538 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:45:35,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:35,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1925995406, now seen corresponding path program 1 times [2022-11-23 14:45:35,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:35,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188255606] [2022-11-23 14:45:35,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:35,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:35,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:35,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:35,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188255606] [2022-11-23 14:45:35,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188255606] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:45:35,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716647523] [2022-11-23 14:45:35,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:35,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:45:35,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:45:35,902 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:45:35,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 14:45:35,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:35,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-23 14:45:35,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:45:36,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:45:36,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:45:36,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:36,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:45:36,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2022-11-23 14:45:36,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-11-23 14:45:36,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:36,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716647523] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:45:36,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1621354010] [2022-11-23 14:45:36,299 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 14:45:36,300 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:45:36,300 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:45:36,301 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:45:36,301 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:45:36,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:36,357 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:45:36,358 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:45:36,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:36,382 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:45:36,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:36,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 14:45:36,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:36,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:36,562 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-23 14:45:36,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 251 treesize of output 247 [2022-11-23 14:45:36,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:45:36,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:45:36,726 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:45:37,451 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '303#(and (= |ULTIMATE.start_main_~k~0#1| 1) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#a~0#1.offset|))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (< |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_~x~0#1| 0)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (ite (<= 0 |ULTIMATE.start_main_#t~mem7#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:45:37,451 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:45:37,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:45:37,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-23 14:45:37,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146404721] [2022-11-23 14:45:37,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:45:37,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-23 14:45:37,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:37,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-23 14:45:37,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-11-23 14:45:37,453 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:37,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:37,644 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2022-11-23 14:45:37,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 14:45:37,645 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 14:45:37,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:37,645 INFO L225 Difference]: With dead ends: 29 [2022-11-23 14:45:37,646 INFO L226 Difference]: Without dead ends: 27 [2022-11-23 14:45:37,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-11-23 14:45:37,647 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 27 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:37,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 54 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:45:37,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-23 14:45:37,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2022-11-23 14:45:37,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 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 14:45:37,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-11-23 14:45:37,654 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2022-11-23 14:45:37,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:37,655 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-11-23 14:45:37,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:37,655 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-11-23 14:45:37,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 14:45:37,656 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:37,656 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:37,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 14:45:37,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:45:37,862 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:45:37,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:37,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1306013557, now seen corresponding path program 2 times [2022-11-23 14:45:37,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:37,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765342145] [2022-11-23 14:45:37,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:37,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:38,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:38,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:38,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765342145] [2022-11-23 14:45:38,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765342145] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:45:38,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429854053] [2022-11-23 14:45:38,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:45:38,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:45:38,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:45:38,311 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:45:38,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 14:45:38,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 14:45:38,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:45:38,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-23 14:45:38,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:45:38,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:45:38,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:38,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-23 14:45:38,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:45:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:38,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:45:38,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-11-23 14:45:38,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-11-23 14:45:38,866 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:38,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429854053] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:45:38,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [552469861] [2022-11-23 14:45:38,870 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2022-11-23 14:45:38,870 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:45:38,870 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:45:38,871 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:45:38,871 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:45:38,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:38,922 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 14:45:38,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-23 14:45:38,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:38,969 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:45:38,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:45:39,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:39,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:45:39,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:39,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:45:39,120 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:45:39,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 244 treesize of output 246 [2022-11-23 14:45:39,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:45:39,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:45:39,260 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:45:39,989 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '473#(and (= |ULTIMATE.start_main_~k~0#1| 1) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start_main_#t~mem7#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ (* |ULTIMATE.start_main_~k~0#1| 4) |ULTIMATE.start_main_~#a~0#1.offset|))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (< |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~i~0#1|) (not (= |ULTIMATE.start_main_~x~0#1| 0)) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= (ite (<= 0 |ULTIMATE.start_main_#t~mem7#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:45:39,989 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:45:39,989 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:45:39,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-11-23 14:45:39,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416606920] [2022-11-23 14:45:39,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:45:39,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-23 14:45:39,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:39,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-23 14:45:39,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-11-23 14:45:39,991 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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 14:45:40,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:40,327 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2022-11-23 14:45:40,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 14:45:40,328 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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) Word has length 13 [2022-11-23 14:45:40,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:40,329 INFO L225 Difference]: With dead ends: 25 [2022-11-23 14:45:40,329 INFO L226 Difference]: Without dead ends: 23 [2022-11-23 14:45:40,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2022-11-23 14:45:40,330 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 42 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:40,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 34 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:45:40,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-23 14:45:40,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2022-11-23 14:45:40,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:40,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-11-23 14:45:40,336 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2022-11-23 14:45:40,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:40,336 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-11-23 14:45:40,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 18 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 14:45:40,336 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-11-23 14:45:40,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-23 14:45:40,337 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:40,337 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:40,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 14:45:40,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:45:40,538 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:45:40,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:40,538 INFO L85 PathProgramCache]: Analyzing trace with hash 866156038, now seen corresponding path program 1 times [2022-11-23 14:45:40,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:40,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153522546] [2022-11-23 14:45:40,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:40,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:40,616 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:40,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:40,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153522546] [2022-11-23 14:45:40,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153522546] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:45:40,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184325669] [2022-11-23 14:45:40,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:40,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:45:40,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:45:40,620 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:45:40,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 14:45:40,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:40,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-23 14:45:40,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:45:40,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:40,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:45:40,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:40,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184325669] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:45:40,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [79607649] [2022-11-23 14:45:40,796 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:45:40,796 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:45:40,796 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:45:40,797 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:45:40,797 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:45:40,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:40,836 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 14:45:40,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-23 14:45:40,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:40,874 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:45:40,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:45:40,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:40,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 37 [2022-11-23 14:45:40,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:40,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:41,000 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-23 14:45:41,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 257 treesize of output 253 [2022-11-23 14:45:41,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:45:41,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:45:41,270 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:45:42,010 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '641#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:45:42,010 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:45:42,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:45:42,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-11-23 14:45:42,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663673940] [2022-11-23 14:45:42,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:45:42,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 14:45:42,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:42,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 14:45:42,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-11-23 14:45:42,012 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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 14:45:42,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:42,048 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-11-23 14:45:42,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 14:45:42,049 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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) Word has length 14 [2022-11-23 14:45:42,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:42,050 INFO L225 Difference]: With dead ends: 28 [2022-11-23 14:45:42,050 INFO L226 Difference]: Without dead ends: 18 [2022-11-23 14:45:42,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-11-23 14:45:42,051 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 4 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:42,052 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 21 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 14:45:42,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-11-23 14:45:42,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-11-23 14:45:42,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:42,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-11-23 14:45:42,056 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2022-11-23 14:45:42,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:42,056 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-11-23 14:45:42,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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 14:45:42,057 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-11-23 14:45:42,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 14:45:42,057 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:42,057 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:42,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 14:45:42,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:45:42,264 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:45:42,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:42,264 INFO L85 PathProgramCache]: Analyzing trace with hash -653734721, now seen corresponding path program 2 times [2022-11-23 14:45:42,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:42,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819532432] [2022-11-23 14:45:42,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:42,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:42,648 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:42,648 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:42,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819532432] [2022-11-23 14:45:42,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819532432] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:45:42,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668343453] [2022-11-23 14:45:42,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:45:42,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:45:42,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:45:42,663 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:45:42,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 14:45:42,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 14:45:42,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:45:42,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 14:45:42,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:45:42,849 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:45:42,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:45:42,976 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:42,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:45:43,048 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-23 14:45:43,052 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-23 14:45:43,161 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:43,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668343453] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:45:43,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1016741094] [2022-11-23 14:45:43,163 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:45:43,163 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:45:43,164 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:45:43,164 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:45:43,164 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:45:43,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:43,203 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 14:45:43,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-23 14:45:43,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:43,248 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:45:43,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:45:43,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:43,290 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 37 [2022-11-23 14:45:43,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:43,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:43,384 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-23 14:45:43,385 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 257 treesize of output 253 [2022-11-23 14:45:43,450 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:45:43,625 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:45:43,635 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:45:44,575 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '823#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:45:44,576 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:45:44,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:45:44,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2022-11-23 14:45:44,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432779726] [2022-11-23 14:45:44,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:45:44,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-23 14:45:44,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:44,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-23 14:45:44,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2022-11-23 14:45:44,578 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 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 14:45:45,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:45,149 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-11-23 14:45:45,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-23 14:45:45,150 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 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 16 [2022-11-23 14:45:45,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:45,151 INFO L225 Difference]: With dead ends: 37 [2022-11-23 14:45:45,151 INFO L226 Difference]: Without dead ends: 35 [2022-11-23 14:45:45,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=191, Invalid=1291, Unknown=0, NotChecked=0, Total=1482 [2022-11-23 14:45:45,153 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 63 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:45,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 90 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:45:45,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-23 14:45:45,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2022-11-23 14:45:45,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:45,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-11-23 14:45:45,160 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 16 [2022-11-23 14:45:45,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:45,160 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-11-23 14:45:45,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 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 14:45:45,161 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-11-23 14:45:45,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-23 14:45:45,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:45,162 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:45,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 14:45:45,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:45:45,368 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:45:45,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:45,369 INFO L85 PathProgramCache]: Analyzing trace with hash -802103325, now seen corresponding path program 1 times [2022-11-23 14:45:45,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:45,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138713938] [2022-11-23 14:45:45,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:45,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:45,458 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:45:45,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:45,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138713938] [2022-11-23 14:45:45,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138713938] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:45:45,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476766106] [2022-11-23 14:45:45,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:45,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:45:45,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:45:45,461 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:45:45,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 14:45:45,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:45,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 14:45:45,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:45:45,604 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:45:45,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:45:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-23 14:45:45,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476766106] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:45:45,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [637773608] [2022-11-23 14:45:45,677 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:45:45,677 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:45:45,678 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:45:45,678 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:45:45,678 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:45:45,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:45,718 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 14:45:45,718 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-23 14:45:45,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:45,758 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:45:45,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:45:45,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:45,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:45:45,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:45,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:45:45,874 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:45:45,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 244 treesize of output 246 [2022-11-23 14:45:46,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:45:46,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:45:46,154 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:45:46,930 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1047#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 99999 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:45:46,931 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:45:46,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:45:46,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2022-11-23 14:45:46,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339001766] [2022-11-23 14:45:46,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:45:46,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-23 14:45:46,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:46,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-23 14:45:46,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2022-11-23 14:45:46,933 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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 14:45:47,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:47,030 INFO L93 Difference]: Finished difference Result 100 states and 114 transitions. [2022-11-23 14:45:47,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:45:47,031 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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) Word has length 17 [2022-11-23 14:45:47,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:47,032 INFO L225 Difference]: With dead ends: 100 [2022-11-23 14:45:47,032 INFO L226 Difference]: Without dead ends: 92 [2022-11-23 14:45:47,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2022-11-23 14:45:47,033 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 151 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:47,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 58 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:45:47,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-23 14:45:47,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 37. [2022-11-23 14:45:47,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 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 14:45:47,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-11-23 14:45:47,044 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 17 [2022-11-23 14:45:47,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:47,044 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-11-23 14:45:47,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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 14:45:47,044 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-11-23 14:45:47,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-23 14:45:47,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:47,045 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 14:45:47,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 14:45:47,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-23 14:45:47,251 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:45:47,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:47,251 INFO L85 PathProgramCache]: Analyzing trace with hash -979873480, now seen corresponding path program 3 times [2022-11-23 14:45:47,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:47,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521586337] [2022-11-23 14:45:47,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:47,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:47,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:47,603 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:47,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:47,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521586337] [2022-11-23 14:45:47,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521586337] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:45:47,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680466407] [2022-11-23 14:45:47,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:45:47,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:45:47,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:45:47,605 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:45:47,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 14:45:47,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:45:47,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:45:47,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-23 14:45:47,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:45:47,768 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:45:47,812 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-23 14:45:47,812 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 24 [2022-11-23 14:45:47,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-23 14:45:47,907 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:47,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:45:48,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-11-23 14:45:48,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 138 [2022-11-23 14:45:48,206 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:48,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680466407] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:45:48,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [17636718] [2022-11-23 14:45:48,214 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:45:48,214 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:45:48,215 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:45:48,215 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:45:48,215 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:45:48,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:48,274 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:45:48,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:45:48,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:48,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:45:48,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:48,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:45:48,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:48,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:45:48,406 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:45:48,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 250 [2022-11-23 14:45:48,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:45:48,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:45:48,733 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:45:49,644 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1364#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:45:49,645 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:45:49,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:45:49,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-11-23 14:45:49,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894229968] [2022-11-23 14:45:49,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:45:49,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 14:45:49,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:49,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 14:45:49,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2022-11-23 14:45:49,647 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 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 14:45:50,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:50,035 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2022-11-23 14:45:50,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 14:45:50,035 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 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 18 [2022-11-23 14:45:50,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:50,037 INFO L225 Difference]: With dead ends: 46 [2022-11-23 14:45:50,038 INFO L226 Difference]: Without dead ends: 44 [2022-11-23 14:45:50,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=194, Invalid=1288, Unknown=0, NotChecked=0, Total=1482 [2022-11-23 14:45:50,039 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 67 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:50,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 50 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:45:50,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-23 14:45:50,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-11-23 14:45:50,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.25) internal successors, (45), 36 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 14:45:50,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-11-23 14:45:50,049 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 18 [2022-11-23 14:45:50,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:50,049 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-11-23 14:45:50,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 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 14:45:50,050 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-11-23 14:45:50,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-23 14:45:50,051 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:50,051 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-23 14:45:50,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 14:45:50,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:45:50,265 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:45:50,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:50,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1486991388, now seen corresponding path program 4 times [2022-11-23 14:45:50,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:50,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983053928] [2022-11-23 14:45:50,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:50,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:50,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:50,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:50,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983053928] [2022-11-23 14:45:50,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983053928] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:45:50,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530331678] [2022-11-23 14:45:50,760 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:45:50,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:45:50,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:45:50,762 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:45:50,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 14:45:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:50,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 14:45:50,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:45:50,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:45:51,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:45:51,227 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:45:51,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2022-11-23 14:45:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:51,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:45:51,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-23 14:45:51,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-23 14:45:51,520 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:51,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530331678] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:45:51,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1847215312] [2022-11-23 14:45:51,522 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:45:51,523 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:45:51,523 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:45:51,523 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:45:51,523 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:45:51,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:51,572 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:45:51,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:45:51,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:51,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:45:51,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:51,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 14:45:51,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:51,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:51,710 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-23 14:45:51,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 251 treesize of output 247 [2022-11-23 14:45:51,773 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:45:51,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:45:51,912 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:45:52,795 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1646#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:45:52,796 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:45:52,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:45:52,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-11-23 14:45:52,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149671587] [2022-11-23 14:45:52,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:45:52,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-23 14:45:52,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:52,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-23 14:45:52,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2022-11-23 14:45:52,798 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 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 14:45:53,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:53,365 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-11-23 14:45:53,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 14:45:53,365 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 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 21 [2022-11-23 14:45:53,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:53,366 INFO L225 Difference]: With dead ends: 60 [2022-11-23 14:45:53,366 INFO L226 Difference]: Without dead ends: 47 [2022-11-23 14:45:53,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2022-11-23 14:45:53,368 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 37 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:53,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 114 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:45:53,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-23 14:45:53,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 37. [2022-11-23 14:45:53,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 36 states have internal predecessors, (44), 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 14:45:53,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2022-11-23 14:45:53,377 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 21 [2022-11-23 14:45:53,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:53,377 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2022-11-23 14:45:53,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 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 14:45:53,378 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2022-11-23 14:45:53,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-23 14:45:53,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:53,379 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1] [2022-11-23 14:45:53,393 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-23 14:45:53,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:45:53,585 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:45:53,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:53,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1802285311, now seen corresponding path program 5 times [2022-11-23 14:45:53,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:53,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280424237] [2022-11-23 14:45:53,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:53,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:53,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:53,701 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:53,702 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:53,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280424237] [2022-11-23 14:45:53,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280424237] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:45:53,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832941951] [2022-11-23 14:45:53,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:45:53,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:45:53,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:45:53,705 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:45:53,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 14:45:53,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 14:45:53,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:45:53,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-23 14:45:53,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:45:53,942 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:53,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:45:54,047 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:54,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832941951] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:45:54,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1295593415] [2022-11-23 14:45:54,051 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:45:54,051 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:45:54,051 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:45:54,052 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:45:54,052 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:45:54,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:54,121 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:45:54,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:45:54,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:54,133 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:45:54,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:54,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 37 [2022-11-23 14:45:54,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:54,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:54,262 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-23 14:45:54,263 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 257 treesize of output 253 [2022-11-23 14:45:54,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:45:54,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:45:54,525 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:45:55,295 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1945#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:45:55,295 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:45:55,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:45:55,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-23 14:45:55,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418042390] [2022-11-23 14:45:55,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:45:55,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 14:45:55,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:55,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 14:45:55,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2022-11-23 14:45:55,299 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 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 14:45:55,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:55,372 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2022-11-23 14:45:55,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 14:45:55,372 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 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 14:45:55,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:55,373 INFO L225 Difference]: With dead ends: 47 [2022-11-23 14:45:55,373 INFO L226 Difference]: Without dead ends: 33 [2022-11-23 14:45:55,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2022-11-23 14:45:55,374 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 14 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:55,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 44 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 14:45:55,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-11-23 14:45:55,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-11-23 14:45:55,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 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 14:45:55,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2022-11-23 14:45:55,382 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 22 [2022-11-23 14:45:55,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:55,383 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2022-11-23 14:45:55,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 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 14:45:55,383 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2022-11-23 14:45:55,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-11-23 14:45:55,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:55,384 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-23 14:45:55,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 14:45:55,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:45:55,590 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:45:55,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:55,590 INFO L85 PathProgramCache]: Analyzing trace with hash -73461949, now seen corresponding path program 6 times [2022-11-23 14:45:55,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:55,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958558169] [2022-11-23 14:45:55,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:55,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:55,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:45:56,065 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:56,066 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:45:56,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958558169] [2022-11-23 14:45:56,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958558169] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:45:56,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850497020] [2022-11-23 14:45:56,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:45:56,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:45:56,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:45:56,069 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:45:56,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 14:45:56,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:45:56,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:45:56,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-23 14:45:56,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:45:56,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:45:56,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-23 14:45:56,311 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-11-23 14:45:56,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2022-11-23 14:45:56,588 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:45:56,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 12 [2022-11-23 14:45:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:56,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:45:57,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 61 [2022-11-23 14:45:57,162 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-23 14:45:57,162 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 687 treesize of output 667 [2022-11-23 14:45:57,505 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:45:57,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850497020] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:45:57,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [418940386] [2022-11-23 14:45:57,508 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:45:57,508 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:45:57,508 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:45:57,509 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:45:57,509 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:45:57,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:57,551 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 14:45:57,551 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-23 14:45:57,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:57,596 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:45:57,596 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:45:57,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:57,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 37 [2022-11-23 14:45:57,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:57,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:45:57,704 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-23 14:45:57,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 257 treesize of output 253 [2022-11-23 14:45:57,761 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:45:57,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:45:57,931 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:45:58,825 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2228#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:45:58,825 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:45:58,825 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:45:58,825 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 31 [2022-11-23 14:45:58,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31735409] [2022-11-23 14:45:58,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:45:58,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-23 14:45:58,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:45:58,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-23 14:45:58,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1329, Unknown=0, NotChecked=0, Total=1482 [2022-11-23 14:45:58,828 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 14:45:59,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:45:59,661 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2022-11-23 14:45:59,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 14:45:59,661 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) Word has length 23 [2022-11-23 14:45:59,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:45:59,662 INFO L225 Difference]: With dead ends: 40 [2022-11-23 14:45:59,662 INFO L226 Difference]: Without dead ends: 38 [2022-11-23 14:45:59,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=309, Invalid=2141, Unknown=0, NotChecked=0, Total=2450 [2022-11-23 14:45:59,663 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 118 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:45:59,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 76 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:45:59,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-23 14:45:59,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-11-23 14:45:59,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:45:59,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-11-23 14:45:59,671 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 23 [2022-11-23 14:45:59,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:45:59,671 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-11-23 14:45:59,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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 14:45:59,672 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-11-23 14:45:59,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-23 14:45:59,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:45:59,673 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 4, 3, 3, 1, 1, 1, 1, 1] [2022-11-23 14:45:59,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 14:45:59,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-23 14:45:59,878 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:45:59,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:45:59,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1933521457, now seen corresponding path program 7 times [2022-11-23 14:45:59,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:45:59,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446809447] [2022-11-23 14:45:59,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:45:59,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:45:59,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:46:00,291 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 3 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:46:00,291 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:46:00,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446809447] [2022-11-23 14:46:00,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446809447] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:46:00,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919349991] [2022-11-23 14:46:00,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:46:00,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:46:00,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:46:00,295 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:46:00,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 14:46:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:46:00,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-23 14:46:00,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:46:00,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:46:00,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:46:00,826 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:46:00,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:46:00,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-23 14:46:00,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-23 14:46:01,222 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:46:01,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919349991] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:46:01,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1527331643] [2022-11-23 14:46:01,223 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:46:01,224 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:46:01,224 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:46:01,225 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:46:01,225 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:46:01,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:46:01,278 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:46:01,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:46:01,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:46:01,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:46:01,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:46:01,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 37 [2022-11-23 14:46:01,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:46:01,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:46:01,395 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-23 14:46:01,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 257 treesize of output 253 [2022-11-23 14:46:01,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:46:01,597 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:46:01,606 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:46:02,484 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2548#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:46:02,484 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:46:02,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:46:02,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 33 [2022-11-23 14:46:02,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042572126] [2022-11-23 14:46:02,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:46:02,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-23 14:46:02,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:46:02,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-23 14:46:02,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1510, Unknown=0, NotChecked=0, Total=1640 [2022-11-23 14:46:02,486 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 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 14:46:03,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:46:03,381 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2022-11-23 14:46:03,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-23 14:46:03,382 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 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 26 [2022-11-23 14:46:03,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:46:03,382 INFO L225 Difference]: With dead ends: 54 [2022-11-23 14:46:03,383 INFO L226 Difference]: Without dead ends: 36 [2022-11-23 14:46:03,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=255, Invalid=2501, Unknown=0, NotChecked=0, Total=2756 [2022-11-23 14:46:03,385 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 61 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:46:03,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 119 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:46:03,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-23 14:46:03,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-11-23 14:46:03,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 states have internal predecessors, (41), 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 14:46:03,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-11-23 14:46:03,394 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 26 [2022-11-23 14:46:03,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:46:03,394 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-11-23 14:46:03,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 33 states have internal predecessors, (75), 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 14:46:03,395 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-11-23 14:46:03,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-23 14:46:03,395 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:46:03,395 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 4, 3, 3, 1, 1, 1, 1, 1] [2022-11-23 14:46:03,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 14:46:03,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-23 14:46:03,601 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:46:03,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:46:03,602 INFO L85 PathProgramCache]: Analyzing trace with hash -2058210454, now seen corresponding path program 8 times [2022-11-23 14:46:03,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:46:03,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122804397] [2022-11-23 14:46:03,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:46:03,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:46:03,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:46:04,119 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:46:04,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:46:04,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122804397] [2022-11-23 14:46:04,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122804397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:46:04,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600960562] [2022-11-23 14:46:04,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:46:04,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:46:04,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:46:04,121 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:46:04,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 14:46:04,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-11-23 14:46:04,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:46:04,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 41 conjunts are in the unsatisfiable core [2022-11-23 14:46:04,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:46:04,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:46:04,441 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-23 14:46:04,441 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 27 treesize of output 26 [2022-11-23 14:46:04,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-23 14:46:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:46:04,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:46:04,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-11-23 14:46:04,925 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 138 [2022-11-23 14:46:05,164 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:46:05,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600960562] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:46:05,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [889348341] [2022-11-23 14:46:05,166 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:46:05,166 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:46:05,166 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:46:05,166 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:46:05,167 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:46:05,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:46:05,205 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:46:05,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:46:05,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:46:05,217 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:46:05,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:46:05,246 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:46:05,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:46:05,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:46:05,335 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:46:05,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 250 [2022-11-23 14:46:05,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:46:05,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:46:05,549 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:46:06,471 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2899#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:46:06,471 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:46:06,471 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:46:06,471 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 32 [2022-11-23 14:46:06,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899049808] [2022-11-23 14:46:06,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:46:06,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-23 14:46:06,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:46:06,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-23 14:46:06,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1426, Unknown=0, NotChecked=0, Total=1560 [2022-11-23 14:46:06,473 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 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 14:46:07,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:46:07,318 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-11-23 14:46:07,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-23 14:46:07,319 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 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 28 [2022-11-23 14:46:07,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:46:07,319 INFO L225 Difference]: With dead ends: 43 [2022-11-23 14:46:07,319 INFO L226 Difference]: Without dead ends: 41 [2022-11-23 14:46:07,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=264, Invalid=2286, Unknown=0, NotChecked=0, Total=2550 [2022-11-23 14:46:07,321 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 92 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:46:07,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 97 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:46:07,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-23 14:46:07,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2022-11-23 14:46:07,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 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 14:46:07,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2022-11-23 14:46:07,334 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 28 [2022-11-23 14:46:07,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:46:07,334 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2022-11-23 14:46:07,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 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 14:46:07,335 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2022-11-23 14:46:07,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-11-23 14:46:07,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:46:07,336 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 5, 4, 4, 1, 1, 1, 1, 1] [2022-11-23 14:46:07,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 14:46:07,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:46:07,542 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:46:07,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:46:07,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1189394262, now seen corresponding path program 9 times [2022-11-23 14:46:07,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:46:07,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362459168] [2022-11-23 14:46:07,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:46:07,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:46:07,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:46:08,174 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 9 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:46:08,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:46:08,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362459168] [2022-11-23 14:46:08,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362459168] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:46:08,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027002127] [2022-11-23 14:46:08,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:46:08,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:46:08,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:46:08,176 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:46:08,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 14:46:08,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:46:08,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:46:08,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-23 14:46:08,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:46:08,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:46:08,411 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-23 14:46:08,412 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 30 treesize of output 37 [2022-11-23 14:46:08,525 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-23 14:46:08,525 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 45 treesize of output 52 [2022-11-23 14:46:08,671 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-23 14:46:08,671 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 47 treesize of output 54 [2022-11-23 14:46:08,813 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-23 14:46:08,814 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 47 treesize of output 54 [2022-11-23 14:46:09,972 INFO L321 Elim1Store]: treesize reduction 66, result has 9.6 percent of original size [2022-11-23 14:46:09,973 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 67 treesize of output 41 [2022-11-23 14:46:10,015 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 16 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:46:10,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:46:46,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 91 [2022-11-23 14:46:46,485 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-11-23 14:46:46,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8355 treesize of output 8283 [2022-11-23 14:46:56,217 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 18 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:46:56,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027002127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:46:56,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2033458645] [2022-11-23 14:46:56,219 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:46:56,219 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:46:56,219 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:46:56,220 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:46:56,220 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:46:56,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:46:56,273 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:46:56,273 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:46:56,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:46:56,287 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:46:56,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:46:56,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:46:56,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:46:56,360 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:46:56,390 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:46:56,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 244 treesize of output 246 [2022-11-23 14:46:56,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:46:56,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:46:56,609 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:46:57,937 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3265#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:46:57,937 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:46:57,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:46:57,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 41 [2022-11-23 14:46:57,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278031733] [2022-11-23 14:46:57,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:46:57,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-23 14:46:57,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:46:57,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-23 14:46:57,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=2023, Unknown=14, NotChecked=0, Total=2352 [2022-11-23 14:46:57,940 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 states have internal predecessors, (86), 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 14:47:04,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:47:04,376 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2022-11-23 14:47:04,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-23 14:47:04,377 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 states have internal predecessors, (86), 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 31 [2022-11-23 14:47:04,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:47:04,378 INFO L225 Difference]: With dead ends: 74 [2022-11-23 14:47:04,378 INFO L226 Difference]: Without dead ends: 39 [2022-11-23 14:47:04,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1640 ImplicationChecksByTransitivity, 43.3s TimeCoverageRelationStatistics Valid=953, Invalid=5353, Unknown=14, NotChecked=0, Total=6320 [2022-11-23 14:47:04,381 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 47 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:47:04,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 83 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-23 14:47:04,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-11-23 14:47:04,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-11-23 14:47:04,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:47:04,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-11-23 14:47:04,394 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 31 [2022-11-23 14:47:04,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:47:04,395 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-11-23 14:47:04,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0476190476190474) internal successors, (86), 41 states have internal predecessors, (86), 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 14:47:04,395 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-11-23 14:47:04,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-23 14:47:04,396 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:47:04,396 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 5, 4, 4, 1, 1, 1, 1, 1] [2022-11-23 14:47:04,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 14:47:04,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 14:47:04,599 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:47:04,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:47:04,599 INFO L85 PathProgramCache]: Analyzing trace with hash 367132600, now seen corresponding path program 10 times [2022-11-23 14:47:04,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:47:04,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700657970] [2022-11-23 14:47:04,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:47:04,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:47:04,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:47:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:47:05,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:47:05,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700657970] [2022-11-23 14:47:05,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700657970] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:47:05,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629827913] [2022-11-23 14:47:05,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:47:05,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:47:05,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:47:05,366 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:47:05,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 14:47:05,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:47:05,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-23 14:47:05,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:47:05,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:47:05,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:05,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-23 14:47:05,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:05,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-23 14:47:06,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:47:06,247 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:47:06,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:47:06,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-23 14:47:06,739 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 298 treesize of output 290 [2022-11-23 14:47:07,263 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:47:07,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629827913] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:47:07,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1105806036] [2022-11-23 14:47:07,265 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:47:07,265 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:47:07,266 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:47:07,266 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:47:07,266 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:47:07,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:07,324 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:47:07,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:47:07,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:07,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:47:07,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:07,383 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:47:07,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:07,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:47:07,467 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:47:07,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 250 [2022-11-23 14:47:07,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:47:07,691 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:47:07,698 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:47:09,033 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3740#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:47:09,033 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:47:09,033 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:47:09,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 45 [2022-11-23 14:47:09,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529495185] [2022-11-23 14:47:09,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:47:09,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-23 14:47:09,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:47:09,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-23 14:47:09,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=2562, Unknown=0, NotChecked=0, Total=2756 [2022-11-23 14:47:09,035 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 45 states have internal predecessors, (102), 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 14:47:10,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:47:10,066 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2022-11-23 14:47:10,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 14:47:10,067 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 45 states have internal predecessors, (102), 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 35 [2022-11-23 14:47:10,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:47:10,067 INFO L225 Difference]: With dead ends: 46 [2022-11-23 14:47:10,067 INFO L226 Difference]: Without dead ends: 44 [2022-11-23 14:47:10,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1020 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=384, Invalid=3906, Unknown=0, NotChecked=0, Total=4290 [2022-11-23 14:47:10,069 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 81 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:47:10,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 151 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-23 14:47:10,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-23 14:47:10,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2022-11-23 14:47:10,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 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 14:47:10,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2022-11-23 14:47:10,089 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 35 [2022-11-23 14:47:10,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:47:10,089 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2022-11-23 14:47:10,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.217391304347826) internal successors, (102), 45 states have internal predecessors, (102), 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 14:47:10,089 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2022-11-23 14:47:10,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-23 14:47:10,090 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:47:10,090 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 6, 5, 5, 1, 1, 1, 1, 1] [2022-11-23 14:47:10,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 14:47:10,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 14:47:10,296 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:47:10,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:47:10,297 INFO L85 PathProgramCache]: Analyzing trace with hash -2029293156, now seen corresponding path program 11 times [2022-11-23 14:47:10,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:47:10,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275338830] [2022-11-23 14:47:10,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:47:10,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:47:10,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:47:11,116 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:47:11,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:47:11,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275338830] [2022-11-23 14:47:11,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275338830] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:47:11,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50608210] [2022-11-23 14:47:11,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:47:11,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:47:11,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:47:11,120 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:47:11,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 14:47:11,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-23 14:47:11,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:47:11,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-23 14:47:11,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:47:11,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:47:11,584 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-23 14:47:11,584 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 27 treesize of output 26 [2022-11-23 14:47:12,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-23 14:47:12,047 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:47:12,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:47:12,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-11-23 14:47:12,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-11-23 14:47:13,120 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:47:13,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50608210] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:47:13,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [22640241] [2022-11-23 14:47:13,122 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:47:13,122 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:47:13,123 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:47:13,123 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:47:13,123 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:47:13,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:13,175 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 14:47:13,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-23 14:47:13,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:13,223 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:47:13,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:47:13,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:13,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-23 14:47:13,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:13,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:47:13,339 INFO L321 Elim1Store]: treesize reduction 74, result has 30.8 percent of original size [2022-11-23 14:47:13,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 263 treesize of output 269 [2022-11-23 14:47:13,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:47:13,559 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:47:13,567 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:47:14,923 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4161#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:47:14,923 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:47:14,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:47:14,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 42 [2022-11-23 14:47:14,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776063449] [2022-11-23 14:47:14,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:47:14,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-23 14:47:14,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:47:14,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-23 14:47:14,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2284, Unknown=0, NotChecked=0, Total=2450 [2022-11-23 14:47:14,926 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 42 states have internal predecessors, (95), 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 14:47:16,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:47:16,676 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2022-11-23 14:47:16,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-23 14:47:16,676 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 42 states have internal predecessors, (95), 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 38 [2022-11-23 14:47:16,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:47:16,677 INFO L225 Difference]: With dead ends: 49 [2022-11-23 14:47:16,677 INFO L226 Difference]: Without dead ends: 47 [2022-11-23 14:47:16,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 893 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=371, Invalid=4051, Unknown=0, NotChecked=0, Total=4422 [2022-11-23 14:47:16,679 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 41 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:47:16,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 177 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-23 14:47:16,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-23 14:47:16,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2022-11-23 14:47:16,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 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 14:47:16,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2022-11-23 14:47:16,696 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 38 [2022-11-23 14:47:16,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:47:16,696 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2022-11-23 14:47:16,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2093023255813953) internal successors, (95), 42 states have internal predecessors, (95), 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 14:47:16,697 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2022-11-23 14:47:16,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-11-23 14:47:16,697 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:47:16,698 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 7, 6, 6, 1, 1, 1, 1, 1] [2022-11-23 14:47:16,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-23 14:47:16,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-23 14:47:16,904 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:47:16,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:47:16,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1292371256, now seen corresponding path program 12 times [2022-11-23 14:47:16,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:47:16,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984591857] [2022-11-23 14:47:16,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:47:16,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:47:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:47:17,716 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:47:17,717 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:47:17,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984591857] [2022-11-23 14:47:17,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984591857] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:47:17,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140494589] [2022-11-23 14:47:17,717 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:47:17,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:47:17,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:47:17,719 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:47:17,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 14:47:17,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:47:17,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:47:17,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 47 conjunts are in the unsatisfiable core [2022-11-23 14:47:17,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:47:18,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:47:19,045 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-23 14:47:19,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-23 14:47:19,095 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 46 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:47:19,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:47:19,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-23 14:47:19,962 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-11-23 14:47:20,629 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 45 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:47:20,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140494589] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:47:20,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2047114100] [2022-11-23 14:47:20,631 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:47:20,631 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:47:20,631 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:47:20,631 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:47:20,631 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:47:20,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:20,678 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 14:47:20,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-23 14:47:20,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:20,725 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:47:20,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:47:20,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:20,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:47:20,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:20,806 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:47:20,841 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:47:20,841 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 250 [2022-11-23 14:47:20,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:47:21,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:47:21,089 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:47:22,380 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4621#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:47:22,380 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:47:22,380 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:47:22,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 47 [2022-11-23 14:47:22,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875009239] [2022-11-23 14:47:22,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:47:22,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-11-23 14:47:22,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:47:22,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-11-23 14:47:22,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=2660, Unknown=0, NotChecked=0, Total=2970 [2022-11-23 14:47:22,382 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 48 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 47 states have internal predecessors, (109), 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 14:47:24,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:47:24,380 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2022-11-23 14:47:24,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-23 14:47:24,381 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 47 states have internal predecessors, (109), 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 41 [2022-11-23 14:47:24,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:47:24,382 INFO L225 Difference]: With dead ends: 70 [2022-11-23 14:47:24,382 INFO L226 Difference]: Without dead ends: 45 [2022-11-23 14:47:24,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=587, Invalid=4383, Unknown=0, NotChecked=0, Total=4970 [2022-11-23 14:47:24,384 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 81 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:47:24,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 71 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 14:47:24,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-23 14:47:24,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-11-23 14:47:24,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 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 14:47:24,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-11-23 14:47:24,401 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 41 [2022-11-23 14:47:24,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:47:24,401 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-11-23 14:47:24,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.2708333333333335) internal successors, (109), 47 states have internal predecessors, (109), 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 14:47:24,401 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-11-23 14:47:24,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-23 14:47:24,402 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:47:24,402 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 7, 6, 6, 1, 1, 1, 1, 1] [2022-11-23 14:47:24,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-23 14:47:24,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 14:47:24,610 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:47:24,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:47:24,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1038961375, now seen corresponding path program 13 times [2022-11-23 14:47:24,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:47:24,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955305570] [2022-11-23 14:47:24,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:47:24,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:47:24,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:47:25,935 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:47:25,936 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:47:25,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955305570] [2022-11-23 14:47:25,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955305570] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:47:25,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936121592] [2022-11-23 14:47:25,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:47:25,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:47:25,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:47:25,938 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:47:25,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-23 14:47:26,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:47:26,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-23 14:47:26,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:47:26,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2022-11-23 14:47:26,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:26,387 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-11-23 14:47:26,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:47:27,001 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:47:27,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:47:27,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-11-23 14:47:27,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 138 [2022-11-23 14:47:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:47:28,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936121592] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:47:28,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [837115342] [2022-11-23 14:47:28,182 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:47:28,182 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:47:28,183 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:47:28,183 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:47:28,183 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:47:28,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:28,233 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:47:28,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:47:28,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:28,255 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:47:28,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:28,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:47:28,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:28,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:47:28,364 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:47:28,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 244 treesize of output 246 [2022-11-23 14:47:28,453 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:47:28,566 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:47:28,574 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:47:29,888 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5116#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:47:29,888 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:47:29,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:47:29,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 44 [2022-11-23 14:47:29,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735971837] [2022-11-23 14:47:29,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:47:29,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-11-23 14:47:29,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:47:29,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-11-23 14:47:29,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=2492, Unknown=0, NotChecked=0, Total=2652 [2022-11-23 14:47:29,910 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 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 14:47:32,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:47:32,172 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2022-11-23 14:47:32,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-23 14:47:32,173 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 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 43 [2022-11-23 14:47:32,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:47:32,173 INFO L225 Difference]: With dead ends: 52 [2022-11-23 14:47:32,173 INFO L226 Difference]: Without dead ends: 50 [2022-11-23 14:47:32,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=332, Invalid=4360, Unknown=0, NotChecked=0, Total=4692 [2022-11-23 14:47:32,175 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 70 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:47:32,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 279 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1090 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-23 14:47:32,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-23 14:47:32,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2022-11-23 14:47:32,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 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 14:47:32,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-11-23 14:47:32,189 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 43 [2022-11-23 14:47:32,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:47:32,189 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-11-23 14:47:32,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 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 14:47:32,190 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-11-23 14:47:32,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-23 14:47:32,190 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:47:32,190 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 8, 7, 7, 1, 1, 1, 1, 1] [2022-11-23 14:47:32,199 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-11-23 14:47:32,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:47:32,391 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:47:32,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:47:32,392 INFO L85 PathProgramCache]: Analyzing trace with hash -2125856491, now seen corresponding path program 14 times [2022-11-23 14:47:32,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:47:32,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899433170] [2022-11-23 14:47:32,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:47:32,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:47:32,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:47:33,462 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 167 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:47:33,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:47:33,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899433170] [2022-11-23 14:47:33,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899433170] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:47:33,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702330962] [2022-11-23 14:47:33,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:47:33,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:47:33,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:47:33,471 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:47:33,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-23 14:47:33,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-23 14:47:33,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:47:33,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 51 conjunts are in the unsatisfiable core [2022-11-23 14:47:33,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:47:33,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:47:34,952 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-23 14:47:34,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-23 14:47:34,999 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 70 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:47:35,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:47:36,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-23 14:47:36,016 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-11-23 14:47:36,839 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 57 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:47:36,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702330962] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:47:36,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [247181510] [2022-11-23 14:47:36,841 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:47:36,841 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:47:36,841 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:47:36,841 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:47:36,842 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:47:36,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:36,888 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 14:47:36,889 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-23 14:47:36,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:36,934 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:47:36,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:47:36,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:36,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:47:37,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:37,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:47:37,049 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:47:37,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 244 treesize of output 246 [2022-11-23 14:47:37,141 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:47:37,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:47:37,267 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:47:38,638 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5619#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:47:38,638 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:47:38,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:47:38,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 52 [2022-11-23 14:47:38,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849870343] [2022-11-23 14:47:38,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:47:38,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-23 14:47:38,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:47:38,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-23 14:47:38,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=3175, Unknown=0, NotChecked=0, Total=3540 [2022-11-23 14:47:38,643 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 53 states, 53 states have (on average 2.30188679245283) internal successors, (122), 52 states have internal predecessors, (122), 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 14:47:40,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:47:40,669 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2022-11-23 14:47:40,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-23 14:47:40,670 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.30188679245283) internal successors, (122), 52 states have internal predecessors, (122), 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 46 [2022-11-23 14:47:40,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:47:40,671 INFO L225 Difference]: With dead ends: 77 [2022-11-23 14:47:40,671 INFO L226 Difference]: Without dead ends: 49 [2022-11-23 14:47:40,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=677, Invalid=5329, Unknown=0, NotChecked=0, Total=6006 [2022-11-23 14:47:40,672 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 88 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:47:40,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 180 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-23 14:47:40,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-11-23 14:47:40,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-11-23 14:47:40,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0625) internal successors, (51), 48 states have internal predecessors, (51), 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 14:47:40,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2022-11-23 14:47:40,692 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 46 [2022-11-23 14:47:40,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:47:40,692 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2022-11-23 14:47:40,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.30188679245283) internal successors, (122), 52 states have internal predecessors, (122), 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 14:47:40,693 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2022-11-23 14:47:40,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-23 14:47:40,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:47:40,694 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 8, 7, 7, 1, 1, 1, 1, 1] [2022-11-23 14:47:40,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-23 14:47:40,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:47:40,895 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:47:40,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:47:40,895 INFO L85 PathProgramCache]: Analyzing trace with hash 411031245, now seen corresponding path program 2 times [2022-11-23 14:47:40,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:47:40,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411461937] [2022-11-23 14:47:40,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:47:40,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:47:40,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:47:41,210 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-23 14:47:41,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:47:41,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411461937] [2022-11-23 14:47:41,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411461937] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:47:41,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101256555] [2022-11-23 14:47:41,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:47:41,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:47:41,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:47:41,215 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:47:41,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-23 14:47:41,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-11-23 14:47:41,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:47:41,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-23 14:47:41,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:47:41,765 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-23 14:47:41,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:47:42,048 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-11-23 14:47:42,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101256555] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:47:42,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1204225851] [2022-11-23 14:47:42,050 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:47:42,050 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:47:42,051 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:47:42,051 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:47:42,051 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:47:42,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:42,104 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:47:42,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:47:42,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:42,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:47:42,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:42,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 37 [2022-11-23 14:47:42,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:42,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:42,218 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-23 14:47:42,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 257 treesize of output 253 [2022-11-23 14:47:42,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:47:42,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:47:42,437 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:47:43,440 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6146#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 99999 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:47:43,440 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:47:43,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:47:43,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2022-11-23 14:47:43,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378656453] [2022-11-23 14:47:43,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:47:43,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-23 14:47:43,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:47:43,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-23 14:47:43,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=1147, Unknown=0, NotChecked=0, Total=1722 [2022-11-23 14:47:43,443 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 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 14:47:43,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:47:43,764 INFO L93 Difference]: Finished difference Result 410 states and 435 transitions. [2022-11-23 14:47:43,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-23 14:47:43,767 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 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 47 [2022-11-23 14:47:43,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:47:43,769 INFO L225 Difference]: With dead ends: 410 [2022-11-23 14:47:43,769 INFO L226 Difference]: Without dead ends: 384 [2022-11-23 14:47:43,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=575, Invalid=1147, Unknown=0, NotChecked=0, Total=1722 [2022-11-23 14:47:43,771 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 222 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:47:43,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 104 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:47:43,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-11-23 14:47:43,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 72. [2022-11-23 14:47:43,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1971830985915493) internal successors, (85), 71 states have internal predecessors, (85), 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 14:47:43,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2022-11-23 14:47:43,809 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 47 [2022-11-23 14:47:43,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:47:43,810 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2022-11-23 14:47:43,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.057142857142857) internal successors, (72), 34 states have internal predecessors, (72), 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 14:47:43,810 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2022-11-23 14:47:43,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-23 14:47:43,811 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:47:43,811 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 8, 7, 7, 1, 1, 1, 1, 1] [2022-11-23 14:47:43,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-23 14:47:44,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:47:44,018 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:47:44,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:47:44,019 INFO L85 PathProgramCache]: Analyzing trace with hash 853617614, now seen corresponding path program 15 times [2022-11-23 14:47:44,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:47:44,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465202845] [2022-11-23 14:47:44,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:47:44,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:47:44,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:47:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:47:44,974 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:47:44,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465202845] [2022-11-23 14:47:44,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465202845] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:47:44,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970769621] [2022-11-23 14:47:44,975 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:47:44,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:47:44,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:47:44,977 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:47:45,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-23 14:47:45,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:47:45,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:47:45,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 61 conjunts are in the unsatisfiable core [2022-11-23 14:47:45,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:47:45,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:47:45,463 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-23 14:47:45,463 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 27 treesize of output 26 [2022-11-23 14:47:45,960 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-23 14:47:45,999 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:47:45,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:47:46,619 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-11-23 14:47:46,634 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 138 [2022-11-23 14:47:47,312 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:47:47,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970769621] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:47:47,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1668309059] [2022-11-23 14:47:47,314 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:47:47,314 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:47:47,314 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:47:47,314 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:47:47,314 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:47:47,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:47,361 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 14:47:47,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-23 14:47:47,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:47,407 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:47:47,408 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:47:47,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:47,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:47:47,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:47,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:47:47,519 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:47:47,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 244 treesize of output 246 [2022-11-23 14:47:47,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:47:47,746 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:47:47,752 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:47:49,234 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7136#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:47:49,234 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:47:49,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:47:49,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 52 [2022-11-23 14:47:49,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561164851] [2022-11-23 14:47:49,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:47:49,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-23 14:47:49,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:47:49,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-23 14:47:49,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=3342, Unknown=0, NotChecked=0, Total=3540 [2022-11-23 14:47:49,236 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 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 14:47:51,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:47:51,797 INFO L93 Difference]: Finished difference Result 79 states and 92 transitions. [2022-11-23 14:47:51,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-23 14:47:51,797 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 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 48 [2022-11-23 14:47:51,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:47:51,798 INFO L225 Difference]: With dead ends: 79 [2022-11-23 14:47:51,798 INFO L226 Difference]: Without dead ends: 77 [2022-11-23 14:47:51,799 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1278 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=449, Invalid=6031, Unknown=0, NotChecked=0, Total=6480 [2022-11-23 14:47:51,800 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 48 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 1344 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:47:51,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 292 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1344 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 14:47:51,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-11-23 14:47:51,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2022-11-23 14:47:51,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1891891891891893) internal successors, (88), 74 states have internal predecessors, (88), 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 14:47:51,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2022-11-23 14:47:51,832 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 48 [2022-11-23 14:47:51,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:47:51,832 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2022-11-23 14:47:51,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 52 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 14:47:51,832 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2022-11-23 14:47:51,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-11-23 14:47:51,833 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:47:51,833 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 9, 8, 8, 1, 1, 1, 1, 1] [2022-11-23 14:47:51,839 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-23 14:47:52,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:47:52,034 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:47:52,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:47:52,034 INFO L85 PathProgramCache]: Analyzing trace with hash -373897786, now seen corresponding path program 16 times [2022-11-23 14:47:52,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:47:52,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954851952] [2022-11-23 14:47:52,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:47:52,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:47:52,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:47:53,153 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:47:53,153 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:47:53,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954851952] [2022-11-23 14:47:53,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954851952] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:47:53,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770757024] [2022-11-23 14:47:53,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:47:53,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:47:53,154 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:47:53,155 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:47:53,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-23 14:47:53,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:47:53,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-23 14:47:53,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:47:53,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:47:54,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:47:54,737 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:47:54,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:47:55,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-23 14:47:55,328 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-23 14:47:56,001 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:47:56,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770757024] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:47:56,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1483736599] [2022-11-23 14:47:56,003 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:47:56,003 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:47:56,003 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:47:56,003 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:47:56,004 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:47:56,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:56,046 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:47:56,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:47:56,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:56,056 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:47:56,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:56,075 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 37 [2022-11-23 14:47:56,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:56,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:47:56,154 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-23 14:47:56,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 257 treesize of output 253 [2022-11-23 14:47:56,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:47:56,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:47:56,355 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:47:57,816 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7768#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:47:57,816 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:47:57,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:47:57,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 63 [2022-11-23 14:47:57,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644778811] [2022-11-23 14:47:57,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:47:57,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-11-23 14:47:57,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:47:57,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-11-23 14:47:57,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=4729, Unknown=0, NotChecked=0, Total=4970 [2022-11-23 14:47:57,819 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand has 64 states, 64 states have (on average 2.34375) internal successors, (150), 63 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:47:59,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:47:59,541 INFO L93 Difference]: Finished difference Result 111 states and 124 transitions. [2022-11-23 14:47:59,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-23 14:47:59,541 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.34375) internal successors, (150), 63 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2022-11-23 14:47:59,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:47:59,542 INFO L225 Difference]: With dead ends: 111 [2022-11-23 14:47:59,542 INFO L226 Difference]: Without dead ends: 109 [2022-11-23 14:47:59,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=358, Invalid=6448, Unknown=0, NotChecked=0, Total=6806 [2022-11-23 14:47:59,544 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 1714 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:47:59,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 550 Invalid, 1716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1714 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-23 14:47:59,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-11-23 14:47:59,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 79. [2022-11-23 14:47:59,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1794871794871795) internal successors, (92), 78 states have internal predecessors, (92), 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 14:47:59,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 92 transitions. [2022-11-23 14:47:59,573 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 92 transitions. Word has length 51 [2022-11-23 14:47:59,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:47:59,573 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 92 transitions. [2022-11-23 14:47:59,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.34375) internal successors, (150), 63 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 14:47:59,574 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 92 transitions. [2022-11-23 14:47:59,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-11-23 14:47:59,574 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:47:59,574 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 9, 8, 8, 1, 1, 1, 1, 1] [2022-11-23 14:47:59,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-23 14:47:59,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-11-23 14:47:59,775 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:47:59,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:47:59,775 INFO L85 PathProgramCache]: Analyzing trace with hash -2051381587, now seen corresponding path program 17 times [2022-11-23 14:47:59,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:47:59,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810654751] [2022-11-23 14:47:59,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:47:59,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:47:59,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:48:00,900 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:48:00,901 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:48:00,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810654751] [2022-11-23 14:48:00,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810654751] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:48:00,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342949925] [2022-11-23 14:48:00,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:48:00,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:48:00,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:48:00,902 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:48:00,909 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-23 14:48:01,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-11-23 14:48:01,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:48:01,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 66 conjunts are in the unsatisfiable core [2022-11-23 14:48:01,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:48:01,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:48:01,599 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-23 14:48:01,600 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 27 treesize of output 26 [2022-11-23 14:48:02,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-23 14:48:02,210 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:48:02,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:48:02,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-11-23 14:48:02,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-11-23 14:48:03,602 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:48:03,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342949925] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:48:03,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2141438089] [2022-11-23 14:48:03,604 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:48:03,604 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:48:03,604 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:48:03,605 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:48:03,605 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:48:03,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:03,659 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 14:48:03,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-23 14:48:03,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:03,701 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:48:03,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:48:03,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:03,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:48:03,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:03,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:48:03,802 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:48:03,802 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 244 treesize of output 246 [2022-11-23 14:48:03,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:48:03,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:48:03,992 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:48:05,516 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8435#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:48:05,516 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:48:05,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:48:05,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 57 [2022-11-23 14:48:05,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441209562] [2022-11-23 14:48:05,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:48:05,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-11-23 14:48:05,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:48:05,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-11-23 14:48:05,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=3946, Unknown=0, NotChecked=0, Total=4160 [2022-11-23 14:48:05,519 INFO L87 Difference]: Start difference. First operand 79 states and 92 transitions. Second operand has 58 states, 58 states have (on average 2.310344827586207) internal successors, (134), 57 states have internal predecessors, (134), 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 14:48:08,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:48:08,500 INFO L93 Difference]: Finished difference Result 109 states and 122 transitions. [2022-11-23 14:48:08,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-23 14:48:08,500 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.310344827586207) internal successors, (134), 57 states have internal predecessors, (134), 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 53 [2022-11-23 14:48:08,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:48:08,501 INFO L225 Difference]: With dead ends: 109 [2022-11-23 14:48:08,501 INFO L226 Difference]: Without dead ends: 107 [2022-11-23 14:48:08,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1496 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=488, Invalid=7168, Unknown=0, NotChecked=0, Total=7656 [2022-11-23 14:48:08,503 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 1540 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:48:08,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 337 Invalid, 1556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1540 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-23 14:48:08,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-11-23 14:48:08,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 78. [2022-11-23 14:48:08,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 77 states have internal predecessors, (91), 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 14:48:08,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2022-11-23 14:48:08,530 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 53 [2022-11-23 14:48:08,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:48:08,531 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2022-11-23 14:48:08,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.310344827586207) internal successors, (134), 57 states have internal predecessors, (134), 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 14:48:08,531 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2022-11-23 14:48:08,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-23 14:48:08,532 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:48:08,532 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 9, 1, 1, 1, 1, 1] [2022-11-23 14:48:08,538 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-23 14:48:08,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-23 14:48:08,738 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:48:08,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:48:08,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1933621042, now seen corresponding path program 18 times [2022-11-23 14:48:08,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:48:08,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856240509] [2022-11-23 14:48:08,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:48:08,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:48:08,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:48:09,233 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 101 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:48:09,234 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:48:09,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856240509] [2022-11-23 14:48:09,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856240509] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:48:09,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692061076] [2022-11-23 14:48:09,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:48:09,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:48:09,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:48:09,236 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:48:09,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-23 14:48:09,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:48:09,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:48:09,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-23 14:48:09,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:48:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 126 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:48:10,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:48:10,352 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 126 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:48:10,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692061076] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:48:10,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [368147159] [2022-11-23 14:48:10,353 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:48:10,354 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:48:10,354 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:48:10,354 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:48:10,354 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:48:10,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:10,402 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:48:10,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:48:10,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:10,413 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:48:10,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:10,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 37 [2022-11-23 14:48:10,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:10,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:10,516 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-23 14:48:10,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 257 treesize of output 253 [2022-11-23 14:48:10,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:48:10,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:48:10,685 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:48:11,729 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9104#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:48:11,729 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:48:11,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:48:11,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 34 [2022-11-23 14:48:11,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330690135] [2022-11-23 14:48:11,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:48:11,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-23 14:48:11,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:48:11,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-23 14:48:11,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=1410, Unknown=0, NotChecked=0, Total=1722 [2022-11-23 14:48:11,732 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 34 states have internal predecessors, (90), 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 14:48:11,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:48:11,999 INFO L93 Difference]: Finished difference Result 112 states and 125 transitions. [2022-11-23 14:48:11,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-23 14:48:12,000 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 34 states have internal predecessors, (90), 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 54 [2022-11-23 14:48:12,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:48:12,000 INFO L225 Difference]: With dead ends: 112 [2022-11-23 14:48:12,001 INFO L226 Difference]: Without dead ends: 78 [2022-11-23 14:48:12,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 20 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=312, Invalid=1410, Unknown=0, NotChecked=0, Total=1722 [2022-11-23 14:48:12,002 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:48:12,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 108 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:48:12,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-11-23 14:48:12,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-11-23 14:48:12,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1688311688311688) internal successors, (90), 77 states have internal predecessors, (90), 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 14:48:12,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 90 transitions. [2022-11-23 14:48:12,033 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 90 transitions. Word has length 54 [2022-11-23 14:48:12,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:48:12,033 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 90 transitions. [2022-11-23 14:48:12,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 34 states have internal predecessors, (90), 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 14:48:12,034 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 90 transitions. [2022-11-23 14:48:12,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-11-23 14:48:12,034 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:48:12,035 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 10, 9, 9, 1, 1, 1, 1, 1] [2022-11-23 14:48:12,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-23 14:48:12,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:48:12,241 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:48:12,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:48:12,242 INFO L85 PathProgramCache]: Analyzing trace with hash 385919623, now seen corresponding path program 19 times [2022-11-23 14:48:12,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:48:12,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795782210] [2022-11-23 14:48:12,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:48:12,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:48:12,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:48:13,404 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:48:13,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:48:13,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795782210] [2022-11-23 14:48:13,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795782210] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:48:13,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419926562] [2022-11-23 14:48:13,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:48:13,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:48:13,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:48:13,408 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:48:13,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-23 14:48:13,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:48:13,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-23 14:48:13,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:48:14,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:48:15,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:48:15,179 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:48:15,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:48:15,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-23 14:48:15,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-23 14:48:16,779 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 0 proven. 258 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:48:16,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419926562] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:48:16,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1424913613] [2022-11-23 14:48:16,781 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:48:16,781 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:48:16,781 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:48:16,781 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:48:16,782 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:48:16,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:16,827 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 14:48:16,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-23 14:48:16,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:16,875 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:48:16,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:48:16,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:16,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-23 14:48:16,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:16,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:48:16,993 INFO L321 Elim1Store]: treesize reduction 74, result has 30.8 percent of original size [2022-11-23 14:48:16,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 263 treesize of output 269 [2022-11-23 14:48:17,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:48:17,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:48:17,214 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:48:18,839 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9778#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:48:18,839 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:48:18,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:48:18,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 69 [2022-11-23 14:48:18,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323713878] [2022-11-23 14:48:18,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:48:18,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-11-23 14:48:18,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:48:18,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-11-23 14:48:18,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=5594, Unknown=0, NotChecked=0, Total=5852 [2022-11-23 14:48:18,842 INFO L87 Difference]: Start difference. First operand 78 states and 90 transitions. Second operand has 70 states, 70 states have (on average 2.357142857142857) internal successors, (165), 69 states have internal predecessors, (165), 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 14:48:21,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:48:21,137 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2022-11-23 14:48:21,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-23 14:48:21,137 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.357142857142857) internal successors, (165), 69 states have internal predecessors, (165), 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 56 [2022-11-23 14:48:21,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:48:21,138 INFO L225 Difference]: With dead ends: 117 [2022-11-23 14:48:21,138 INFO L226 Difference]: Without dead ends: 115 [2022-11-23 14:48:21,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1748 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=390, Invalid=7800, Unknown=0, NotChecked=0, Total=8190 [2022-11-23 14:48:21,139 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 78 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 2032 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 2034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:48:21,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 641 Invalid, 2034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2032 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-23 14:48:21,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-23 14:48:21,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 82. [2022-11-23 14:48:21,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1604938271604939) internal successors, (94), 81 states have internal predecessors, (94), 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 14:48:21,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2022-11-23 14:48:21,171 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 56 [2022-11-23 14:48:21,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:48:21,171 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2022-11-23 14:48:21,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.357142857142857) internal successors, (165), 69 states have internal predecessors, (165), 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 14:48:21,171 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2022-11-23 14:48:21,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-23 14:48:21,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:48:21,172 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 10, 9, 9, 1, 1, 1, 1, 1] [2022-11-23 14:48:21,179 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-11-23 14:48:21,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-23 14:48:21,373 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:48:21,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:48:21,373 INFO L85 PathProgramCache]: Analyzing trace with hash 376472064, now seen corresponding path program 20 times [2022-11-23 14:48:21,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:48:21,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39988759] [2022-11-23 14:48:21,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:48:21,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:48:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:48:22,781 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:48:22,781 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:48:22,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39988759] [2022-11-23 14:48:22,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39988759] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:48:22,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553353955] [2022-11-23 14:48:22,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:48:22,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:48:22,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:48:22,787 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:48:22,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-23 14:48:23,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-11-23 14:48:23,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:48:23,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 71 conjunts are in the unsatisfiable core [2022-11-23 14:48:23,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:48:23,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:48:23,437 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-23 14:48:23,437 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 27 treesize of output 26 [2022-11-23 14:48:24,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-23 14:48:24,169 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:48:24,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:48:25,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-11-23 14:48:25,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-11-23 14:48:25,918 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:48:25,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553353955] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:48:25,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [880947521] [2022-11-23 14:48:25,920 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:48:25,920 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:48:25,921 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:48:25,921 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:48:25,921 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:48:25,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:25,973 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:48:25,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:48:25,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:25,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:48:26,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:26,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 37 [2022-11-23 14:48:26,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:26,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:26,099 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-23 14:48:26,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 257 treesize of output 253 [2022-11-23 14:48:26,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:48:26,296 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 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:48:26,303 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:48:27,983 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10496#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:48:27,983 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:48:27,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:48:27,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 62 [2022-11-23 14:48:27,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768932530] [2022-11-23 14:48:27,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:48:27,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-11-23 14:48:27,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:48:27,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-11-23 14:48:27,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=4600, Unknown=0, NotChecked=0, Total=4830 [2022-11-23 14:48:27,985 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand has 63 states, 63 states have (on average 2.3333333333333335) internal successors, (147), 62 states have internal predecessors, (147), 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 14:48:31,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:48:31,332 INFO L93 Difference]: Finished difference Result 115 states and 127 transitions. [2022-11-23 14:48:31,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-23 14:48:31,332 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.3333333333333335) internal successors, (147), 62 states have internal predecessors, (147), 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 58 [2022-11-23 14:48:31,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:48:31,333 INFO L225 Difference]: With dead ends: 115 [2022-11-23 14:48:31,333 INFO L226 Difference]: Without dead ends: 113 [2022-11-23 14:48:31,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=527, Invalid=8403, Unknown=0, NotChecked=0, Total=8930 [2022-11-23 14:48:31,335 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 99 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 1806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:48:31,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 385 Invalid, 1806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1791 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-11-23 14:48:31,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-23 14:48:31,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 81. [2022-11-23 14:48:31,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1625) internal successors, (93), 80 states have internal predecessors, (93), 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 14:48:31,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2022-11-23 14:48:31,369 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 58 [2022-11-23 14:48:31,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:48:31,369 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2022-11-23 14:48:31,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.3333333333333335) internal successors, (147), 62 states have internal predecessors, (147), 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 14:48:31,369 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2022-11-23 14:48:31,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-11-23 14:48:31,370 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:48:31,370 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 10, 1, 1, 1, 1, 1] [2022-11-23 14:48:31,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-23 14:48:31,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-23 14:48:31,570 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:48:31,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:48:31,571 INFO L85 PathProgramCache]: Analyzing trace with hash -690839443, now seen corresponding path program 21 times [2022-11-23 14:48:31,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:48:31,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78431524] [2022-11-23 14:48:31,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:48:31,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:48:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:48:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 127 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:48:32,198 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:48:32,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78431524] [2022-11-23 14:48:32,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78431524] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:48:32,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290083979] [2022-11-23 14:48:32,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:48:32,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:48:32,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:48:32,202 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:48:32,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-23 14:48:32,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:48:32,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:48:32,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-23 14:48:32,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:48:33,148 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 155 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:48:33,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:48:33,526 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 155 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:48:33,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290083979] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:48:33,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [73962016] [2022-11-23 14:48:33,527 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:48:33,527 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:48:33,528 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:48:33,528 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:48:33,528 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:48:33,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:33,571 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 14:48:33,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-23 14:48:33,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:33,615 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:48:33,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:48:33,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:33,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:48:33,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:33,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:48:33,725 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:48:33,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 250 [2022-11-23 14:48:33,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:48:33,897 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:48:33,904 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:48:34,958 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11214#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:48:34,958 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:48:34,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:48:34,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 37 [2022-11-23 14:48:34,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838239713] [2022-11-23 14:48:34,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:48:34,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-23 14:48:34,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:48:34,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-23 14:48:34,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=1618, Unknown=0, NotChecked=0, Total=1980 [2022-11-23 14:48:34,960 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand has 38 states, 38 states have (on average 2.5789473684210527) internal successors, (98), 37 states have internal predecessors, (98), 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 14:48:35,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:48:35,253 INFO L93 Difference]: Finished difference Result 118 states and 130 transitions. [2022-11-23 14:48:35,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-23 14:48:35,253 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5789473684210527) internal successors, (98), 37 states have internal predecessors, (98), 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 59 [2022-11-23 14:48:35,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:48:35,254 INFO L225 Difference]: With dead ends: 118 [2022-11-23 14:48:35,254 INFO L226 Difference]: Without dead ends: 81 [2022-11-23 14:48:35,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 134 SyntacticMatches, 22 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1156 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=362, Invalid=1618, Unknown=0, NotChecked=0, Total=1980 [2022-11-23 14:48:35,255 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:48:35,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 111 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:48:35,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-11-23 14:48:35,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-11-23 14:48:35,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.15) internal successors, (92), 80 states have internal predecessors, (92), 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 14:48:35,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2022-11-23 14:48:35,290 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 59 [2022-11-23 14:48:35,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:48:35,291 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2022-11-23 14:48:35,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.5789473684210527) internal successors, (98), 37 states have internal predecessors, (98), 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 14:48:35,291 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2022-11-23 14:48:35,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-11-23 14:48:35,292 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:48:35,292 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 11, 10, 10, 1, 1, 1, 1, 1] [2022-11-23 14:48:35,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-11-23 14:48:35,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-23 14:48:35,499 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:48:35,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:48:35,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1324771924, now seen corresponding path program 22 times [2022-11-23 14:48:35,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:48:35,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135173943] [2022-11-23 14:48:35,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:48:35,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:48:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:48:36,935 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:48:36,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:48:36,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135173943] [2022-11-23 14:48:36,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135173943] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:48:36,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643632912] [2022-11-23 14:48:36,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:48:36,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:48:36,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:48:36,939 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:48:36,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-11-23 14:48:37,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:48:37,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 70 conjunts are in the unsatisfiable core [2022-11-23 14:48:37,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:48:37,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:48:38,969 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:48:39,027 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:48:39,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:48:39,876 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-23 14:48:39,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-23 14:48:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:48:41,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643632912] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:48:41,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [417294747] [2022-11-23 14:48:41,014 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:48:41,014 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:48:41,014 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:48:41,015 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:48:41,015 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:48:41,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:41,055 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:48:41,055 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:48:41,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:41,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:48:41,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:41,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:48:41,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:41,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:48:41,168 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:48:41,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 244 treesize of output 246 [2022-11-23 14:48:41,232 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:48:41,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:48:41,331 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:48:42,847 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11936#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:48:42,848 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:48:42,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:48:42,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 75 [2022-11-23 14:48:42,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434404380] [2022-11-23 14:48:42,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:48:42,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-11-23 14:48:42,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:48:42,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-11-23 14:48:42,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=6527, Unknown=0, NotChecked=0, Total=6806 [2022-11-23 14:48:42,850 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand has 76 states, 76 states have (on average 2.3684210526315788) internal successors, (180), 75 states have internal predecessors, (180), 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 14:48:45,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:48:45,075 INFO L93 Difference]: Finished difference Result 123 states and 134 transitions. [2022-11-23 14:48:45,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-11-23 14:48:45,075 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.3684210526315788) internal successors, (180), 75 states have internal predecessors, (180), 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 61 [2022-11-23 14:48:45,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:48:45,076 INFO L225 Difference]: With dead ends: 123 [2022-11-23 14:48:45,076 INFO L226 Difference]: Without dead ends: 121 [2022-11-23 14:48:45,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2031 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=421, Invalid=9085, Unknown=0, NotChecked=0, Total=9506 [2022-11-23 14:48:45,077 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 88 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 2357 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 2359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:48:45,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 730 Invalid, 2359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2357 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-11-23 14:48:45,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-11-23 14:48:45,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 85. [2022-11-23 14:48:45,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1428571428571428) internal successors, (96), 84 states have internal predecessors, (96), 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 14:48:45,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2022-11-23 14:48:45,114 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 61 [2022-11-23 14:48:45,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:48:45,115 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2022-11-23 14:48:45,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.3684210526315788) internal successors, (180), 75 states have internal predecessors, (180), 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 14:48:45,115 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2022-11-23 14:48:45,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-11-23 14:48:45,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:48:45,116 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 11, 10, 10, 1, 1, 1, 1, 1] [2022-11-23 14:48:45,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-11-23 14:48:45,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-23 14:48:45,323 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:48:45,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:48:45,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1297045115, now seen corresponding path program 23 times [2022-11-23 14:48:45,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:48:45,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368121544] [2022-11-23 14:48:45,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:48:45,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:48:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:48:46,687 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:48:46,687 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:48:46,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368121544] [2022-11-23 14:48:46,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368121544] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:48:46,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777983083] [2022-11-23 14:48:46,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:48:46,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:48:46,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:48:46,691 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:48:46,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-11-23 14:48:47,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-11-23 14:48:47,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:48:47,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 78 conjunts are in the unsatisfiable core [2022-11-23 14:48:47,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:48:47,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:48:48,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:48,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-23 14:48:49,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:48:49,089 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:48:49,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:48:50,069 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-11-23 14:48:50,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-11-23 14:48:51,068 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 0 proven. 337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:48:51,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777983083] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:48:51,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [182630033] [2022-11-23 14:48:51,070 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:48:51,070 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:48:51,070 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:48:51,070 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:48:51,070 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:48:51,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:51,106 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 14:48:51,107 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-23 14:48:51,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:51,145 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:48:51,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:48:51,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:51,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:48:51,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:51,241 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:48:51,268 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:48:51,269 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 244 treesize of output 246 [2022-11-23 14:48:51,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:48:51,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:48:51,470 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:48:53,174 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12716#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:48:53,174 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:48:53,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:48:53,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 80 [2022-11-23 14:48:53,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616197818] [2022-11-23 14:48:53,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:48:53,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-11-23 14:48:53,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:48:53,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-11-23 14:48:53,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=7344, Unknown=0, NotChecked=0, Total=7656 [2022-11-23 14:48:53,176 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand has 81 states, 81 states have (on average 2.2962962962962963) internal successors, (186), 80 states have internal predecessors, (186), 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 14:48:56,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:48:56,673 INFO L93 Difference]: Finished difference Result 121 states and 132 transitions. [2022-11-23 14:48:56,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-11-23 14:48:56,673 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.2962962962962963) internal successors, (186), 80 states have internal predecessors, (186), 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 63 [2022-11-23 14:48:56,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:48:56,674 INFO L225 Difference]: With dead ends: 121 [2022-11-23 14:48:56,674 INFO L226 Difference]: Without dead ends: 119 [2022-11-23 14:48:56,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3061 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=666, Invalid=12674, Unknown=0, NotChecked=0, Total=13340 [2022-11-23 14:48:56,676 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 67 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 2539 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 2556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:48:56,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 595 Invalid, 2556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2539 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-23 14:48:56,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-23 14:48:56,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 84. [2022-11-23 14:48:56,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.144578313253012) internal successors, (95), 83 states have internal predecessors, (95), 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 14:48:56,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 95 transitions. [2022-11-23 14:48:56,721 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 95 transitions. Word has length 63 [2022-11-23 14:48:56,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:48:56,721 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 95 transitions. [2022-11-23 14:48:56,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.2962962962962963) internal successors, (186), 80 states have internal predecessors, (186), 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 14:48:56,722 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 95 transitions. [2022-11-23 14:48:56,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-23 14:48:56,722 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:48:56,722 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 11, 11, 1, 1, 1, 1, 1] [2022-11-23 14:48:56,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-11-23 14:48:56,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:48:56,927 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:48:56,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:48:56,927 INFO L85 PathProgramCache]: Analyzing trace with hash -168971904, now seen corresponding path program 24 times [2022-11-23 14:48:56,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:48:56,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155869597] [2022-11-23 14:48:56,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:48:56,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:48:56,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:48:57,628 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 156 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:48:57,628 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:48:57,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155869597] [2022-11-23 14:48:57,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155869597] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:48:57,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262961548] [2022-11-23 14:48:57,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:48:57,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:48:57,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:48:57,631 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:48:57,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-11-23 14:48:57,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:48:57,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:48:57,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 26 conjunts are in the unsatisfiable core [2022-11-23 14:48:57,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:48:58,521 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 187 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:48:58,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:48:58,929 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 187 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:48:58,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262961548] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:48:58,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [399470958] [2022-11-23 14:48:58,931 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:48:58,931 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:48:58,931 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:48:58,931 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:48:58,931 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:48:58,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:58,978 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:48:58,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:48:58,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:58,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:48:59,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:59,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 14:48:59,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:59,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:48:59,081 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-23 14:48:59,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 251 treesize of output 247 [2022-11-23 14:48:59,138 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:48:59,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:48:59,269 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:49:00,412 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13485#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:49:00,412 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:49:00,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:49:00,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 40 [2022-11-23 14:49:00,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861496635] [2022-11-23 14:49:00,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:49:00,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-23 14:49:00,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:49:00,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-23 14:49:00,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1837, Unknown=0, NotChecked=0, Total=2256 [2022-11-23 14:49:00,414 INFO L87 Difference]: Start difference. First operand 84 states and 95 transitions. Second operand has 41 states, 41 states have (on average 2.5853658536585367) internal successors, (106), 40 states have internal predecessors, (106), 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 14:49:00,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:49:00,708 INFO L93 Difference]: Finished difference Result 124 states and 135 transitions. [2022-11-23 14:49:00,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-23 14:49:00,708 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.5853658536585367) internal successors, (106), 40 states have internal predecessors, (106), 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 64 [2022-11-23 14:49:00,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:49:00,709 INFO L225 Difference]: With dead ends: 124 [2022-11-23 14:49:00,709 INFO L226 Difference]: Without dead ends: 84 [2022-11-23 14:49:00,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 146 SyntacticMatches, 24 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=419, Invalid=1837, Unknown=0, NotChecked=0, Total=2256 [2022-11-23 14:49:00,710 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:49:00,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 122 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:49:00,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-11-23 14:49:00,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-11-23 14:49:00,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 83 states have internal predecessors, (94), 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 14:49:00,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2022-11-23 14:49:00,753 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 64 [2022-11-23 14:49:00,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:49:00,753 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2022-11-23 14:49:00,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.5853658536585367) internal successors, (106), 40 states have internal predecessors, (106), 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 14:49:00,753 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2022-11-23 14:49:00,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-11-23 14:49:00,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:49:00,754 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 12, 11, 11, 1, 1, 1, 1, 1] [2022-11-23 14:49:00,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-11-23 14:49:00,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:49:00,955 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:49:00,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:49:00,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1544617991, now seen corresponding path program 25 times [2022-11-23 14:49:00,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:49:00,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094571374] [2022-11-23 14:49:00,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:49:00,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:49:00,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:49:02,778 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:49:02,778 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:49:02,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094571374] [2022-11-23 14:49:02,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094571374] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:49:02,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058675520] [2022-11-23 14:49:02,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:49:02,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:49:02,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:49:02,780 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:49:02,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-11-23 14:49:02,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:49:02,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-23 14:49:02,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:49:03,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:49:03,758 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:49:03,791 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:49:03,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:49:04,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-23 14:49:04,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-23 14:49:05,386 INFO L134 CoverageAnalysis]: Checked inductivity of 369 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:49:05,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058675520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:49:05,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1722106362] [2022-11-23 14:49:05,388 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:49:05,388 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:49:05,388 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:49:05,388 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:49:05,389 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:49:05,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:49:05,435 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:49:05,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:49:05,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:49:05,448 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:49:05,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:49:05,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-23 14:49:05,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:49:05,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:49:05,563 INFO L321 Elim1Store]: treesize reduction 74, result has 30.8 percent of original size [2022-11-23 14:49:05,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 263 treesize of output 269 [2022-11-23 14:49:05,657 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:49:05,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:49:05,784 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:49:07,288 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14230#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:49:07,289 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:49:07,289 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:49:07,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 56 [2022-11-23 14:49:07,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953850404] [2022-11-23 14:49:07,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:49:07,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-11-23 14:49:07,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:49:07,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-11-23 14:49:07,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=3842, Unknown=0, NotChecked=0, Total=4032 [2022-11-23 14:49:07,291 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 56 states have internal predecessors, (135), 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 14:49:10,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:49:10,036 INFO L93 Difference]: Finished difference Result 129 states and 139 transitions. [2022-11-23 14:49:10,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-23 14:49:10,036 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 56 states have internal predecessors, (135), 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 66 [2022-11-23 14:49:10,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:49:10,037 INFO L225 Difference]: With dead ends: 129 [2022-11-23 14:49:10,037 INFO L226 Difference]: Without dead ends: 127 [2022-11-23 14:49:10,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 157 SyntacticMatches, 5 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=309, Invalid=5853, Unknown=0, NotChecked=0, Total=6162 [2022-11-23 14:49:10,038 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 51 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 2282 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 2284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:49:10,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 683 Invalid, 2284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2282 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-23 14:49:10,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-23 14:49:10,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 88. [2022-11-23 14:49:10,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.1264367816091954) internal successors, (98), 87 states have internal predecessors, (98), 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 14:49:10,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 98 transitions. [2022-11-23 14:49:10,090 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 98 transitions. Word has length 66 [2022-11-23 14:49:10,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:49:10,090 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 98 transitions. [2022-11-23 14:49:10,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 56 states have internal predecessors, (135), 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 14:49:10,091 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 98 transitions. [2022-11-23 14:49:10,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-23 14:49:10,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:49:10,091 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 12, 11, 11, 1, 1, 1, 1, 1] [2022-11-23 14:49:10,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-11-23 14:49:10,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:49:10,292 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:49:10,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:49:10,292 INFO L85 PathProgramCache]: Analyzing trace with hash -690580430, now seen corresponding path program 26 times [2022-11-23 14:49:10,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:49:10,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701719073] [2022-11-23 14:49:10,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:49:10,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:49:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:49:12,222 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 0 proven. 397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:49:12,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:49:12,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701719073] [2022-11-23 14:49:12,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701719073] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:49:12,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962369233] [2022-11-23 14:49:12,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:49:12,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:49:12,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:49:12,225 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:49:12,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-11-23 14:49:12,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-11-23 14:49:12,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:49:12,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 81 conjunts are in the unsatisfiable core [2022-11-23 14:49:12,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:49:13,732 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:49:13,825 INFO L321 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2022-11-23 14:49:13,826 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 24 [2022-11-23 14:49:14,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-23 14:49:14,929 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 0 proven. 397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:49:14,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:49:16,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-11-23 14:49:16,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 138 [2022-11-23 14:49:17,195 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 0 proven. 397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:49:17,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962369233] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:49:17,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [392142815] [2022-11-23 14:49:17,197 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:49:17,197 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:49:17,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:49:17,197 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:49:17,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:49:17,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:49:17,244 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:49:17,245 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:49:17,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:49:17,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:49:17,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:49:17,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:49:17,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:49:17,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:49:17,367 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:49:17,368 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 244 treesize of output 246 [2022-11-23 14:49:17,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:49:17,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:49:17,628 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:49:19,358 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15058#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:49:19,359 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:49:19,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:49:19,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 30] total 86 [2022-11-23 14:49:19,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756386301] [2022-11-23 14:49:19,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:49:19,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-11-23 14:49:19,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:49:19,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-11-23 14:49:19,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=349, Invalid=8393, Unknown=0, NotChecked=0, Total=8742 [2022-11-23 14:49:19,361 INFO L87 Difference]: Start difference. First operand 88 states and 98 transitions. Second operand has 87 states, 87 states have (on average 2.310344827586207) internal successors, (201), 86 states have internal predecessors, (201), 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 14:49:25,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:49:25,067 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2022-11-23 14:49:25,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-23 14:49:25,067 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.310344827586207) internal successors, (201), 86 states have internal predecessors, (201), 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 68 [2022-11-23 14:49:25,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:49:25,068 INFO L225 Difference]: With dead ends: 127 [2022-11-23 14:49:25,068 INFO L226 Difference]: Without dead ends: 125 [2022-11-23 14:49:25,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3748 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=760, Invalid=14492, Unknown=0, NotChecked=0, Total=15252 [2022-11-23 14:49:25,070 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 159 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 2779 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 2797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:49:25,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 623 Invalid, 2797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2779 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-11-23 14:49:25,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-11-23 14:49:25,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 87. [2022-11-23 14:49:25,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.127906976744186) internal successors, (97), 86 states have internal predecessors, (97), 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 14:49:25,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2022-11-23 14:49:25,115 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 68 [2022-11-23 14:49:25,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:49:25,115 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2022-11-23 14:49:25,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.310344827586207) internal successors, (201), 86 states have internal predecessors, (201), 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 14:49:25,116 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2022-11-23 14:49:25,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-23 14:49:25,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:49:25,117 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 12, 12, 1, 1, 1, 1, 1] [2022-11-23 14:49:25,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-11-23 14:49:25,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:49:25,323 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:49:25,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:49:25,324 INFO L85 PathProgramCache]: Analyzing trace with hash 570162619, now seen corresponding path program 27 times [2022-11-23 14:49:25,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:49:25,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558200550] [2022-11-23 14:49:25,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:49:25,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:49:25,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:49:26,048 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 188 proven. 216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:49:26,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:49:26,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558200550] [2022-11-23 14:49:26,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558200550] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:49:26,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064907742] [2022-11-23 14:49:26,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:49:26,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:49:26,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:49:26,050 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:49:26,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-11-23 14:49:26,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:49:26,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:49:26,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-23 14:49:26,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:49:27,000 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 222 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:49:27,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:49:27,502 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 222 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:49:27,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064907742] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:49:27,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [596947813] [2022-11-23 14:49:27,504 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:49:27,504 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:49:27,504 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:49:27,504 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:49:27,505 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:49:27,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:49:27,548 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:49:27,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:49:27,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:49:27,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:49:27,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:49:27,589 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:49:27,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:49:27,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:49:27,675 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:49:27,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 250 [2022-11-23 14:49:27,765 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:49:27,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:49:27,903 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:49:29,070 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15876#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:49:29,070 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:49:29,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:49:29,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 43 [2022-11-23 14:49:29,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236637826] [2022-11-23 14:49:29,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:49:29,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-23 14:49:29,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:49:29,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-23 14:49:29,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=2073, Unknown=0, NotChecked=0, Total=2550 [2022-11-23 14:49:29,073 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand has 44 states, 44 states have (on average 2.590909090909091) internal successors, (114), 43 states have internal predecessors, (114), 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 14:49:29,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:49:29,417 INFO L93 Difference]: Finished difference Result 130 states and 140 transitions. [2022-11-23 14:49:29,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-23 14:49:29,417 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.590909090909091) internal successors, (114), 43 states have internal predecessors, (114), 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 69 [2022-11-23 14:49:29,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:49:29,418 INFO L225 Difference]: With dead ends: 130 [2022-11-23 14:49:29,419 INFO L226 Difference]: Without dead ends: 87 [2022-11-23 14:49:29,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 158 SyntacticMatches, 26 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1520 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=477, Invalid=2073, Unknown=0, NotChecked=0, Total=2550 [2022-11-23 14:49:29,420 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:49:29,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 130 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:49:29,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-23 14:49:29,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-11-23 14:49:29,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.1162790697674418) internal successors, (96), 86 states have internal predecessors, (96), 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 14:49:29,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2022-11-23 14:49:29,480 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 69 [2022-11-23 14:49:29,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:49:29,480 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2022-11-23 14:49:29,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.590909090909091) internal successors, (114), 43 states have internal predecessors, (114), 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 14:49:29,480 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2022-11-23 14:49:29,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-23 14:49:29,481 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:49:29,481 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 13, 12, 12, 1, 1, 1, 1, 1] [2022-11-23 14:49:29,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-11-23 14:49:29,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-11-23 14:49:29,682 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:49:29,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:49:29,682 INFO L85 PathProgramCache]: Analyzing trace with hash -183119134, now seen corresponding path program 28 times [2022-11-23 14:49:29,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:49:29,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675192924] [2022-11-23 14:49:29,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:49:29,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:49:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:49:31,226 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:49:31,226 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:49:31,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675192924] [2022-11-23 14:49:31,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675192924] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:49:31,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135133368] [2022-11-23 14:49:31,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:49:31,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:49:31,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:49:31,228 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:49:31,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-11-23 14:49:31,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:49:31,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 80 conjunts are in the unsatisfiable core [2022-11-23 14:49:31,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:49:32,397 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:49:33,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:49:33,800 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:49:33,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:49:34,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-23 14:49:34,971 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-23 14:49:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:49:36,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135133368] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:49:36,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2092915630] [2022-11-23 14:49:36,399 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:49:36,400 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:49:36,400 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:49:36,400 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:49:36,400 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:49:36,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:49:36,440 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:49:36,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:49:36,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:49:36,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:49:36,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:49:36,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:49:36,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:49:36,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:49:36,547 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:49:36,548 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 250 [2022-11-23 14:49:36,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:49:36,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:49:36,763 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:49:38,668 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16694#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:49:38,668 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:49:38,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:49:38,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 87 [2022-11-23 14:49:38,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412858317] [2022-11-23 14:49:38,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:49:38,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-11-23 14:49:38,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:49:38,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-11-23 14:49:38,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=321, Invalid=8609, Unknown=0, NotChecked=0, Total=8930 [2022-11-23 14:49:38,671 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand has 88 states, 88 states have (on average 2.3863636363636362) internal successors, (210), 87 states have internal predecessors, (210), 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 14:49:42,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:49:42,317 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2022-11-23 14:49:42,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-23 14:49:42,318 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.3863636363636362) internal successors, (210), 87 states have internal predecessors, (210), 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 71 [2022-11-23 14:49:42,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:49:42,319 INFO L225 Difference]: With dead ends: 135 [2022-11-23 14:49:42,319 INFO L226 Difference]: Without dead ends: 133 [2022-11-23 14:49:42,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2660 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=483, Invalid=11949, Unknown=0, NotChecked=0, Total=12432 [2022-11-23 14:49:42,320 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 102 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 3170 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 3172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:49:42,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 962 Invalid, 3172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3170 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-23 14:49:42,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-11-23 14:49:42,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 91. [2022-11-23 14:49:42,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1111111111111112) internal successors, (100), 90 states have internal predecessors, (100), 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 14:49:42,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2022-11-23 14:49:42,378 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 71 [2022-11-23 14:49:42,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:49:42,378 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2022-11-23 14:49:42,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.3863636363636362) internal successors, (210), 87 states have internal predecessors, (210), 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 14:49:42,378 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2022-11-23 14:49:42,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-23 14:49:42,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:49:42,379 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 13, 12, 12, 1, 1, 1, 1, 1] [2022-11-23 14:49:42,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-11-23 14:49:42,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-23 14:49:42,580 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:49:42,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:49:42,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1762589257, now seen corresponding path program 29 times [2022-11-23 14:49:42,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:49:42,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852110226] [2022-11-23 14:49:42,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:49:42,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:49:42,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:49:44,443 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:49:44,443 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:49:44,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852110226] [2022-11-23 14:49:44,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852110226] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:49:44,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144594875] [2022-11-23 14:49:44,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:49:44,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:49:44,444 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:49:44,445 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:49:44,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-11-23 14:49:45,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-23 14:49:45,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:49:45,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-23 14:49:45,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:49:45,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:49:45,527 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-23 14:49:45,527 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 27 treesize of output 26 [2022-11-23 14:49:46,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-23 14:49:46,575 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:49:46,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:49:47,685 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-11-23 14:49:47,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-11-23 14:49:49,072 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:49:49,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144594875] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:49:49,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1109689838] [2022-11-23 14:49:49,073 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:49:49,074 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:49:49,074 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:49:49,074 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:49:49,074 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:49:49,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:49:49,123 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 14:49:49,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-23 14:49:49,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:49:49,190 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:49:49,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:49:49,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:49:49,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:49:49,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:49:49,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:49:49,313 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:49:49,314 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 250 [2022-11-23 14:49:49,406 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:49:49,530 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:49:49,538 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:49:51,474 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17559#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:49:51,474 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:49:51,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:49:51,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32, 32] total 77 [2022-11-23 14:49:51,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884270878] [2022-11-23 14:49:51,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:49:51,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-11-23 14:49:51,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:49:51,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-11-23 14:49:51,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=6862, Unknown=0, NotChecked=0, Total=7140 [2022-11-23 14:49:51,477 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 78 states, 78 states have (on average 2.3846153846153846) internal successors, (186), 77 states have internal predecessors, (186), 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 14:49:57,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:49:57,136 INFO L93 Difference]: Finished difference Result 133 states and 142 transitions. [2022-11-23 14:49:57,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-23 14:49:57,137 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.3846153846153846) internal successors, (186), 77 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2022-11-23 14:49:57,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:49:57,137 INFO L225 Difference]: With dead ends: 133 [2022-11-23 14:49:57,137 INFO L226 Difference]: Without dead ends: 131 [2022-11-23 14:49:57,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2538 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=644, Invalid=12696, Unknown=0, NotChecked=0, Total=13340 [2022-11-23 14:49:57,139 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 71 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 2869 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 2886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:49:57,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 635 Invalid, 2886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2869 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-23 14:49:57,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-11-23 14:49:57,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 90. [2022-11-23 14:49:57,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.1123595505617978) internal successors, (99), 89 states have internal predecessors, (99), 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 14:49:57,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2022-11-23 14:49:57,190 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 73 [2022-11-23 14:49:57,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:49:57,190 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2022-11-23 14:49:57,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.3846153846153846) internal successors, (186), 77 states have internal predecessors, (186), 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 14:49:57,190 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2022-11-23 14:49:57,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-23 14:49:57,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:49:57,191 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 13, 13, 1, 1, 1, 1, 1] [2022-11-23 14:49:57,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-11-23 14:49:57,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:49:57,391 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:49:57,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:49:57,392 INFO L85 PathProgramCache]: Analyzing trace with hash -688531918, now seen corresponding path program 30 times [2022-11-23 14:49:57,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:49:57,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675179125] [2022-11-23 14:49:57,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:49:57,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:49:57,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:49:58,102 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 223 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:49:58,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:49:58,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675179125] [2022-11-23 14:49:58,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675179125] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:49:58,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948515899] [2022-11-23 14:49:58,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:49:58,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:49:58,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:49:58,104 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:49:58,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-11-23 14:49:58,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:49:58,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:49:58,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 30 conjunts are in the unsatisfiable core [2022-11-23 14:49:58,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:49:59,194 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 260 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:49:59,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:49:59,809 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 260 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:49:59,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948515899] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:49:59,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1378834997] [2022-11-23 14:49:59,811 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:49:59,811 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:49:59,811 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:49:59,812 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:49:59,812 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:49:59,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:49:59,872 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 14:49:59,872 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-23 14:49:59,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:49:59,928 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:49:59,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:49:59,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:49:59,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 14:50:00,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:50:00,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:50:00,036 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-23 14:50:00,036 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 251 treesize of output 247 [2022-11-23 14:50:00,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:50:00,231 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:50:00,240 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:50:01,629 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18424#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:50:01,629 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:50:01,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:50:01,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 46 [2022-11-23 14:50:01,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7792821] [2022-11-23 14:50:01,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:50:01,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-23 14:50:01,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:50:01,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-23 14:50:01,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=536, Invalid=2326, Unknown=0, NotChecked=0, Total=2862 [2022-11-23 14:50:01,631 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 47 states, 47 states have (on average 2.595744680851064) internal successors, (122), 46 states have internal predecessors, (122), 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 14:50:02,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:50:02,016 INFO L93 Difference]: Finished difference Result 136 states and 145 transitions. [2022-11-23 14:50:02,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-23 14:50:02,017 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.595744680851064) internal successors, (122), 46 states have internal predecessors, (122), 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 74 [2022-11-23 14:50:02,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:50:02,018 INFO L225 Difference]: With dead ends: 136 [2022-11-23 14:50:02,018 INFO L226 Difference]: Without dead ends: 90 [2022-11-23 14:50:02,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 170 SyntacticMatches, 28 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1720 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=536, Invalid=2326, Unknown=0, NotChecked=0, Total=2862 [2022-11-23 14:50:02,019 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 5 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:50:02,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 126 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:50:02,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-11-23 14:50:02,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-11-23 14:50:02,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.101123595505618) internal successors, (98), 89 states have internal predecessors, (98), 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 14:50:02,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 98 transitions. [2022-11-23 14:50:02,090 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 98 transitions. Word has length 74 [2022-11-23 14:50:02,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:50:02,090 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 98 transitions. [2022-11-23 14:50:02,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.595744680851064) internal successors, (122), 46 states have internal predecessors, (122), 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 14:50:02,090 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 98 transitions. [2022-11-23 14:50:02,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-23 14:50:02,091 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:50:02,091 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 14, 13, 13, 1, 1, 1, 1, 1] [2022-11-23 14:50:02,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-11-23 14:50:02,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-23 14:50:02,300 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:50:02,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:50:02,300 INFO L85 PathProgramCache]: Analyzing trace with hash -968482453, now seen corresponding path program 31 times [2022-11-23 14:50:02,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:50:02,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615996866] [2022-11-23 14:50:02,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:02,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:50:02,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:04,312 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:50:04,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:50:04,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615996866] [2022-11-23 14:50:04,312 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615996866] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:50:04,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168316861] [2022-11-23 14:50:04,313 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:50:04,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:50:04,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:50:04,314 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:50:04,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-11-23 14:50:04,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:04,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-23 14:50:04,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:50:05,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:50:07,410 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:50:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:50:07,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:50:08,927 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-23 14:50:08,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-23 14:50:10,600 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:50:10,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168316861] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:50:10,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1930158766] [2022-11-23 14:50:10,602 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:50:10,602 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:50:10,602 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:50:10,602 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:50:10,603 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:50:10,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:50:10,668 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 14:50:10,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-23 14:50:10,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:50:10,723 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:50:10,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:50:10,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:50:10,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:50:10,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:50:10,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:50:10,866 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:50:10,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 250 [2022-11-23 14:50:10,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:50:11,077 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:50:11,084 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:50:13,192 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19290#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:50:13,193 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:50:13,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:50:13,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 93 [2022-11-23 14:50:13,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139009918] [2022-11-23 14:50:13,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:50:13,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-11-23 14:50:13,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:50:13,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-11-23 14:50:13,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=9755, Unknown=0, NotChecked=0, Total=10100 [2022-11-23 14:50:13,195 INFO L87 Difference]: Start difference. First operand 90 states and 98 transitions. Second operand has 94 states, 94 states have (on average 2.393617021276596) internal successors, (225), 93 states have internal predecessors, (225), 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 14:50:17,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:50:17,333 INFO L93 Difference]: Finished difference Result 141 states and 149 transitions. [2022-11-23 14:50:17,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-23 14:50:17,333 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.393617021276596) internal successors, (225), 93 states have internal predecessors, (225), 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 76 [2022-11-23 14:50:17,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:50:17,335 INFO L225 Difference]: With dead ends: 141 [2022-11-23 14:50:17,336 INFO L226 Difference]: Without dead ends: 139 [2022-11-23 14:50:17,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3006 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=517, Invalid=13525, Unknown=0, NotChecked=0, Total=14042 [2022-11-23 14:50:17,337 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 155 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 3428 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 1024 SdHoareTripleChecker+Invalid, 3430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:50:17,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 1024 Invalid, 3430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3428 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-23 14:50:17,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-11-23 14:50:17,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 94. [2022-11-23 14:50:17,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.096774193548387) internal successors, (102), 93 states have internal predecessors, (102), 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 14:50:17,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2022-11-23 14:50:17,401 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 76 [2022-11-23 14:50:17,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:50:17,402 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2022-11-23 14:50:17,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.393617021276596) internal successors, (225), 93 states have internal predecessors, (225), 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 14:50:17,402 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2022-11-23 14:50:17,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-23 14:50:17,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:50:17,403 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 14, 13, 13, 1, 1, 1, 1, 1] [2022-11-23 14:50:17,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-11-23 14:50:17,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-23 14:50:17,610 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:50:17,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:50:17,610 INFO L85 PathProgramCache]: Analyzing trace with hash 581993060, now seen corresponding path program 32 times [2022-11-23 14:50:17,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:50:17,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426699375] [2022-11-23 14:50:17,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:17,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:50:17,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:19,523 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:50:19,523 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:50:19,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426699375] [2022-11-23 14:50:19,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426699375] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:50:19,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182943253] [2022-11-23 14:50:19,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:50:19,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:50:19,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:50:19,526 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:50:19,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-11-23 14:50:20,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-11-23 14:50:20,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:50:20,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 91 conjunts are in the unsatisfiable core [2022-11-23 14:50:20,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:50:20,526 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:50:20,664 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-23 14:50:20,665 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 27 treesize of output 26 [2022-11-23 14:50:21,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-23 14:50:22,011 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:50:22,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:50:23,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-11-23 14:50:23,494 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 138 [2022-11-23 14:50:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:50:25,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182943253] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:50:25,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2123915275] [2022-11-23 14:50:25,196 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:50:25,196 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:50:25,196 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:50:25,196 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:50:25,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:50:25,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:50:25,238 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 14:50:25,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-23 14:50:25,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:50:25,279 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:50:25,279 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:50:25,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:50:25,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:50:25,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:50:25,347 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:50:25,374 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:50:25,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 244 treesize of output 246 [2022-11-23 14:50:25,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:50:25,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:50:25,600 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:50:27,357 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20204#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:50:27,357 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:50:27,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:50:27,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 34] total 82 [2022-11-23 14:50:27,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202863623] [2022-11-23 14:50:27,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:50:27,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-23 14:50:27,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:50:27,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-23 14:50:27,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=7716, Unknown=0, NotChecked=0, Total=8010 [2022-11-23 14:50:27,359 INFO L87 Difference]: Start difference. First operand 94 states and 102 transitions. Second operand has 83 states, 83 states have (on average 2.397590361445783) internal successors, (199), 82 states have internal predecessors, (199), 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 14:50:33,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:50:33,126 INFO L93 Difference]: Finished difference Result 139 states and 147 transitions. [2022-11-23 14:50:33,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-11-23 14:50:33,126 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.397590361445783) internal successors, (199), 82 states have internal predecessors, (199), 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 78 [2022-11-23 14:50:33,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:50:33,127 INFO L225 Difference]: With dead ends: 139 [2022-11-23 14:50:33,127 INFO L226 Difference]: Without dead ends: 137 [2022-11-23 14:50:33,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2841 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=683, Invalid=14323, Unknown=0, NotChecked=0, Total=15006 [2022-11-23 14:50:33,129 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 124 mSDsluCounter, 744 mSDsCounter, 0 mSdLazyCounter, 3428 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 3448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 3428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:50:33,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 760 Invalid, 3448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 3428 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-11-23 14:50:33,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-23 14:50:33,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 93. [2022-11-23 14:50:33,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0978260869565217) internal successors, (101), 92 states have internal predecessors, (101), 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 14:50:33,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 101 transitions. [2022-11-23 14:50:33,205 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 101 transitions. Word has length 78 [2022-11-23 14:50:33,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:50:33,205 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 101 transitions. [2022-11-23 14:50:33,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.397590361445783) internal successors, (199), 82 states have internal predecessors, (199), 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 14:50:33,205 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 101 transitions. [2022-11-23 14:50:33,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-11-23 14:50:33,206 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:50:33,206 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 14, 14, 1, 1, 1, 1, 1] [2022-11-23 14:50:33,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-11-23 14:50:33,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-23 14:50:33,406 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:50:33,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:50:33,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1534660361, now seen corresponding path program 33 times [2022-11-23 14:50:33,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:50:33,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112781979] [2022-11-23 14:50:33,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:33,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:50:33,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:34,132 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 261 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:50:34,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:50:34,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112781979] [2022-11-23 14:50:34,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112781979] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:50:34,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335082553] [2022-11-23 14:50:34,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:50:34,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:50:34,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:50:34,134 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:50:34,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-11-23 14:50:34,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:50:34,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:50:34,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-23 14:50:34,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:50:35,386 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 301 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:50:35,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:50:35,998 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 301 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:50:35,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335082553] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:50:35,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2130868259] [2022-11-23 14:50:36,000 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:50:36,000 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:50:36,000 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:50:36,000 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:50:36,000 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:50:36,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:50:36,050 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:50:36,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:50:36,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:50:36,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:50:36,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:50:36,083 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:50:36,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:50:36,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:50:36,181 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:50:36,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 250 [2022-11-23 14:50:36,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:50:36,375 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:50:36,383 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:50:37,580 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21118#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:50:37,580 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:50:37,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:50:37,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 49 [2022-11-23 14:50:37,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937048685] [2022-11-23 14:50:37,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:50:37,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-11-23 14:50:37,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:50:37,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-11-23 14:50:37,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=602, Invalid=2590, Unknown=0, NotChecked=0, Total=3192 [2022-11-23 14:50:37,582 INFO L87 Difference]: Start difference. First operand 93 states and 101 transitions. Second operand has 50 states, 50 states have (on average 2.6) internal successors, (130), 49 states have internal predecessors, (130), 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 14:50:38,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:50:38,099 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2022-11-23 14:50:38,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-23 14:50:38,100 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.6) internal successors, (130), 49 states have internal predecessors, (130), 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 79 [2022-11-23 14:50:38,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:50:38,101 INFO L225 Difference]: With dead ends: 142 [2022-11-23 14:50:38,101 INFO L226 Difference]: Without dead ends: 93 [2022-11-23 14:50:38,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 182 SyntacticMatches, 30 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1932 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=602, Invalid=2590, Unknown=0, NotChecked=0, Total=3192 [2022-11-23 14:50:38,102 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:50:38,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 234 Invalid, 440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:50:38,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-11-23 14:50:38,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-11-23 14:50:38,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0869565217391304) internal successors, (100), 92 states have internal predecessors, (100), 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 14:50:38,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2022-11-23 14:50:38,208 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 79 [2022-11-23 14:50:38,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:50:38,208 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2022-11-23 14:50:38,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.6) internal successors, (130), 49 states have internal predecessors, (130), 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 14:50:38,209 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2022-11-23 14:50:38,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-11-23 14:50:38,209 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:50:38,210 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 15, 14, 14, 1, 1, 1, 1, 1] [2022-11-23 14:50:38,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-11-23 14:50:38,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-23 14:50:38,419 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:50:38,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:50:38,419 INFO L85 PathProgramCache]: Analyzing trace with hash -622600336, now seen corresponding path program 34 times [2022-11-23 14:50:38,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:50:38,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609028551] [2022-11-23 14:50:38,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:38,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:50:38,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 0 proven. 573 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:50:40,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:50:40,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609028551] [2022-11-23 14:50:40,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609028551] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:50:40,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097994541] [2022-11-23 14:50:40,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:50:40,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:50:40,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:50:40,587 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:50:40,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-11-23 14:50:40,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:40,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 90 conjunts are in the unsatisfiable core [2022-11-23 14:50:40,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:50:42,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:50:43,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:50:43,920 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 0 proven. 573 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:50:43,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:50:45,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-23 14:50:45,495 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-23 14:50:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 0 proven. 573 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:50:47,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097994541] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:50:47,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1764250429] [2022-11-23 14:50:47,454 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:50:47,454 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:50:47,454 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:50:47,455 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:50:47,455 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:50:47,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:50:47,507 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 14:50:47,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-23 14:50:47,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:50:47,567 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:50:47,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:50:47,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:50:47,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:50:47,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:50:47,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:50:47,709 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:50:47,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 244 treesize of output 246 [2022-11-23 14:50:47,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:50:47,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:50:47,970 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:50:50,101 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22032#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:50:50,101 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:50:50,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:50:50,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 99 [2022-11-23 14:50:50,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377039246] [2022-11-23 14:50:50,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:50:50,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-11-23 14:50:50,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:50:50,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-11-23 14:50:50,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=10979, Unknown=0, NotChecked=0, Total=11342 [2022-11-23 14:50:50,104 INFO L87 Difference]: Start difference. First operand 93 states and 100 transitions. Second operand has 100 states, 100 states have (on average 2.4) internal successors, (240), 99 states have internal predecessors, (240), 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 14:50:54,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:50:54,401 INFO L93 Difference]: Finished difference Result 147 states and 154 transitions. [2022-11-23 14:50:54,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-11-23 14:50:54,401 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.4) internal successors, (240), 99 states have internal predecessors, (240), 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 81 [2022-11-23 14:50:54,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:50:54,403 INFO L225 Difference]: With dead ends: 147 [2022-11-23 14:50:54,403 INFO L226 Difference]: Without dead ends: 145 [2022-11-23 14:50:54,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3373 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=545, Invalid=15205, Unknown=0, NotChecked=0, Total=15750 [2022-11-23 14:50:54,405 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 110 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 3803 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 3805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-23 14:50:54,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1111 Invalid, 3805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3803 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-23 14:50:54,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-23 14:50:54,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 97. [2022-11-23 14:50:54,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0833333333333333) internal successors, (104), 96 states have internal predecessors, (104), 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 14:50:54,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 104 transitions. [2022-11-23 14:50:54,480 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 104 transitions. Word has length 81 [2022-11-23 14:50:54,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:50:54,480 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 104 transitions. [2022-11-23 14:50:54,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.4) internal successors, (240), 99 states have internal predecessors, (240), 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 14:50:54,480 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 104 transitions. [2022-11-23 14:50:54,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-11-23 14:50:54,481 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:50:54,481 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 15, 14, 14, 1, 1, 1, 1, 1] [2022-11-23 14:50:54,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-11-23 14:50:54,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:50:54,688 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:50:54,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:50:54,689 INFO L85 PathProgramCache]: Analyzing trace with hash 719073815, now seen corresponding path program 35 times [2022-11-23 14:50:54,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:50:54,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076766530] [2022-11-23 14:50:54,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:50:54,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:50:54,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:50:56,573 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 0 proven. 607 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:50:56,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:50:56,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076766530] [2022-11-23 14:50:56,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076766530] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:50:56,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693701262] [2022-11-23 14:50:56,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:50:56,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:50:56,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:50:56,576 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:50:56,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-11-23 14:50:57,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-11-23 14:50:57,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:50:57,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 96 conjunts are in the unsatisfiable core [2022-11-23 14:50:57,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:50:57,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:50:58,064 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-23 14:50:58,064 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 27 treesize of output 26 [2022-11-23 14:50:59,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-23 14:50:59,392 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 0 proven. 607 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:50:59,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:51:00,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-11-23 14:51:00,975 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 138 [2022-11-23 14:51:02,716 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 0 proven. 607 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:51:02,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693701262] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:51:02,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1818596206] [2022-11-23 14:51:02,718 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:51:02,718 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:51:02,718 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:51:02,719 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:51:02,719 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:51:02,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:51:02,774 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:51:02,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:51:02,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:51:02,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:51:02,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:51:02,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:51:02,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:51:02,865 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:51:02,897 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:51:02,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 250 [2022-11-23 14:51:02,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:51:03,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:51:03,124 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:51:05,043 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22995#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:51:05,043 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:51:05,043 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:51:05,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36, 36] total 87 [2022-11-23 14:51:05,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768858249] [2022-11-23 14:51:05,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:51:05,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-11-23 14:51:05,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:51:05,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-11-23 14:51:05,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=8623, Unknown=0, NotChecked=0, Total=8930 [2022-11-23 14:51:05,045 INFO L87 Difference]: Start difference. First operand 97 states and 104 transitions. Second operand has 88 states, 88 states have (on average 2.409090909090909) internal successors, (212), 87 states have internal predecessors, (212), 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 14:51:11,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:51:11,622 INFO L93 Difference]: Finished difference Result 145 states and 152 transitions. [2022-11-23 14:51:11,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-23 14:51:11,622 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.409090909090909) internal successors, (212), 87 states have internal predecessors, (212), 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 83 [2022-11-23 14:51:11,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:51:11,622 INFO L225 Difference]: With dead ends: 145 [2022-11-23 14:51:11,622 INFO L226 Difference]: Without dead ends: 143 [2022-11-23 14:51:11,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 187 SyntacticMatches, 2 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3161 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=719, Invalid=16051, Unknown=0, NotChecked=0, Total=16770 [2022-11-23 14:51:11,623 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 131 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 3563 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 794 SdHoareTripleChecker+Invalid, 3583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 3563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:51:11,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 794 Invalid, 3583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 3563 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-23 14:51:11,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-11-23 14:51:11,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 96. [2022-11-23 14:51:11,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 95 states have internal predecessors, (103), 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 14:51:11,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2022-11-23 14:51:11,697 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 83 [2022-11-23 14:51:11,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:51:11,698 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2022-11-23 14:51:11,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.409090909090909) internal successors, (212), 87 states have internal predecessors, (212), 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 14:51:11,698 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2022-11-23 14:51:11,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-11-23 14:51:11,699 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:51:11,699 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 15, 15, 1, 1, 1, 1, 1] [2022-11-23 14:51:11,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-11-23 14:51:11,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:51:11,901 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:51:11,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:51:11,901 INFO L85 PathProgramCache]: Analyzing trace with hash 2082264804, now seen corresponding path program 36 times [2022-11-23 14:51:11,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:51:11,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888830751] [2022-11-23 14:51:11,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:51:11,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:51:11,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:51:12,818 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 302 proven. 315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:51:12,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:51:12,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888830751] [2022-11-23 14:51:12,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888830751] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:51:12,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173446285] [2022-11-23 14:51:12,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:51:12,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:51:12,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:51:12,820 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:51:12,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-11-23 14:51:13,354 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:51:13,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:51:13,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-23 14:51:13,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:51:14,267 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 345 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:51:14,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:51:14,963 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 345 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:51:14,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173446285] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:51:14,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [598373085] [2022-11-23 14:51:14,964 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:51:14,964 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:51:14,965 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:51:14,965 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:51:14,965 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:51:14,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:51:15,004 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 14:51:15,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-23 14:51:15,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:51:15,049 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:51:15,049 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:51:15,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:51:15,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:51:15,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:51:15,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:51:15,153 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:51:15,153 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 250 [2022-11-23 14:51:15,215 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:51:15,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:51:15,338 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:51:16,484 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23958#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:51:16,484 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:51:16,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:51:16,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 52 [2022-11-23 14:51:16,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899939170] [2022-11-23 14:51:16,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:51:16,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-11-23 14:51:16,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:51:16,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-11-23 14:51:16,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=2868, Unknown=0, NotChecked=0, Total=3540 [2022-11-23 14:51:16,487 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand has 53 states, 53 states have (on average 2.6037735849056602) internal successors, (138), 52 states have internal predecessors, (138), 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 14:51:17,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:51:17,000 INFO L93 Difference]: Finished difference Result 148 states and 155 transitions. [2022-11-23 14:51:17,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-23 14:51:17,000 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.6037735849056602) internal successors, (138), 52 states have internal predecessors, (138), 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 84 [2022-11-23 14:51:17,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:51:17,001 INFO L225 Difference]: With dead ends: 148 [2022-11-23 14:51:17,001 INFO L226 Difference]: Without dead ends: 96 [2022-11-23 14:51:17,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 194 SyntacticMatches, 32 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2156 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=672, Invalid=2868, Unknown=0, NotChecked=0, Total=3540 [2022-11-23 14:51:17,002 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 5 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:51:17,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 220 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:51:17,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-23 14:51:17,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-11-23 14:51:17,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0736842105263158) internal successors, (102), 95 states have internal predecessors, (102), 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 14:51:17,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2022-11-23 14:51:17,096 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 84 [2022-11-23 14:51:17,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:51:17,096 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2022-11-23 14:51:17,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.6037735849056602) internal successors, (138), 52 states have internal predecessors, (138), 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 14:51:17,097 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2022-11-23 14:51:17,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-11-23 14:51:17,098 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:51:17,098 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 16, 15, 15, 1, 1, 1, 1, 1] [2022-11-23 14:51:17,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-11-23 14:51:17,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:51:17,307 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:51:17,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:51:17,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1363726627, now seen corresponding path program 37 times [2022-11-23 14:51:17,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:51:17,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049747884] [2022-11-23 14:51:17,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:51:17,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:51:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:51:19,307 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:51:19,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:51:19,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049747884] [2022-11-23 14:51:19,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049747884] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:51:19,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650173013] [2022-11-23 14:51:19,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:51:19,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:51:19,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:51:19,309 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:51:19,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-11-23 14:51:19,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:51:19,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 95 conjunts are in the unsatisfiable core [2022-11-23 14:51:19,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:51:20,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:51:22,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:51:22,804 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:51:22,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:51:24,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-23 14:51:24,503 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-23 14:51:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:51:26,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650173013] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:51:26,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1191777301] [2022-11-23 14:51:26,588 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:51:26,588 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:51:26,588 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:51:26,588 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:51:26,589 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:51:26,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:51:26,633 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:51:26,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:51:26,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:51:26,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:51:26,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:51:26,664 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:51:26,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:51:26,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:51:26,740 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:51:26,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 250 [2022-11-23 14:51:26,832 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:51:26,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:51:26,958 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:51:29,123 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24920#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:51:29,124 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:51:29,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:51:29,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 105 [2022-11-23 14:51:29,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351448543] [2022-11-23 14:51:29,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:51:29,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-11-23 14:51:29,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:51:29,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-11-23 14:51:29,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=12272, Unknown=0, NotChecked=0, Total=12656 [2022-11-23 14:51:29,126 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand has 106 states, 106 states have (on average 2.4056603773584904) internal successors, (255), 105 states have internal predecessors, (255), 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 14:51:34,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:51:34,133 INFO L93 Difference]: Finished difference Result 153 states and 159 transitions. [2022-11-23 14:51:34,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-23 14:51:34,133 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.4056603773584904) internal successors, (255), 105 states have internal predecessors, (255), 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 86 [2022-11-23 14:51:34,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:51:34,134 INFO L225 Difference]: With dead ends: 153 [2022-11-23 14:51:34,134 INFO L226 Difference]: Without dead ends: 151 [2022-11-23 14:51:34,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3761 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=576, Invalid=16980, Unknown=0, NotChecked=0, Total=17556 [2022-11-23 14:51:34,135 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 59 mSDsluCounter, 1280 mSDsCounter, 0 mSdLazyCounter, 4600 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 1302 SdHoareTripleChecker+Invalid, 4602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:51:34,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 1302 Invalid, 4602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4600 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-11-23 14:51:34,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-23 14:51:34,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 100. [2022-11-23 14:51:34,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0707070707070707) internal successors, (106), 99 states have internal predecessors, (106), 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 14:51:34,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2022-11-23 14:51:34,228 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 86 [2022-11-23 14:51:34,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:51:34,228 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2022-11-23 14:51:34,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.4056603773584904) internal successors, (255), 105 states have internal predecessors, (255), 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 14:51:34,229 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2022-11-23 14:51:34,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-23 14:51:34,229 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:51:34,229 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 16, 15, 15, 1, 1, 1, 1, 1] [2022-11-23 14:51:34,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-11-23 14:51:34,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:51:34,430 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:51:34,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:51:34,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1541706602, now seen corresponding path program 38 times [2022-11-23 14:51:34,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:51:34,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436294050] [2022-11-23 14:51:34,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:51:34,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:51:34,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:51:36,287 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 0 proven. 687 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:51:36,287 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:51:36,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436294050] [2022-11-23 14:51:36,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436294050] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:51:36,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886817199] [2022-11-23 14:51:36,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:51:36,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:51:36,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:51:36,288 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:51:36,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-11-23 14:51:37,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-11-23 14:51:37,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:51:37,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 101 conjunts are in the unsatisfiable core [2022-11-23 14:51:37,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:51:37,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:51:37,761 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-23 14:51:37,762 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 27 treesize of output 26 [2022-11-23 14:51:39,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-23 14:51:39,249 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 0 proven. 687 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:51:39,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:51:41,057 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-11-23 14:51:41,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-11-23 14:51:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 687 backedges. 0 proven. 687 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:51:43,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886817199] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:51:43,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [909746007] [2022-11-23 14:51:43,025 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:51:43,025 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:51:43,025 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:51:43,025 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:51:43,025 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:51:43,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:51:43,083 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:51:43,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:51:43,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:51:43,095 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:51:43,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:51:43,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 37 [2022-11-23 14:51:43,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:51:43,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:51:43,189 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-23 14:51:43,190 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 257 treesize of output 253 [2022-11-23 14:51:43,241 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:51:43,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:51:43,361 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:51:45,405 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25932#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:51:45,405 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:51:45,405 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:51:45,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 38, 38] total 92 [2022-11-23 14:51:45,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268183815] [2022-11-23 14:51:45,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:51:45,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-11-23 14:51:45,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:51:45,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-11-23 14:51:45,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=9574, Unknown=0, NotChecked=0, Total=9900 [2022-11-23 14:51:45,407 INFO L87 Difference]: Start difference. First operand 100 states and 106 transitions. Second operand has 93 states, 93 states have (on average 2.4193548387096775) internal successors, (225), 92 states have internal predecessors, (225), 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 14:51:52,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:51:52,604 INFO L93 Difference]: Finished difference Result 151 states and 157 transitions. [2022-11-23 14:51:52,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-11-23 14:51:52,605 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.4193548387096775) internal successors, (225), 92 states have internal predecessors, (225), 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 88 [2022-11-23 14:51:52,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:51:52,605 INFO L225 Difference]: With dead ends: 151 [2022-11-23 14:51:52,605 INFO L226 Difference]: Without dead ends: 149 [2022-11-23 14:51:52,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 199 SyntacticMatches, 2 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3498 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=761, Invalid=17871, Unknown=0, NotChecked=0, Total=18632 [2022-11-23 14:51:52,606 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 255 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 4224 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 4247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 4224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:51:52,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 1010 Invalid, 4247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 4224 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-23 14:51:52,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-11-23 14:51:52,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 99. [2022-11-23 14:51:52,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0714285714285714) internal successors, (105), 98 states have internal predecessors, (105), 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 14:51:52,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 105 transitions. [2022-11-23 14:51:52,685 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 105 transitions. Word has length 88 [2022-11-23 14:51:52,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:51:52,685 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 105 transitions. [2022-11-23 14:51:52,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.4193548387096775) internal successors, (225), 92 states have internal predecessors, (225), 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 14:51:52,686 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 105 transitions. [2022-11-23 14:51:52,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-11-23 14:51:52,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:51:52,686 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 16, 16, 1, 1, 1, 1, 1] [2022-11-23 14:51:52,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-11-23 14:51:52,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-23 14:51:52,895 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:51:52,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:51:52,895 INFO L85 PathProgramCache]: Analyzing trace with hash -679168937, now seen corresponding path program 39 times [2022-11-23 14:51:52,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:51:52,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125025241] [2022-11-23 14:51:52,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:51:52,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:51:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:51:53,725 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 346 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:51:53,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:51:53,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125025241] [2022-11-23 14:51:53,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125025241] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:51:53,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615062595] [2022-11-23 14:51:53,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:51:53,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:51:53,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:51:53,727 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:51:53,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-11-23 14:51:54,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:51:54,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:51:54,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-23 14:51:54,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:51:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 392 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:51:55,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:51:56,102 INFO L134 CoverageAnalysis]: Checked inductivity of 698 backedges. 392 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:51:56,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615062595] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:51:56,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [18678202] [2022-11-23 14:51:56,103 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:51:56,103 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:51:56,103 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:51:56,103 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:51:56,103 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:51:56,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:51:56,144 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:51:56,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:51:56,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:51:56,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:51:56,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:51:56,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-23 14:51:56,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:51:56,244 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:51:56,278 INFO L321 Elim1Store]: treesize reduction 74, result has 30.8 percent of original size [2022-11-23 14:51:56,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 263 treesize of output 269 [2022-11-23 14:51:56,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:51:56,482 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:51:56,489 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:51:57,705 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26944#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:51:57,705 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:51:57,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:51:57,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 55 [2022-11-23 14:51:57,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950124477] [2022-11-23 14:51:57,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:51:57,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-11-23 14:51:57,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:51:57,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-11-23 14:51:57,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=749, Invalid=3157, Unknown=0, NotChecked=0, Total=3906 [2022-11-23 14:51:57,707 INFO L87 Difference]: Start difference. First operand 99 states and 105 transitions. Second operand has 56 states, 56 states have (on average 2.607142857142857) internal successors, (146), 55 states have internal predecessors, (146), 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 14:51:58,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:51:58,197 INFO L93 Difference]: Finished difference Result 154 states and 160 transitions. [2022-11-23 14:51:58,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-23 14:51:58,197 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.607142857142857) internal successors, (146), 55 states have internal predecessors, (146), 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 89 [2022-11-23 14:51:58,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:51:58,198 INFO L225 Difference]: With dead ends: 154 [2022-11-23 14:51:58,198 INFO L226 Difference]: Without dead ends: 99 [2022-11-23 14:51:58,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 206 SyntacticMatches, 34 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2392 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=749, Invalid=3157, Unknown=0, NotChecked=0, Total=3906 [2022-11-23 14:51:58,199 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 5 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:51:58,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 176 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:51:58,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-11-23 14:51:58,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-11-23 14:51:58,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0612244897959184) internal successors, (104), 98 states have internal predecessors, (104), 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 14:51:58,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 104 transitions. [2022-11-23 14:51:58,290 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 104 transitions. Word has length 89 [2022-11-23 14:51:58,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:51:58,290 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 104 transitions. [2022-11-23 14:51:58,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.607142857142857) internal successors, (146), 55 states have internal predecessors, (146), 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 14:51:58,291 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 104 transitions. [2022-11-23 14:51:58,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-11-23 14:51:58,291 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:51:58,291 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 17, 16, 16, 1, 1, 1, 1, 1] [2022-11-23 14:51:58,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-11-23 14:51:58,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-11-23 14:51:58,492 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:51:58,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:51:58,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1404006398, now seen corresponding path program 40 times [2022-11-23 14:51:58,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:51:58,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709861919] [2022-11-23 14:51:58,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:51:58,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:51:58,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:52:00,405 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 0 proven. 734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:52:00,405 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:52:00,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709861919] [2022-11-23 14:52:00,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709861919] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:52:00,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737681772] [2022-11-23 14:52:00,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:52:00,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:52:00,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:52:00,407 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:52:00,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-11-23 14:52:00,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:52:00,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 100 conjunts are in the unsatisfiable core [2022-11-23 14:52:00,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:52:02,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:52:03,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:52:04,025 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 0 proven. 734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:52:04,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:52:05,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-23 14:52:05,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-23 14:52:07,702 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 0 proven. 734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:52:07,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737681772] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:52:07,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1707236152] [2022-11-23 14:52:07,703 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:52:07,703 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:52:07,703 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:52:07,703 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:52:07,703 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:52:07,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:07,767 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:52:07,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:52:07,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:07,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:52:07,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:07,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 37 [2022-11-23 14:52:07,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:07,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:07,900 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-23 14:52:07,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 257 treesize of output 253 [2022-11-23 14:52:07,946 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:52:08,044 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:52:08,050 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:52:10,103 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27954#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:52:10,103 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:52:10,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:52:10,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 111 [2022-11-23 14:52:10,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671600751] [2022-11-23 14:52:10,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:52:10,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-11-23 14:52:10,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:52:10,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-11-23 14:52:10,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=13637, Unknown=0, NotChecked=0, Total=14042 [2022-11-23 14:52:10,105 INFO L87 Difference]: Start difference. First operand 99 states and 104 transitions. Second operand has 112 states, 112 states have (on average 2.4107142857142856) internal successors, (270), 111 states have internal predecessors, (270), 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 14:52:14,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:52:14,401 INFO L93 Difference]: Finished difference Result 159 states and 164 transitions. [2022-11-23 14:52:14,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-11-23 14:52:14,401 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.4107142857142856) internal successors, (270), 111 states have internal predecessors, (270), 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 91 [2022-11-23 14:52:14,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:52:14,402 INFO L225 Difference]: With dead ends: 159 [2022-11-23 14:52:14,402 INFO L226 Difference]: Without dead ends: 157 [2022-11-23 14:52:14,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4170 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=607, Invalid=18853, Unknown=0, NotChecked=0, Total=19460 [2022-11-23 14:52:14,404 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 124 mSDsluCounter, 1259 mSDsCounter, 0 mSdLazyCounter, 4483 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 1282 SdHoareTripleChecker+Invalid, 4485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-11-23 14:52:14,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 1282 Invalid, 4485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4483 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-11-23 14:52:14,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-11-23 14:52:14,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 103. [2022-11-23 14:52:14,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0588235294117647) internal successors, (108), 102 states have internal predecessors, (108), 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 14:52:14,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 108 transitions. [2022-11-23 14:52:14,489 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 108 transitions. Word has length 91 [2022-11-23 14:52:14,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:52:14,489 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 108 transitions. [2022-11-23 14:52:14,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.4107142857142856) internal successors, (270), 111 states have internal predecessors, (270), 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 14:52:14,489 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 108 transitions. [2022-11-23 14:52:14,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-23 14:52:14,490 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:52:14,490 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 17, 16, 16, 1, 1, 1, 1, 1] [2022-11-23 14:52:14,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-11-23 14:52:14,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:52:14,697 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:52:14,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:52:14,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1880743397, now seen corresponding path program 41 times [2022-11-23 14:52:14,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:52:14,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778234852] [2022-11-23 14:52:14,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:52:14,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:52:14,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:52:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:52:16,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:52:16,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778234852] [2022-11-23 14:52:16,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778234852] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:52:16,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296490260] [2022-11-23 14:52:16,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:52:16,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:52:16,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:52:16,730 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:52:16,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-11-23 14:52:18,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2022-11-23 14:52:18,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:52:18,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 106 conjunts are in the unsatisfiable core [2022-11-23 14:52:18,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:52:18,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:52:18,517 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-23 14:52:18,518 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 27 treesize of output 26 [2022-11-23 14:52:19,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-23 14:52:19,993 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:52:19,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:52:21,704 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-11-23 14:52:21,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-11-23 14:52:23,599 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:52:23,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296490260] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:52:23,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1294252615] [2022-11-23 14:52:23,600 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:52:23,600 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:52:23,600 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:52:23,600 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:52:23,600 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:52:23,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:23,637 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 14:52:23,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-23 14:52:23,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:23,677 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:52:23,677 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:52:23,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:23,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:52:23,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:23,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:23,769 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:52:23,769 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 250 [2022-11-23 14:52:23,867 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:52:23,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:52:23,979 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:52:25,919 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '29015#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:52:25,919 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:52:25,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:52:25,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40, 40] total 97 [2022-11-23 14:52:25,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769767039] [2022-11-23 14:52:25,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:52:25,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-11-23 14:52:25,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:52:25,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-11-23 14:52:25,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=10581, Unknown=0, NotChecked=0, Total=10920 [2022-11-23 14:52:25,921 INFO L87 Difference]: Start difference. First operand 103 states and 108 transitions. Second operand has 98 states, 98 states have (on average 2.4285714285714284) internal successors, (238), 97 states have internal predecessors, (238), 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 14:52:33,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:52:33,043 INFO L93 Difference]: Finished difference Result 157 states and 162 transitions. [2022-11-23 14:52:33,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-23 14:52:33,043 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.4285714285714284) internal successors, (238), 97 states have internal predecessors, (238), 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 93 [2022-11-23 14:52:33,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:52:33,044 INFO L225 Difference]: With dead ends: 157 [2022-11-23 14:52:33,044 INFO L226 Difference]: Without dead ends: 155 [2022-11-23 14:52:33,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3852 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=797, Invalid=19795, Unknown=0, NotChecked=0, Total=20592 [2022-11-23 14:52:33,046 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 205 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 4488 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 4511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 4488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-11-23 14:52:33,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1090 Invalid, 4511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 4488 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-11-23 14:52:33,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-11-23 14:52:33,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 102. [2022-11-23 14:52:33,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0594059405940595) internal successors, (107), 101 states have internal predecessors, (107), 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 14:52:33,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2022-11-23 14:52:33,141 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 93 [2022-11-23 14:52:33,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:52:33,142 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2022-11-23 14:52:33,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.4285714285714284) internal successors, (238), 97 states have internal predecessors, (238), 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 14:52:33,142 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2022-11-23 14:52:33,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-11-23 14:52:33,142 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:52:33,143 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 17, 17, 1, 1, 1, 1, 1] [2022-11-23 14:52:33,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-11-23 14:52:33,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-23 14:52:33,343 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:52:33,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:52:33,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1926769770, now seen corresponding path program 42 times [2022-11-23 14:52:33,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:52:33,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878622104] [2022-11-23 14:52:33,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:52:33,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:52:33,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:52:34,237 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 393 proven. 391 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:52:34,237 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:52:34,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878622104] [2022-11-23 14:52:34,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878622104] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:52:34,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712793244] [2022-11-23 14:52:34,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:52:34,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:52:34,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:52:34,239 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:52:34,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-11-23 14:52:34,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:52:34,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:52:34,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 38 conjunts are in the unsatisfiable core [2022-11-23 14:52:34,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:52:35,900 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 442 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:52:35,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:52:36,672 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 442 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:52:36,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712793244] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:52:36,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [726953885] [2022-11-23 14:52:36,673 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:52:36,673 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:52:36,673 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:52:36,673 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:52:36,674 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:52:36,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:36,721 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:52:36,721 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:52:36,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:36,733 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:52:36,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:36,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:52:36,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:36,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:36,829 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:52:36,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 244 treesize of output 246 [2022-11-23 14:52:36,914 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:52:37,008 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:52:37,015 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:52:38,165 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30076#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:52:38,165 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:52:38,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:52:38,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 58 [2022-11-23 14:52:38,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855792905] [2022-11-23 14:52:38,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:52:38,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-11-23 14:52:38,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:52:38,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-11-23 14:52:38,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=824, Invalid=3466, Unknown=0, NotChecked=0, Total=4290 [2022-11-23 14:52:38,167 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand has 59 states, 59 states have (on average 2.610169491525424) internal successors, (154), 58 states have internal predecessors, (154), 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 14:52:38,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:52:38,800 INFO L93 Difference]: Finished difference Result 160 states and 165 transitions. [2022-11-23 14:52:38,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-23 14:52:38,800 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.610169491525424) internal successors, (154), 58 states have internal predecessors, (154), 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 94 [2022-11-23 14:52:38,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:52:38,801 INFO L225 Difference]: With dead ends: 160 [2022-11-23 14:52:38,801 INFO L226 Difference]: Without dead ends: 102 [2022-11-23 14:52:38,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 218 SyntacticMatches, 36 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2640 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=824, Invalid=3466, Unknown=0, NotChecked=0, Total=4290 [2022-11-23 14:52:38,802 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:52:38,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 211 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:52:38,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-11-23 14:52:38,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-11-23 14:52:38,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0495049504950495) internal successors, (106), 101 states have internal predecessors, (106), 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 14:52:38,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2022-11-23 14:52:38,952 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 94 [2022-11-23 14:52:38,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:52:38,952 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2022-11-23 14:52:38,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.610169491525424) internal successors, (154), 58 states have internal predecessors, (154), 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 14:52:38,953 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2022-11-23 14:52:38,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-23 14:52:38,954 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:52:38,954 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 18, 17, 17, 1, 1, 1, 1, 1] [2022-11-23 14:52:38,968 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-11-23 14:52:39,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-11-23 14:52:39,162 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:52:39,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:52:39,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1383286863, now seen corresponding path program 43 times [2022-11-23 14:52:39,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:52:39,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698232338] [2022-11-23 14:52:39,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:52:39,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:52:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:52:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 0 proven. 822 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:52:41,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:52:41,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698232338] [2022-11-23 14:52:41,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698232338] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:52:41,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360731048] [2022-11-23 14:52:41,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:52:41,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:52:41,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:52:41,180 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:52:41,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-11-23 14:52:41,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:52:41,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 105 conjunts are in the unsatisfiable core [2022-11-23 14:52:41,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:52:42,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:52:44,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:52:44,944 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 0 proven. 822 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:52:44,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:52:46,742 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-23 14:52:46,745 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-23 14:52:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 0 proven. 822 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:52:48,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360731048] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:52:48,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1591662622] [2022-11-23 14:52:48,864 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:52:48,864 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:52:48,864 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:52:48,864 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:52:48,864 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:52:48,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:48,902 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 14:52:48,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-23 14:52:48,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:48,941 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:52:48,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:52:48,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:48,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:52:49,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:52:49,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:52:49,040 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:52:49,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 234 treesize of output 236 [2022-11-23 14:52:49,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:52:49,201 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:52:50,963 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31134#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:52:50,964 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:52:50,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:52:50,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 117 [2022-11-23 14:52:50,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719953877] [2022-11-23 14:52:50,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:52:50,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-11-23 14:52:50,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:52:50,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-11-23 14:52:50,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=15072, Unknown=0, NotChecked=0, Total=15500 [2022-11-23 14:52:50,967 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand has 118 states, 118 states have (on average 2.4152542372881354) internal successors, (285), 117 states have internal predecessors, (285), 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 14:52:55,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:52:55,731 INFO L93 Difference]: Finished difference Result 165 states and 169 transitions. [2022-11-23 14:52:55,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-23 14:52:55,731 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.4152542372881354) internal successors, (285), 117 states have internal predecessors, (285), 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 96 [2022-11-23 14:52:55,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:52:55,732 INFO L225 Difference]: With dead ends: 165 [2022-11-23 14:52:55,732 INFO L226 Difference]: Without dead ends: 163 [2022-11-23 14:52:55,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4626 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=640, Invalid=20822, Unknown=0, NotChecked=0, Total=21462 [2022-11-23 14:52:55,734 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 130 mSDsluCounter, 1449 mSDsCounter, 0 mSdLazyCounter, 5091 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 1473 SdHoareTripleChecker+Invalid, 5093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:52:55,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 1473 Invalid, 5093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5091 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-23 14:52:55,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-11-23 14:52:55,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 106. [2022-11-23 14:52:55,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.0476190476190477) internal successors, (110), 105 states have internal predecessors, (110), 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 14:52:55,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 110 transitions. [2022-11-23 14:52:55,833 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 110 transitions. Word has length 96 [2022-11-23 14:52:55,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:52:55,833 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 110 transitions. [2022-11-23 14:52:55,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.4152542372881354) internal successors, (285), 117 states have internal predecessors, (285), 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 14:52:55,834 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 110 transitions. [2022-11-23 14:52:55,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-23 14:52:55,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:52:55,835 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 18, 17, 17, 1, 1, 1, 1, 1] [2022-11-23 14:52:55,840 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-11-23 14:52:56,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-23 14:52:56,039 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:52:56,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:52:56,039 INFO L85 PathProgramCache]: Analyzing trace with hash -223055160, now seen corresponding path program 44 times [2022-11-23 14:52:56,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:52:56,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863008978] [2022-11-23 14:52:56,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:52:56,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:52:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:52:58,094 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 0 proven. 862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:52:58,095 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:52:58,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863008978] [2022-11-23 14:52:58,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863008978] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:52:58,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745660888] [2022-11-23 14:52:58,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:52:58,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:52:58,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:52:58,096 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:52:58,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-11-23 14:52:59,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2022-11-23 14:52:59,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:52:59,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 111 conjunts are in the unsatisfiable core [2022-11-23 14:52:59,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:52:59,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:53:00,111 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-23 14:53:00,112 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 27 treesize of output 26 [2022-11-23 14:53:01,633 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-23 14:53:01,697 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 0 proven. 862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:53:01,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:53:03,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-11-23 14:53:03,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 146 treesize of output 138 [2022-11-23 14:53:05,577 INFO L134 CoverageAnalysis]: Checked inductivity of 862 backedges. 0 proven. 862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:53:05,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745660888] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:53:05,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1593250030] [2022-11-23 14:53:05,579 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:53:05,579 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:53:05,579 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:53:05,579 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:53:05,580 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:53:05,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:05,616 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 14:53:05,616 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-23 14:53:05,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:05,657 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:53:05,658 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:53:05,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:05,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:53:05,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:05,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:05,753 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:53:05,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 238 treesize of output 240 [2022-11-23 14:53:05,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:53:05,930 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:53:07,498 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '32244#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:53:07,499 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:53:07,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:53:07,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42, 42] total 102 [2022-11-23 14:53:07,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301603798] [2022-11-23 14:53:07,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:53:07,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-11-23 14:53:07,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:53:07,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-11-23 14:53:07,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=11633, Unknown=0, NotChecked=0, Total=11990 [2022-11-23 14:53:07,501 INFO L87 Difference]: Start difference. First operand 106 states and 110 transitions. Second operand has 103 states, 103 states have (on average 2.436893203883495) internal successors, (251), 102 states have internal predecessors, (251), 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 14:53:14,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:53:14,976 INFO L93 Difference]: Finished difference Result 163 states and 167 transitions. [2022-11-23 14:53:14,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-11-23 14:53:14,976 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.436893203883495) internal successors, (251), 102 states have internal predecessors, (251), 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 98 [2022-11-23 14:53:14,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:53:14,977 INFO L225 Difference]: With dead ends: 163 [2022-11-23 14:53:14,977 INFO L226 Difference]: Without dead ends: 161 [2022-11-23 14:53:14,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 223 SyntacticMatches, 2 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4268 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=838, Invalid=21812, Unknown=0, NotChecked=0, Total=22650 [2022-11-23 14:53:14,979 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 156 mSDsluCounter, 1053 mSDsCounter, 0 mSdLazyCounter, 4696 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 1073 SdHoareTripleChecker+Invalid, 4721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 4696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-11-23 14:53:14,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 1073 Invalid, 4721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 4696 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-11-23 14:53:14,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-23 14:53:15,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 105. [2022-11-23 14:53:15,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0480769230769231) internal successors, (109), 104 states have internal predecessors, (109), 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 14:53:15,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2022-11-23 14:53:15,121 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 98 [2022-11-23 14:53:15,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:53:15,121 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2022-11-23 14:53:15,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.436893203883495) internal successors, (251), 102 states have internal predecessors, (251), 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 14:53:15,122 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2022-11-23 14:53:15,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-11-23 14:53:15,122 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:53:15,122 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 18, 18, 1, 1, 1, 1, 1] [2022-11-23 14:53:15,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-11-23 14:53:15,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2022-11-23 14:53:15,327 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:53:15,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:53:15,327 INFO L85 PathProgramCache]: Analyzing trace with hash -707146331, now seen corresponding path program 45 times [2022-11-23 14:53:15,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:53:15,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256729440] [2022-11-23 14:53:15,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:53:15,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:53:15,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:53:16,325 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 443 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:53:16,325 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:53:16,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256729440] [2022-11-23 14:53:16,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256729440] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:53:16,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980695405] [2022-11-23 14:53:16,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:53:16,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:53:16,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:53:16,327 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:53:16,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-11-23 14:53:17,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:53:17,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:53:17,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 526 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-23 14:53:17,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:53:18,365 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 495 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:53:18,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:53:19,149 INFO L134 CoverageAnalysis]: Checked inductivity of 875 backedges. 495 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:53:19,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980695405] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:53:19,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [264773133] [2022-11-23 14:53:19,150 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:53:19,151 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:53:19,151 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:53:19,151 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:53:19,151 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:53:19,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:19,204 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:53:19,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:53:19,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:19,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:53:19,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:19,237 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 37 [2022-11-23 14:53:19,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:19,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:19,297 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-23 14:53:19,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 247 treesize of output 243 [2022-11-23 14:53:19,340 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:53:19,449 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:53:20,347 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33354#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:53:20,347 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:53:20,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:53:20,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 61 [2022-11-23 14:53:20,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220744360] [2022-11-23 14:53:20,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:53:20,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-11-23 14:53:20,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:53:20,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-11-23 14:53:20,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=908, Invalid=3784, Unknown=0, NotChecked=0, Total=4692 [2022-11-23 14:53:20,352 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 62 states, 62 states have (on average 2.6129032258064515) internal successors, (162), 61 states have internal predecessors, (162), 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 14:53:20,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:53:20,925 INFO L93 Difference]: Finished difference Result 166 states and 170 transitions. [2022-11-23 14:53:20,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-23 14:53:20,925 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.6129032258064515) internal successors, (162), 61 states have internal predecessors, (162), 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 99 [2022-11-23 14:53:20,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:53:20,951 INFO L225 Difference]: With dead ends: 166 [2022-11-23 14:53:20,951 INFO L226 Difference]: Without dead ends: 105 [2022-11-23 14:53:20,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 230 SyntacticMatches, 38 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2904 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=908, Invalid=3784, Unknown=0, NotChecked=0, Total=4692 [2022-11-23 14:53:20,954 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 7 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 14:53:20,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 193 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 14:53:20,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-23 14:53:21,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-11-23 14:53:21,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 104 states have internal predecessors, (108), 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 14:53:21,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2022-11-23 14:53:21,125 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 99 [2022-11-23 14:53:21,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:53:21,125 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2022-11-23 14:53:21,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.6129032258064515) internal successors, (162), 61 states have internal predecessors, (162), 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 14:53:21,125 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2022-11-23 14:53:21,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-23 14:53:21,126 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:53:21,126 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 19, 18, 18, 1, 1, 1, 1, 1] [2022-11-23 14:53:21,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-11-23 14:53:21,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:53:21,327 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:53:21,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:53:21,327 INFO L85 PathProgramCache]: Analyzing trace with hash -716741492, now seen corresponding path program 46 times [2022-11-23 14:53:21,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:53:21,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166174626] [2022-11-23 14:53:21,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:53:21,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:53:21,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:53:23,645 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 0 proven. 915 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:53:23,645 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:53:23,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166174626] [2022-11-23 14:53:23,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166174626] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:53:23,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593272367] [2022-11-23 14:53:23,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:53:23,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:53:23,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:53:23,647 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:53:23,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-11-23 14:53:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:53:23,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 110 conjunts are in the unsatisfiable core [2022-11-23 14:53:23,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:53:25,504 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:53:27,608 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:53:27,684 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 0 proven. 915 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:53:27,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:53:29,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-23 14:53:29,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-23 14:53:31,975 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 0 proven. 915 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:53:31,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593272367] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:53:31,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [787121405] [2022-11-23 14:53:31,977 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:53:31,977 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:53:31,977 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:53:31,977 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:53:31,978 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:53:31,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:32,038 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:53:32,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:53:32,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:32,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:53:32,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:32,073 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 37 [2022-11-23 14:53:32,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:32,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:32,149 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-23 14:53:32,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 247 treesize of output 243 [2022-11-23 14:53:32,206 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:53:32,300 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:53:34,161 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '34460#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:53:34,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:53:34,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:53:34,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 123 [2022-11-23 14:53:34,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178002889] [2022-11-23 14:53:34,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:53:34,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-11-23 14:53:34,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:53:34,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-11-23 14:53:34,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=16581, Unknown=0, NotChecked=0, Total=17030 [2022-11-23 14:53:34,163 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand has 124 states, 124 states have (on average 2.4193548387096775) internal successors, (300), 123 states have internal predecessors, (300), 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 14:53:39,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:53:39,547 INFO L93 Difference]: Finished difference Result 171 states and 174 transitions. [2022-11-23 14:53:39,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-23 14:53:39,547 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.4193548387096775) internal successors, (300), 123 states have internal predecessors, (300), 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 101 [2022-11-23 14:53:39,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:53:39,548 INFO L225 Difference]: With dead ends: 171 [2022-11-23 14:53:39,548 INFO L226 Difference]: Without dead ends: 169 [2022-11-23 14:53:39,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5078 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=671, Invalid=22891, Unknown=0, NotChecked=0, Total=23562 [2022-11-23 14:53:39,549 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 134 mSDsluCounter, 1618 mSDsCounter, 0 mSdLazyCounter, 5813 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1643 SdHoareTripleChecker+Invalid, 5815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:53:39,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 1643 Invalid, 5815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5813 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-11-23 14:53:39,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-11-23 14:53:39,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 109. [2022-11-23 14:53:39,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.037037037037037) internal successors, (112), 108 states have internal predecessors, (112), 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 14:53:39,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2022-11-23 14:53:39,659 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 101 [2022-11-23 14:53:39,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:53:39,659 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2022-11-23 14:53:39,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.4193548387096775) internal successors, (300), 123 states have internal predecessors, (300), 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 14:53:39,659 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2022-11-23 14:53:39,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-11-23 14:53:39,660 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:53:39,660 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 19, 18, 18, 1, 1, 1, 1, 1] [2022-11-23 14:53:39,667 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-11-23 14:53:39,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:53:39,860 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:53:39,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:53:39,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1347756621, now seen corresponding path program 47 times [2022-11-23 14:53:39,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:53:39,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287728024] [2022-11-23 14:53:39,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:53:39,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:53:39,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:53:42,462 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 0 proven. 957 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:53:42,463 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:53:42,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287728024] [2022-11-23 14:53:42,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287728024] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:53:42,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204159429] [2022-11-23 14:53:42,463 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:53:42,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:53:42,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:53:42,464 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:53:42,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-11-23 14:53:44,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-11-23 14:53:44,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:53:44,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 556 conjuncts, 116 conjunts are in the unsatisfiable core [2022-11-23 14:53:44,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:53:45,031 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:53:45,162 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-23 14:53:45,163 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 27 treesize of output 26 [2022-11-23 14:53:46,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-23 14:53:46,895 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 0 proven. 957 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:53:46,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:53:48,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-11-23 14:53:48,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-11-23 14:53:51,092 INFO L134 CoverageAnalysis]: Checked inductivity of 957 backedges. 0 proven. 957 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:53:51,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204159429] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:53:51,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1690275304] [2022-11-23 14:53:51,093 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:53:51,093 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:53:51,094 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:53:51,094 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:53:51,094 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:53:51,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:51,144 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 14:53:51,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-23 14:53:51,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:51,191 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:53:51,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:53:51,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:51,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:53:51,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:53:51,269 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:53:51,298 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:53:51,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 234 treesize of output 236 [2022-11-23 14:53:51,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:53:51,467 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:53:53,186 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35619#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:53:53,186 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:53:53,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:53:53,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44, 44] total 107 [2022-11-23 14:53:53,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438784186] [2022-11-23 14:53:53,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:53:53,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-11-23 14:53:53,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:53:53,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-11-23 14:53:53,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=12737, Unknown=0, NotChecked=0, Total=13110 [2022-11-23 14:53:53,189 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand has 108 states, 108 states have (on average 2.4444444444444446) internal successors, (264), 107 states have internal predecessors, (264), 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 14:54:01,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:54:01,699 INFO L93 Difference]: Finished difference Result 169 states and 172 transitions. [2022-11-23 14:54:01,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-23 14:54:01,699 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.4444444444444446) internal successors, (264), 107 states have internal predecessors, (264), 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 103 [2022-11-23 14:54:01,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:54:01,700 INFO L225 Difference]: With dead ends: 169 [2022-11-23 14:54:01,700 INFO L226 Difference]: Without dead ends: 167 [2022-11-23 14:54:01,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 235 SyntacticMatches, 2 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4658 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=877, Invalid=23929, Unknown=0, NotChecked=0, Total=24806 [2022-11-23 14:54:01,702 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 225 mSDsluCounter, 1272 mSDsCounter, 0 mSdLazyCounter, 5422 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 5446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 5422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-23 14:54:01,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [225 Valid, 1293 Invalid, 5446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 5422 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-23 14:54:01,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-23 14:54:01,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 108. [2022-11-23 14:54:01,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0373831775700935) internal successors, (111), 107 states have internal predecessors, (111), 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 14:54:01,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2022-11-23 14:54:01,824 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 103 [2022-11-23 14:54:01,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:54:01,824 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2022-11-23 14:54:01,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.4444444444444446) internal successors, (264), 107 states have internal predecessors, (264), 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 14:54:01,824 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2022-11-23 14:54:01,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-23 14:54:01,825 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:54:01,825 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 19, 19, 1, 1, 1, 1, 1] [2022-11-23 14:54:01,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-11-23 14:54:02,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:54:02,026 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:54:02,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:54:02,026 INFO L85 PathProgramCache]: Analyzing trace with hash 2136730696, now seen corresponding path program 48 times [2022-11-23 14:54:02,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:54:02,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607130968] [2022-11-23 14:54:02,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:54:02,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:54:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:54:03,217 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 496 proven. 475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:54:03,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:54:03,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607130968] [2022-11-23 14:54:03,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607130968] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:54:03,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210898100] [2022-11-23 14:54:03,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:54:03,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:54:03,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:54:03,218 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:54:03,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-11-23 14:54:04,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:54:04,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:54:04,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 42 conjunts are in the unsatisfiable core [2022-11-23 14:54:04,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:54:05,365 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 551 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:54:05,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:54:06,263 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 551 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:54:06,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210898100] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:54:06,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1324350771] [2022-11-23 14:54:06,265 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:54:06,265 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:54:06,265 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:54:06,265 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:54:06,265 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:54:06,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:54:06,305 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:54:06,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:54:06,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:54:06,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:54:06,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:54:06,336 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 14:54:06,380 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:54:06,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:54:06,398 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-23 14:54:06,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 241 treesize of output 237 [2022-11-23 14:54:06,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:54:06,580 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:54:07,472 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '36778#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:54:07,473 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:54:07,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:54:07,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 64 [2022-11-23 14:54:07,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938526543] [2022-11-23 14:54:07,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:54:07,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-23 14:54:07,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:54:07,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-23 14:54:07,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=994, Invalid=4118, Unknown=0, NotChecked=0, Total=5112 [2022-11-23 14:54:07,475 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand has 65 states, 65 states have (on average 2.6153846153846154) internal successors, (170), 64 states have internal predecessors, (170), 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 14:54:08,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:54:08,051 INFO L93 Difference]: Finished difference Result 172 states and 175 transitions. [2022-11-23 14:54:08,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-23 14:54:08,052 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.6153846153846154) internal successors, (170), 64 states have internal predecessors, (170), 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 104 [2022-11-23 14:54:08,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:54:08,053 INFO L225 Difference]: With dead ends: 172 [2022-11-23 14:54:08,053 INFO L226 Difference]: Without dead ends: 108 [2022-11-23 14:54:08,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 242 SyntacticMatches, 40 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3176 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=994, Invalid=4118, Unknown=0, NotChecked=0, Total=5112 [2022-11-23 14:54:08,053 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:54:08,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 180 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:54:08,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-11-23 14:54:08,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-11-23 14:54:08,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.02803738317757) internal successors, (110), 107 states have internal predecessors, (110), 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 14:54:08,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2022-11-23 14:54:08,172 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 104 [2022-11-23 14:54:08,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:54:08,172 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2022-11-23 14:54:08,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.6153846153846154) internal successors, (170), 64 states have internal predecessors, (170), 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 14:54:08,172 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2022-11-23 14:54:08,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-11-23 14:54:08,172 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:54:08,173 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 20, 19, 19, 1, 1, 1, 1, 1] [2022-11-23 14:54:08,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-11-23 14:54:08,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:54:08,373 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:54:08,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:54:08,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1658090047, now seen corresponding path program 49 times [2022-11-23 14:54:08,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:54:08,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72650316] [2022-11-23 14:54:08,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:54:08,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:54:08,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:54:10,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:54:10,961 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:54:10,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72650316] [2022-11-23 14:54:10,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72650316] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:54:10,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005715051] [2022-11-23 14:54:10,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:54:10,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:54:10,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:54:10,972 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:54:10,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-11-23 14:54:11,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:54:11,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 115 conjunts are in the unsatisfiable core [2022-11-23 14:54:11,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:54:13,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:54:15,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:54:15,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:54:15,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:54:17,738 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-11-23 14:54:17,740 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-11-23 14:54:20,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:54:20,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005715051] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:54:20,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1469318154] [2022-11-23 14:54:20,439 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:54:20,439 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:54:20,439 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:54:20,439 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:54:20,439 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:54:20,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:54:20,481 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:54:20,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:54:20,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:54:20,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:54:20,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:54:20,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:54:20,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:54:20,579 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:54:20,610 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:54:20,610 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 234 treesize of output 236 [2022-11-23 14:54:20,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:54:20,755 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:54:22,706 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '37932#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:54:22,706 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:54:22,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:54:22,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 129 [2022-11-23 14:54:22,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150164240] [2022-11-23 14:54:22,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:54:22,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-11-23 14:54:22,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:54:22,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-11-23 14:54:22,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=18162, Unknown=0, NotChecked=0, Total=18632 [2022-11-23 14:54:22,709 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand has 130 states, 130 states have (on average 2.423076923076923) internal successors, (315), 129 states have internal predecessors, (315), 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 14:54:29,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:54:29,066 INFO L93 Difference]: Finished difference Result 178 states and 181 transitions. [2022-11-23 14:54:29,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-23 14:54:29,066 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.423076923076923) internal successors, (315), 129 states have internal predecessors, (315), 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 106 [2022-11-23 14:54:29,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:54:29,067 INFO L225 Difference]: With dead ends: 178 [2022-11-23 14:54:29,067 INFO L226 Difference]: Without dead ends: 176 [2022-11-23 14:54:29,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5551 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=702, Invalid=25058, Unknown=0, NotChecked=0, Total=25760 [2022-11-23 14:54:29,070 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 136 mSDsluCounter, 1833 mSDsCounter, 0 mSdLazyCounter, 6672 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1859 SdHoareTripleChecker+Invalid, 6674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-11-23 14:54:29,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 1859 Invalid, 6674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 6672 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-11-23 14:54:29,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-11-23 14:54:29,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 113. [2022-11-23 14:54:29,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0357142857142858) internal successors, (116), 112 states have internal predecessors, (116), 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 14:54:29,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2022-11-23 14:54:29,222 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 106 [2022-11-23 14:54:29,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:54:29,222 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2022-11-23 14:54:29,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 2.423076923076923) internal successors, (315), 129 states have internal predecessors, (315), 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 14:54:29,223 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2022-11-23 14:54:29,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-23 14:54:29,223 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:54:29,223 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 20, 19, 19, 1, 1, 1, 1, 1] [2022-11-23 14:54:29,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-11-23 14:54:29,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-11-23 14:54:29,424 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:54:29,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:54:29,424 INFO L85 PathProgramCache]: Analyzing trace with hash 725991585, now seen corresponding path program 3 times [2022-11-23 14:54:29,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:54:29,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61057674] [2022-11-23 14:54:29,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:54:29,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:54:29,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:54:29,999 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2022-11-23 14:54:29,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:54:29,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61057674] [2022-11-23 14:54:29,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61057674] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:54:29,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670090919] [2022-11-23 14:54:29,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:54:29,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:54:30,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:54:30,000 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:54:30,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-11-23 14:54:30,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:54:30,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:54:30,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-23 14:54:30,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:54:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2022-11-23 14:54:31,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:54:32,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2022-11-23 14:54:32,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670090919] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:54:32,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2132074380] [2022-11-23 14:54:32,415 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:54:32,415 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:54:32,415 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:54:32,415 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:54:32,416 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:54:32,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:54:32,454 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 14:54:32,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-23 14:54:32,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:54:32,491 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:54:32,492 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:54:32,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:54:32,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:54:32,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:54:32,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:54:32,582 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:54:32,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 238 treesize of output 240 [2022-11-23 14:54:32,652 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:54:32,732 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:54:33,361 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '39094#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a~0#1.offset|) (<= |#NULL.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= ~N~0 100000) (<= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 100000 ~N~0) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (<= 1 |ULTIMATE.start_main_~k~0#1|) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 0 |#NULL.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-11-23 14:54:33,361 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:54:33,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:54:33,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 70 [2022-11-23 14:54:33,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584523754] [2022-11-23 14:54:33,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:54:33,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-11-23 14:54:33,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:54:33,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-11-23 14:54:33,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2284, Invalid=3722, Unknown=0, NotChecked=0, Total=6006 [2022-11-23 14:54:33,363 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand has 71 states, 71 states have (on average 2.028169014084507) internal successors, (144), 70 states have internal predecessors, (144), 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 14:54:36,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:54:36,555 INFO L93 Difference]: Finished difference Result 1771 states and 1821 transitions. [2022-11-23 14:54:36,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-23 14:54:36,556 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.028169014084507) internal successors, (144), 70 states have internal predecessors, (144), 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 107 [2022-11-23 14:54:36,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:54:36,561 INFO L225 Difference]: With dead ends: 1771 [2022-11-23 14:54:36,561 INFO L226 Difference]: Without dead ends: 1709 [2022-11-23 14:54:36,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2844 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2284, Invalid=3722, Unknown=0, NotChecked=0, Total=6006 [2022-11-23 14:54:36,563 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 500 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 500 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 14:54:36,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [500 Valid, 157 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 14:54:36,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1709 states. [2022-11-23 14:54:36,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1709 to 160. [2022-11-23 14:54:36,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.169811320754717) internal successors, (186), 159 states have internal predecessors, (186), 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 14:54:36,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 186 transitions. [2022-11-23 14:54:36,743 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 186 transitions. Word has length 107 [2022-11-23 14:54:36,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:54:36,744 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 186 transitions. [2022-11-23 14:54:36,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.028169014084507) internal successors, (144), 70 states have internal predecessors, (144), 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 14:54:36,744 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 186 transitions. [2022-11-23 14:54:36,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-23 14:54:36,745 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:54:36,745 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 20, 19, 19, 1, 1, 1, 1, 1] [2022-11-23 14:54:36,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-11-23 14:54:36,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-11-23 14:54:36,954 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:54:36,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:54:36,955 INFO L85 PathProgramCache]: Analyzing trace with hash -2053589766, now seen corresponding path program 50 times [2022-11-23 14:54:36,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:54:36,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821457151] [2022-11-23 14:54:36,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:54:36,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:54:37,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:54:39,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 0 proven. 1057 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:54:39,481 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:54:39,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821457151] [2022-11-23 14:54:39,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821457151] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:54:39,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907277824] [2022-11-23 14:54:39,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:54:39,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:54:39,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:54:39,483 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:54:39,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-11-23 14:54:42,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-11-23 14:54:42,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:54:42,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 102 conjunts are in the unsatisfiable core [2022-11-23 14:54:42,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:54:42,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:54:42,927 INFO L321 Elim1Store]: treesize reduction 21, result has 47.5 percent of original size [2022-11-23 14:54:42,927 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 27 treesize of output 34 [2022-11-23 14:54:47,891 INFO L321 Elim1Store]: treesize reduction 12, result has 67.6 percent of original size [2022-11-23 14:54:47,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 36 [2022-11-23 14:54:48,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 496 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:54:48,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:54:52,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2022-11-23 14:54:52,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 74 [2022-11-23 14:54:56,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 513 proven. 544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:54:56,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907277824] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:54:56,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [258108130] [2022-11-23 14:54:56,180 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:54:56,180 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:54:56,180 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:54:56,180 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:54:56,180 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:54:56,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:54:56,216 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 14:54:56,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-23 14:54:56,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:54:56,256 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:54:56,256 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:54:56,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:54:56,284 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-11-23 14:54:56,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:54:56,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:54:56,363 INFO L321 Elim1Store]: treesize reduction 74, result has 30.8 percent of original size [2022-11-23 14:54:56,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 253 treesize of output 259 [2022-11-23 14:54:56,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:54:56,530 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:54:58,568 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '42445#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:54:58,568 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:54:58,568 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:54:58,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 46, 45] total 114 [2022-11-23 14:54:58,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117298584] [2022-11-23 14:54:58,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:54:58,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-11-23 14:54:58,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:54:58,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-11-23 14:54:58,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1425, Invalid=13337, Unknown=0, NotChecked=0, Total=14762 [2022-11-23 14:54:58,571 INFO L87 Difference]: Start difference. First operand 160 states and 186 transitions. Second operand has 115 states, 115 states have (on average 2.4695652173913043) internal successors, (284), 114 states have internal predecessors, (284), 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 14:55:09,121 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-23 14:55:17,782 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2022-11-23 14:56:58,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:56:58,247 INFO L93 Difference]: Finished difference Result 346 states and 374 transitions. [2022-11-23 14:56:58,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-11-23 14:56:58,247 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.4695652173913043) internal successors, (284), 114 states have internal predecessors, (284), 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 108 [2022-11-23 14:56:58,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:56:58,248 INFO L225 Difference]: With dead ends: 346 [2022-11-23 14:56:58,248 INFO L226 Difference]: Without dead ends: 156 [2022-11-23 14:56:58,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 245 SyntacticMatches, 2 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17006 ImplicationChecksByTransitivity, 119.2s TimeCoverageRelationStatistics Valid=7292, Invalid=62587, Unknown=81, NotChecked=0, Total=69960 [2022-11-23 14:56:58,255 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 454 mSDsluCounter, 1501 mSDsCounter, 0 mSdLazyCounter, 5455 mSolverCounterSat, 42 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 1545 SdHoareTripleChecker+Invalid, 5502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 5455 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:56:58,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [454 Valid, 1545 Invalid, 5502 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [42 Valid, 5455 Invalid, 5 Unknown, 0 Unchecked, 13.9s Time] [2022-11-23 14:56:58,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-11-23 14:56:58,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2022-11-23 14:56:58,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.1548387096774193) internal successors, (179), 155 states have internal predecessors, (179), 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 14:56:58,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 179 transitions. [2022-11-23 14:56:58,407 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 179 transitions. Word has length 108 [2022-11-23 14:56:58,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:56:58,407 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 179 transitions. [2022-11-23 14:56:58,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.4695652173913043) internal successors, (284), 114 states have internal predecessors, (284), 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 14:56:58,407 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 179 transitions. [2022-11-23 14:56:58,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-23 14:56:58,408 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:56:58,408 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 20, 19, 19, 1, 1, 1, 1, 1] [2022-11-23 14:56:58,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-11-23 14:56:58,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:56:58,609 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:56:58,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:56:58,609 INFO L85 PathProgramCache]: Analyzing trace with hash 436065452, now seen corresponding path program 51 times [2022-11-23 14:56:58,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:56:58,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465837047] [2022-11-23 14:56:58,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:56:58,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:56:58,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:57:01,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1151 backedges. 2 proven. 1149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:57:01,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:57:01,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465837047] [2022-11-23 14:57:01,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465837047] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:57:01,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753864995] [2022-11-23 14:57:01,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:57:01,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:57:01,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:57:01,460 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:57:01,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-11-23 14:57:03,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:57:03,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:57:03,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 129 conjunts are in the unsatisfiable core [2022-11-23 14:57:03,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:57:05,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:57:05,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:05,893 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-23 14:57:05,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:06,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-23 14:57:06,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:06,110 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-23 14:57:08,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:57:08,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1151 backedges. 6 proven. 1145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:57:08,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:57:19,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2022-11-23 14:57:19,125 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1218 treesize of output 1202 [2022-11-23 14:57:22,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1151 backedges. 2 proven. 1149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:57:22,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753864995] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:57:22,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [422365770] [2022-11-23 14:57:22,738 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:57:22,738 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:57:22,738 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:57:22,738 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:57:22,739 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:57:22,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:22,781 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:57:22,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:57:22,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:22,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:57:22,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:22,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 37 [2022-11-23 14:57:22,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:22,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:22,878 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-23 14:57:22,879 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 247 treesize of output 243 [2022-11-23 14:57:22,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:57:23,044 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:57:25,018 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '44244#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:57:25,018 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:57:25,018 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:57:25,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 48, 48] total 140 [2022-11-23 14:57:25,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253082540] [2022-11-23 14:57:25,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:57:25,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-11-23 14:57:25,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:57:25,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-11-23 14:57:25,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=21200, Unknown=4, NotChecked=0, Total=21756 [2022-11-23 14:57:25,022 INFO L87 Difference]: Start difference. First operand 156 states and 179 transitions. Second operand has 141 states, 141 states have (on average 2.3617021276595747) internal successors, (333), 140 states have internal predecessors, (333), 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 14:57:32,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:57:32,930 INFO L93 Difference]: Finished difference Result 163 states and 186 transitions. [2022-11-23 14:57:32,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-23 14:57:32,931 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 2.3617021276595747) internal successors, (333), 140 states have internal predecessors, (333), 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 112 [2022-11-23 14:57:32,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:57:32,931 INFO L225 Difference]: With dead ends: 163 [2022-11-23 14:57:32,932 INFO L226 Difference]: Without dead ends: 161 [2022-11-23 14:57:32,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8660 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=1401, Invalid=36037, Unknown=4, NotChecked=0, Total=37442 [2022-11-23 14:57:32,935 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 170 mSDsluCounter, 1369 mSDsCounter, 0 mSdLazyCounter, 6157 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 1391 SdHoareTripleChecker+Invalid, 6187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 6157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:57:32,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 1391 Invalid, 6187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 6157 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-11-23 14:57:32,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-11-23 14:57:33,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2022-11-23 14:57:33,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.1518987341772151) internal successors, (182), 158 states have internal predecessors, (182), 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 14:57:33,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 182 transitions. [2022-11-23 14:57:33,123 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 182 transitions. Word has length 112 [2022-11-23 14:57:33,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:57:33,123 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 182 transitions. [2022-11-23 14:57:33,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 2.3617021276595747) internal successors, (333), 140 states have internal predecessors, (333), 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 14:57:33,124 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 182 transitions. [2022-11-23 14:57:33,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-11-23 14:57:33,124 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:57:33,124 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 21, 20, 20, 1, 1, 1, 1, 1] [2022-11-23 14:57:33,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-11-23 14:57:33,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-11-23 14:57:33,327 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:57:33,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:57:33,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1445066712, now seen corresponding path program 52 times [2022-11-23 14:57:33,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:57:33,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593823614] [2022-11-23 14:57:33,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:57:33,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:57:33,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:57:36,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 0 proven. 1210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:57:36,640 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:57:36,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593823614] [2022-11-23 14:57:36,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593823614] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:57:36,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239201012] [2022-11-23 14:57:36,641 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-23 14:57:36,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:57:36,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:57:36,642 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:57:36,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-11-23 14:57:36,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:57:36,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 621 conjuncts, 126 conjunts are in the unsatisfiable core [2022-11-23 14:57:36,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:57:39,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-11-23 14:57:39,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:39,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-23 14:57:39,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:39,305 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2022-11-23 14:57:41,863 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-23 14:57:41,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 2 proven. 1208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:57:41,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:57:45,080 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2022-11-23 14:57:45,084 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 138 [2022-11-23 14:57:48,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 0 proven. 1210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:57:48,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239201012] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:57:48,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [823582532] [2022-11-23 14:57:48,266 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:57:48,266 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:57:48,266 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:57:48,267 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:57:48,267 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:57:48,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:48,309 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:57:48,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:57:48,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:48,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:57:48,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:48,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:57:48,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:57:48,385 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:57:48,415 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:57:48,415 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 238 treesize of output 240 [2022-11-23 14:57:48,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:57:48,586 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:57:50,500 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '45628#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:57:50,500 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:57:50,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:57:50,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 141 [2022-11-23 14:57:50,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710342052] [2022-11-23 14:57:50,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:57:50,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-11-23 14:57:50,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:57:50,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-11-23 14:57:50,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=529, Invalid=21523, Unknown=0, NotChecked=0, Total=22052 [2022-11-23 14:57:50,502 INFO L87 Difference]: Start difference. First operand 159 states and 182 transitions. Second operand has 142 states, 142 states have (on average 2.408450704225352) internal successors, (342), 141 states have internal predecessors, (342), 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 14:57:59,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:57:59,532 INFO L93 Difference]: Finished difference Result 166 states and 189 transitions. [2022-11-23 14:57:59,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-11-23 14:57:59,532 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 2.408450704225352) internal successors, (342), 141 states have internal predecessors, (342), 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 115 [2022-11-23 14:57:59,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:57:59,533 INFO L225 Difference]: With dead ends: 166 [2022-11-23 14:57:59,533 INFO L226 Difference]: Without dead ends: 164 [2022-11-23 14:57:59,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8445 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=1215, Invalid=36227, Unknown=0, NotChecked=0, Total=37442 [2022-11-23 14:57:59,535 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 386 mSDsluCounter, 1902 mSDsCounter, 0 mSdLazyCounter, 7845 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 1926 SdHoareTripleChecker+Invalid, 7872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 7845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-11-23 14:57:59,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 1926 Invalid, 7872 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [27 Valid, 7845 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-11-23 14:57:59,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-11-23 14:57:59,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2022-11-23 14:57:59,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.1490683229813665) internal successors, (185), 161 states have internal predecessors, (185), 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 14:57:59,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 185 transitions. [2022-11-23 14:57:59,709 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 185 transitions. Word has length 115 [2022-11-23 14:57:59,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:57:59,709 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 185 transitions. [2022-11-23 14:57:59,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 2.408450704225352) internal successors, (342), 141 states have internal predecessors, (342), 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 14:57:59,710 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 185 transitions. [2022-11-23 14:57:59,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-23 14:57:59,710 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:57:59,710 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 22, 21, 21, 1, 1, 1, 1, 1] [2022-11-23 14:57:59,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-11-23 14:57:59,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-11-23 14:57:59,911 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:57:59,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:57:59,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1520086228, now seen corresponding path program 53 times [2022-11-23 14:57:59,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:57:59,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319663241] [2022-11-23 14:57:59,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:57:59,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:57:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:58:03,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1272 backedges. 0 proven. 1272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:58:03,069 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:58:03,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319663241] [2022-11-23 14:58:03,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319663241] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:58:03,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110102462] [2022-11-23 14:58:03,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 14:58:03,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:58:03,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:58:03,071 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:58:03,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-11-23 14:58:05,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2022-11-23 14:58:05,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:58:05,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 131 conjunts are in the unsatisfiable core [2022-11-23 14:58:05,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:58:06,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:58:06,326 INFO L321 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2022-11-23 14:58:06,327 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 27 treesize of output 26 [2022-11-23 14:58:08,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-11-23 14:58:08,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1272 backedges. 0 proven. 1272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:58:08,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:58:11,304 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-11-23 14:58:11,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 62 [2022-11-23 14:58:14,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1272 backedges. 0 proven. 1272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:58:14,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110102462] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:58:14,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1498500118] [2022-11-23 14:58:14,241 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:58:14,241 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:58:14,241 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:58:14,242 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:58:14,242 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:58:14,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:58:14,282 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:58:14,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:58:14,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:58:14,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 7 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 34 [2022-11-23 14:58:14,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:58:14,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-23 14:58:14,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:58:14,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-23 14:58:14,411 INFO L321 Elim1Store]: treesize reduction 62, result has 25.3 percent of original size [2022-11-23 14:58:14,411 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 238 treesize of output 240 [2022-11-23 14:58:14,500 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:58:14,599 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:58:16,490 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '47017#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:58:16,490 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:58:16,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:58:16,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50, 50] total 122 [2022-11-23 14:58:16,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564215740] [2022-11-23 14:58:16,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:58:16,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-11-23 14:58:16,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:58:16,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-11-23 14:58:16,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=421, Invalid=16349, Unknown=0, NotChecked=0, Total=16770 [2022-11-23 14:58:16,492 INFO L87 Difference]: Start difference. First operand 162 states and 185 transitions. Second operand has 123 states, 123 states have (on average 2.4634146341463414) internal successors, (303), 122 states have internal predecessors, (303), 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 14:58:27,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 14:58:27,276 INFO L93 Difference]: Finished difference Result 169 states and 192 transitions. [2022-11-23 14:58:27,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-11-23 14:58:27,277 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.4634146341463414) internal successors, (303), 122 states have internal predecessors, (303), 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 118 [2022-11-23 14:58:27,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 14:58:27,277 INFO L225 Difference]: With dead ends: 169 [2022-11-23 14:58:27,277 INFO L226 Difference]: Without dead ends: 167 [2022-11-23 14:58:27,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 271 SyntacticMatches, 2 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5930 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=994, Invalid=30868, Unknown=0, NotChecked=0, Total=31862 [2022-11-23 14:58:27,279 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 332 mSDsluCounter, 1637 mSDsCounter, 0 mSdLazyCounter, 6895 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 6925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 6895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-11-23 14:58:27,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 1661 Invalid, 6925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 6895 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-11-23 14:58:27,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-23 14:58:27,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2022-11-23 14:58:27,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.146341463414634) internal successors, (188), 164 states have internal predecessors, (188), 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 14:58:27,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 188 transitions. [2022-11-23 14:58:27,454 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 188 transitions. Word has length 118 [2022-11-23 14:58:27,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 14:58:27,454 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 188 transitions. [2022-11-23 14:58:27,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.4634146341463414) internal successors, (303), 122 states have internal predecessors, (303), 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 14:58:27,455 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 188 transitions. [2022-11-23 14:58:27,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-11-23 14:58:27,455 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 14:58:27,455 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 23, 22, 22, 1, 1, 1, 1, 1] [2022-11-23 14:58:27,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-11-23 14:58:27,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:58:27,656 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 14:58:27,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 14:58:27,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1251473832, now seen corresponding path program 54 times [2022-11-23 14:58:27,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 14:58:27,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147496011] [2022-11-23 14:58:27,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 14:58:27,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 14:58:27,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 14:58:30,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 0 proven. 1337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:58:30,764 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 14:58:30,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147496011] [2022-11-23 14:58:30,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147496011] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 14:58:30,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222110540] [2022-11-23 14:58:30,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 14:58:30,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 14:58:30,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 14:58:30,765 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 14:58:30,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6baf8e02-a190-404b-a97b-136f1964cbe1/bin/utaipan-Q6hlc19bkW/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-11-23 14:58:32,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-23 14:58:32,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 14:58:32,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 111 conjunts are in the unsatisfiable core [2022-11-23 14:58:32,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 14:58:32,734 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-23 14:58:36,711 INFO L321 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-11-23 14:58:36,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-11-23 14:58:36,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 694 proven. 643 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:58:36,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 14:58:42,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-11-23 14:58:42,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2022-11-23 14:58:45,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1337 backedges. 693 proven. 644 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 14:58:45,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222110540] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 14:58:45,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1459242469] [2022-11-23 14:58:45,904 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-11-23 14:58:45,904 INFO L166 IcfgInterpreter]: Building call graph [2022-11-23 14:58:45,904 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-23 14:58:45,904 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-23 14:58:45,904 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-23 14:58:45,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:58:45,939 INFO L321 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-11-23 14:58:45,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 42 [2022-11-23 14:58:45,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:58:45,976 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2022-11-23 14:58:45,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 8 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 32 treesize of output 49 [2022-11-23 14:58:45,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:58:45,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-23 14:58:46,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:58:46,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-23 14:58:46,079 INFO L321 Elim1Store]: treesize reduction 53, result has 11.7 percent of original size [2022-11-23 14:58:46,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 241 treesize of output 237 [2022-11-23 14:58:46,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-23 14:58:46,213 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-23 14:58:47,928 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '48445#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= 1 |ULTIMATE.start_main_~i~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= |ULTIMATE.start___VERIFIER_assert_#in~cond#1| 1) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (<= 1 |ULTIMATE.start_main_~k~0#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~i~0#1| 100000) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= 100000 ~N~0))' at error location [2022-11-23 14:58:47,928 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-23 14:58:47,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-23 14:58:47,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 51, 51] total 127 [2022-11-23 14:58:47,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059859118] [2022-11-23 14:58:47,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-23 14:58:47,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-11-23 14:58:47,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 14:58:47,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-11-23 14:58:47,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1792, Invalid=16296, Unknown=2, NotChecked=0, Total=18090 [2022-11-23 14:58:47,930 INFO L87 Difference]: Start difference. First operand 165 states and 188 transitions. Second operand has 128 states, 128 states have (on average 2.4765625) internal successors, (317), 127 states have internal predecessors, (317), 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)