./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_copy3_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_copy3_ground-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2f5e2fdf471d9474a6f7c402053ba8a4914a495c159bf70e3ae967f3495d9882 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 12:15:03,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 12:15:03,011 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 12:15:03,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 12:15:03,023 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 12:15:03,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 12:15:03,025 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 12:15:03,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 12:15:03,026 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 12:15:03,027 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 12:15:03,027 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 12:15:03,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 12:15:03,028 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 12:15:03,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 12:15:03,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 12:15:03,030 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 12:15:03,031 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 12:15:03,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 12:15:03,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 12:15:03,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 12:15:03,034 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 12:15:03,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 12:15:03,036 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 12:15:03,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 12:15:03,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 12:15:03,041 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 12:15:03,041 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 12:15:03,042 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 12:15:03,042 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 12:15:03,043 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 12:15:03,044 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 12:15:03,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 12:15:03,045 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 12:15:03,046 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 12:15:03,047 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 12:15:03,047 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 12:15:03,047 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 12:15:03,048 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 12:15:03,048 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 12:15:03,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 12:15:03,049 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 12:15:03,049 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 12:15:03,068 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 12:15:03,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 12:15:03,068 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 12:15:03,068 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 12:15:03,069 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 12:15:03,069 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 12:15:03,069 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 12:15:03,069 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 12:15:03,069 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 12:15:03,070 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 12:15:03,074 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 12:15:03,074 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 12:15:03,074 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 12:15:03,074 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 12:15:03,075 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 12:15:03,075 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 12:15:03,075 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 12:15:03,075 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 12:15:03,075 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 12:15:03,076 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 12:15:03,076 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 12:15:03,076 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 12:15:03,076 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 12:15:03,076 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 12:15:03,076 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 12:15:03,076 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 12:15:03,076 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 12:15:03,077 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 12:15:03,077 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 12:15:03,077 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 12:15:03,077 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 12:15:03,077 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 12:15:03,077 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:15:03,077 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 12:15:03,077 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 12:15:03,078 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 12:15:03,078 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 12:15:03,078 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 12:15:03,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 12:15:03,078 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 12:15:03,078 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 12:15:03,078 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_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f5e2fdf471d9474a6f7c402053ba8a4914a495c159bf70e3ae967f3495d9882 [2022-12-14 12:15:03,240 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 12:15:03,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 12:15:03,261 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 12:15:03,261 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 12:15:03,262 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 12:15:03,263 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-examples/standard_copy3_ground-1.i [2022-12-14 12:15:05,769 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 12:15:05,929 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 12:15:05,929 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/sv-benchmarks/c/array-examples/standard_copy3_ground-1.i [2022-12-14 12:15:05,933 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/data/d2538323f/532ea1f75fe248d89f5737a46f2c2c38/FLAG658406cce [2022-12-14 12:15:05,943 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/data/d2538323f/532ea1f75fe248d89f5737a46f2c2c38 [2022-12-14 12:15:05,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 12:15:05,945 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 12:15:05,946 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 12:15:05,946 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 12:15:05,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 12:15:05,950 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:15:05" (1/1) ... [2022-12-14 12:15:05,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3015fc29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:05, skipping insertion in model container [2022-12-14 12:15:05,951 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 12:15:05" (1/1) ... [2022-12-14 12:15:05,956 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 12:15:05,965 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 12:15:06,063 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_cf65f0dd-228e-4852-bf07-0cd84f660fa3/sv-benchmarks/c/array-examples/standard_copy3_ground-1.i[816,829] [2022-12-14 12:15:06,074 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:15:06,081 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 12:15:06,089 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_cf65f0dd-228e-4852-bf07-0cd84f660fa3/sv-benchmarks/c/array-examples/standard_copy3_ground-1.i[816,829] [2022-12-14 12:15:06,095 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 12:15:06,104 INFO L208 MainTranslator]: Completed translation [2022-12-14 12:15:06,104 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:06 WrapperNode [2022-12-14 12:15:06,104 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 12:15:06,105 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 12:15:06,105 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 12:15:06,105 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 12:15:06,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:06" (1/1) ... [2022-12-14 12:15:06,116 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:06" (1/1) ... [2022-12-14 12:15:06,128 INFO L138 Inliner]: procedures = 16, calls = 28, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2022-12-14 12:15:06,128 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 12:15:06,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 12:15:06,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 12:15:06,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 12:15:06,136 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:06" (1/1) ... [2022-12-14 12:15:06,136 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:06" (1/1) ... [2022-12-14 12:15:06,137 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:06" (1/1) ... [2022-12-14 12:15:06,137 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:06" (1/1) ... [2022-12-14 12:15:06,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:06" (1/1) ... [2022-12-14 12:15:06,144 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:06" (1/1) ... [2022-12-14 12:15:06,144 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:06" (1/1) ... [2022-12-14 12:15:06,145 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:06" (1/1) ... [2022-12-14 12:15:06,146 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 12:15:06,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 12:15:06,147 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 12:15:06,147 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 12:15:06,148 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:06" (1/1) ... [2022-12-14 12:15:06,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 12:15:06,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:15:06,171 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 12:15:06,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 12:15:06,205 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 12:15:06,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 12:15:06,206 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 12:15:06,206 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 12:15:06,206 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 12:15:06,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 12:15:06,207 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 12:15:06,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 12:15:06,262 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 12:15:06,264 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 12:15:06,391 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 12:15:06,440 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 12:15:06,440 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2022-12-14 12:15:06,442 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:15:06 BoogieIcfgContainer [2022-12-14 12:15:06,442 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 12:15:06,443 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 12:15:06,444 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 12:15:06,446 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 12:15:06,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 12:15:05" (1/3) ... [2022-12-14 12:15:06,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12d8f4d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:15:06, skipping insertion in model container [2022-12-14 12:15:06,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 12:15:06" (2/3) ... [2022-12-14 12:15:06,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12d8f4d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 12:15:06, skipping insertion in model container [2022-12-14 12:15:06,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 12:15:06" (3/3) ... [2022-12-14 12:15:06,448 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy3_ground-1.i [2022-12-14 12:15:06,463 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 12:15:06,463 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 12:15:06,508 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 12:15:06,514 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;@14e8bd6b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 12:15:06,514 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 12:15:06,517 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:06,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 12:15:06,521 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:15:06,522 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:15:06,522 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:15:06,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:15:06,526 INFO L85 PathProgramCache]: Analyzing trace with hash 902400515, now seen corresponding path program 1 times [2022-12-14 12:15:06,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:15:06,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486966234] [2022-12-14 12:15:06,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:06,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:15:06,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:15:06,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:15:06,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:15:06,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486966234] [2022-12-14 12:15:06,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486966234] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:15:06,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 12:15:06,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 12:15:06,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767003544] [2022-12-14 12:15:06,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:15:06,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:15:06,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:15:06,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:15:06,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:15:06,746 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:06,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:15:06,795 INFO L93 Difference]: Finished difference Result 21 states and 31 transitions. [2022-12-14 12:15:06,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:15:06,798 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 12:15:06,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:15:06,805 INFO L225 Difference]: With dead ends: 21 [2022-12-14 12:15:06,806 INFO L226 Difference]: Without dead ends: 11 [2022-12-14 12:15:06,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 12:15:06,812 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:15:06,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:15:06,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-12-14 12:15:06,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-12-14 12:15:06,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:06,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2022-12-14 12:15:06,842 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 8 [2022-12-14 12:15:06,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:15:06,842 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2022-12-14 12:15:06,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:06,843 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2022-12-14 12:15:06,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 12:15:06,843 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:15:06,844 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:15:06,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 12:15:06,844 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:15:06,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:15:06,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1497175584, now seen corresponding path program 1 times [2022-12-14 12:15:06,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:15:06,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355183979] [2022-12-14 12:15:06,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:06,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:15:06,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:15:06,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 12:15:06,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:15:06,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355183979] [2022-12-14 12:15:06,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355183979] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:15:06,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8215536] [2022-12-14 12:15:06,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:06,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:06,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:15:06,936 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:15:06,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 12:15:07,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:15:07,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2022-12-14 12:15:07,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:15:07,024 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 12:15:07,024 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-14 12:15:07,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8215536] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 12:15:07,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-14 12:15:07,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-14 12:15:07,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489514174] [2022-12-14 12:15:07,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 12:15:07,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 12:15:07,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:15:07,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 12:15:07,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:15:07,027 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:07,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:15:07,052 INFO L93 Difference]: Finished difference Result 21 states and 30 transitions. [2022-12-14 12:15:07,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 12:15:07,052 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 12:15:07,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:15:07,053 INFO L225 Difference]: With dead ends: 21 [2022-12-14 12:15:07,053 INFO L226 Difference]: Without dead ends: 14 [2022-12-14 12:15:07,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 12:15:07,055 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:15:07,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:15:07,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-12-14 12:15:07,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-12-14 12:15:07,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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) [2022-12-14 12:15:07,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2022-12-14 12:15:07,058 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 9 [2022-12-14 12:15:07,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:15:07,058 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2022-12-14 12:15:07,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:07,059 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2022-12-14 12:15:07,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-14 12:15:07,059 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:15:07,059 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:15:07,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 12:15:07,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:07,262 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:15:07,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:15:07,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1887459613, now seen corresponding path program 1 times [2022-12-14 12:15:07,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:15:07,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585457054] [2022-12-14 12:15:07,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:07,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:15:07,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:15:07,440 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 12:15:07,440 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:15:07,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585457054] [2022-12-14 12:15:07,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585457054] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:15:07,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216346194] [2022-12-14 12:15:07,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:07,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:07,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:15:07,442 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:15:07,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 12:15:07,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:15:07,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:15:07,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:15:07,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 12:15:07,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:15:07,543 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 12:15:07,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216346194] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:15:07,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [775544600] [2022-12-14 12:15:07,557 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:15:07,557 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:15:07,560 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:15:07,564 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:15:07,564 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:15:07,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:07,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:07,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:07,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:07,715 INFO L321 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2022-12-14 12:15:07,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-12-14 12:15:07,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:07,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:07,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:07,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:07,842 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-12-14 12:15:07,842 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-12-14 12:15:07,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:07,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 12:15:08,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:08,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:08,077 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 12:15:08,078 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 378 treesize of output 377 [2022-12-14 12:15:08,240 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 16 treesize of output 12 [2022-12-14 12:15:08,263 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:15:08,264 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 12:15:08,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:08,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:08,338 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 12:15:08,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-12-14 12:15:08,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:08,416 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:08,417 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:08,445 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:15:08,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 12:15:08,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:08,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:08,523 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 12:15:08,523 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-12-14 12:15:08,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:08,600 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:08,601 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:08,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:08,622 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:08,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:08,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:08,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:08,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:08,661 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 12:15:08,662 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 97 [2022-12-14 12:15:08,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:08,699 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:08,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:08,713 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:15:08,864 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '223#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-12-14 12:15:08,864 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:15:08,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:15:08,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 12:15:08,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042573130] [2022-12-14 12:15:08,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:15:08,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:15:08,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:15:08,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:15:08,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 12:15:08,867 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:08,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:15:08,897 INFO L93 Difference]: Finished difference Result 28 states and 38 transitions. [2022-12-14 12:15:08,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:15:08,898 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 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 12 [2022-12-14 12:15:08,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:15:08,898 INFO L225 Difference]: With dead ends: 28 [2022-12-14 12:15:08,898 INFO L226 Difference]: Without dead ends: 17 [2022-12-14 12:15:08,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 12:15:08,900 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:15:08,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:15:08,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-12-14 12:15:08,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-12-14 12:15:08,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:08,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-12-14 12:15:08,902 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 12 [2022-12-14 12:15:08,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:15:08,902 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-12-14 12:15:08,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:08,903 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-12-14 12:15:08,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 12:15:08,903 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:15:08,903 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:15:08,907 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 12:15:09,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:09,105 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:15:09,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:15:09,106 INFO L85 PathProgramCache]: Analyzing trace with hash 670832800, now seen corresponding path program 2 times [2022-12-14 12:15:09,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:15:09,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498922401] [2022-12-14 12:15:09,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:09,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:15:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:15:09,304 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:15:09,304 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:15:09,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498922401] [2022-12-14 12:15:09,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498922401] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:15:09,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711117386] [2022-12-14 12:15:09,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:15:09,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:09,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:15:09,306 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:15:09,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 12:15:09,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 12:15:09,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:15:09,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 12:15:09,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:15:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:15:09,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:15:09,381 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 12:15:09,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711117386] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:15:09,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1337698576] [2022-12-14 12:15:09,383 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:15:09,383 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:15:09,384 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:15:09,384 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:15:09,384 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:15:09,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:09,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:09,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:09,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:09,493 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-12-14 12:15:09,493 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-12-14 12:15:09,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:09,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:09,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:09,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:09,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2022-12-14 12:15:09,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:09,545 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 12:15:09,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:09,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:09,641 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 12:15:09,641 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 388 treesize of output 376 [2022-12-14 12:15:09,727 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 16 treesize of output 12 [2022-12-14 12:15:09,747 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:15:09,748 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 12:15:09,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:09,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:09,805 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 12:15:09,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-12-14 12:15:09,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:09,854 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:09,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:09,874 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:15:09,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 12:15:09,897 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:09,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:09,933 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 12:15:09,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-12-14 12:15:09,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:09,985 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:09,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:10,006 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:15:10,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 12:15:10,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:10,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:10,060 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 12:15:10,061 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-12-14 12:15:10,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:10,105 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:10,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:10,118 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:15:10,269 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '395#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-12-14 12:15:10,269 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:15:10,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:15:10,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-12-14 12:15:10,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162329940] [2022-12-14 12:15:10,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:15:10,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 12:15:10,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:15:10,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 12:15:10,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 12:15:10,271 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:10,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:15:10,313 INFO L93 Difference]: Finished difference Result 35 states and 50 transitions. [2022-12-14 12:15:10,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 12:15:10,314 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 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 15 [2022-12-14 12:15:10,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:15:10,314 INFO L225 Difference]: With dead ends: 35 [2022-12-14 12:15:10,314 INFO L226 Difference]: Without dead ends: 26 [2022-12-14 12:15:10,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2022-12-14 12:15:10,315 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:15:10,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:15:10,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-12-14 12:15:10,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-12-14 12:15:10,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:10,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-12-14 12:15:10,319 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 15 [2022-12-14 12:15:10,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:15:10,319 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-12-14 12:15:10,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:10,319 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-12-14 12:15:10,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 12:15:10,320 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:15:10,320 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:15:10,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 12:15:10,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:10,522 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:15:10,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:15:10,524 INFO L85 PathProgramCache]: Analyzing trace with hash 126503043, now seen corresponding path program 3 times [2022-12-14 12:15:10,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:15:10,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064647366] [2022-12-14 12:15:10,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:10,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:15:10,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:15:10,741 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 12:15:10,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:15:10,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064647366] [2022-12-14 12:15:10,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064647366] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:15:10,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974493023] [2022-12-14 12:15:10,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:15:10,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:10,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:15:10,743 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:15:10,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 12:15:10,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:15:10,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:15:10,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 12:15:10,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:15:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 12:15:10,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:15:10,865 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 12:15:10,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974493023] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:15:10,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1196895181] [2022-12-14 12:15:10,867 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:15:10,867 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:15:10,867 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:15:10,868 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:15:10,868 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:15:10,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:10,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:10,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:10,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:10,955 INFO L321 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2022-12-14 12:15:10,955 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-12-14 12:15:10,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:10,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:10,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:10,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:11,046 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-12-14 12:15:11,046 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-12-14 12:15:11,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:11,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 12:15:11,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:11,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:11,186 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 12:15:11,186 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 378 treesize of output 377 [2022-12-14 12:15:11,322 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 16 treesize of output 12 [2022-12-14 12:15:11,338 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:15:11,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 12:15:11,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:11,356 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:11,396 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 12:15:11,396 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-12-14 12:15:11,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:11,458 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:11,458 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:11,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:11,485 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:11,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:11,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:11,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:11,510 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 12:15:11,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 97 [2022-12-14 12:15:11,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:11,547 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:11,547 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:11,577 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:15:11,577 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 12:15:11,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:11,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:11,619 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 12:15:11,620 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-12-14 12:15:11,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:11,664 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:11,665 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 25 treesize of output 25 [2022-12-14 12:15:11,675 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:15:11,879 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '659#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-12-14 12:15:11,879 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:15:11,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:15:11,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-14 12:15:11,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502584235] [2022-12-14 12:15:11,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:15:11,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 12:15:11,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:15:11,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 12:15:11,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-12-14 12:15:11,881 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:11,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:15:11,912 INFO L93 Difference]: Finished difference Result 52 states and 65 transitions. [2022-12-14 12:15:11,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 12:15:11,912 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 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 24 [2022-12-14 12:15:11,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:15:11,913 INFO L225 Difference]: With dead ends: 52 [2022-12-14 12:15:11,913 INFO L226 Difference]: Without dead ends: 32 [2022-12-14 12:15:11,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-12-14 12:15:11,915 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:15:11,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:15:11,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-12-14 12:15:11,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-12-14 12:15:11,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 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) [2022-12-14 12:15:11,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-12-14 12:15:11,918 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 24 [2022-12-14 12:15:11,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:15:11,919 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-12-14 12:15:11,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:11,919 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-12-14 12:15:11,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-12-14 12:15:11,919 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:15:11,919 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:15:11,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-14 12:15:12,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:12,121 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:15:12,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:15:12,123 INFO L85 PathProgramCache]: Analyzing trace with hash 2118468451, now seen corresponding path program 4 times [2022-12-14 12:15:12,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:15:12,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618754915] [2022-12-14 12:15:12,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:12,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:15:12,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:15:12,406 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 12:15:12,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:15:12,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618754915] [2022-12-14 12:15:12,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618754915] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:15:12,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552977426] [2022-12-14 12:15:12,406 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:15:12,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:12,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:15:12,407 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:15:12,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 12:15:12,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:15:12,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 12:15:12,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:15:12,505 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 12:15:12,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:15:12,625 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 12:15:12,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552977426] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:15:12,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1813674045] [2022-12-14 12:15:12,628 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:15:12,628 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:15:12,628 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:15:12,628 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:15:12,628 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:15:12,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:12,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:12,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:12,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:12,730 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-12-14 12:15:12,730 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-12-14 12:15:12,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:12,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:12,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:12,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:12,749 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2022-12-14 12:15:12,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:12,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 12:15:12,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:12,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:12,873 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 12:15:12,874 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 378 treesize of output 377 [2022-12-14 12:15:12,976 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 16 treesize of output 12 [2022-12-14 12:15:12,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:12,993 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:12,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:13,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:13,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:13,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:13,025 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 12:15:13,025 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 97 [2022-12-14 12:15:13,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:13,050 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:13,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:13,065 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:15:13,065 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 12:15:13,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:13,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:13,110 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 12:15:13,111 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-12-14 12:15:13,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:13,141 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:13,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:13,152 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:13,158 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:13,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:13,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:13,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:13,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:13,186 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 12:15:13,187 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 97 [2022-12-14 12:15:13,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:13,213 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:13,213 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:13,224 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:15:13,346 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1017#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-12-14 12:15:13,346 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:15:13,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:15:13,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-14 12:15:13,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283973648] [2022-12-14 12:15:13,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:15:13,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 12:15:13,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:15:13,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 12:15:13,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-12-14 12:15:13,348 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:13,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:15:13,378 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2022-12-14 12:15:13,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 12:15:13,379 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 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 30 [2022-12-14 12:15:13,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:15:13,379 INFO L225 Difference]: With dead ends: 64 [2022-12-14 12:15:13,379 INFO L226 Difference]: Without dead ends: 44 [2022-12-14 12:15:13,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=320, Invalid=550, Unknown=0, NotChecked=0, Total=870 [2022-12-14 12:15:13,380 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:15:13,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:15:13,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-12-14 12:15:13,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-12-14 12:15:13,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 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) [2022-12-14 12:15:13,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-12-14 12:15:13,386 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 30 [2022-12-14 12:15:13,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:15:13,386 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-12-14 12:15:13,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:13,386 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-12-14 12:15:13,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-12-14 12:15:13,387 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:15:13,387 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:15:13,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 12:15:13,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:13,589 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:15:13,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:15:13,590 INFO L85 PathProgramCache]: Analyzing trace with hash 2005549347, now seen corresponding path program 5 times [2022-12-14 12:15:13,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:15:13,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635467042] [2022-12-14 12:15:13,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:13,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:15:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:15:14,116 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-12-14 12:15:14,116 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:15:14,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635467042] [2022-12-14 12:15:14,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635467042] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:15:14,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659989985] [2022-12-14 12:15:14,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:15:14,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:14,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:15:14,117 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:15:14,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 12:15:14,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 12:15:14,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:15:14,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 12:15:14,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:15:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-12-14 12:15:14,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:15:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-12-14 12:15:14,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659989985] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:15:14,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [544289833] [2022-12-14 12:15:14,321 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:15:14,321 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:15:14,321 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:15:14,321 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:15:14,321 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:15:14,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:14,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:14,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:14,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:14,391 INFO L321 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2022-12-14 12:15:14,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-12-14 12:15:14,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:14,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:14,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:14,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:14,471 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-12-14 12:15:14,472 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-12-14 12:15:14,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:14,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 12:15:14,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:14,564 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:14,580 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 12:15:14,580 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 378 treesize of output 377 [2022-12-14 12:15:14,729 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 16 treesize of output 12 [2022-12-14 12:15:14,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:14,744 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:14,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:14,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:14,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:14,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:14,771 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 12:15:14,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 97 [2022-12-14 12:15:14,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:14,800 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:14,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:14,816 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:15:14,816 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 12:15:14,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:14,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:14,858 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 12:15:14,858 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-12-14 12:15:14,892 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:14,899 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:14,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:14,915 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:15:14,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 12:15:14,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:14,938 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:14,974 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 12:15:14,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-12-14 12:15:15,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:15,018 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:15,018 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:15,030 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:15:15,205 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1505#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-12-14 12:15:15,205 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:15:15,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:15:15,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 7, 7] total 35 [2022-12-14 12:15:15,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954060263] [2022-12-14 12:15:15,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:15:15,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-12-14 12:15:15,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:15:15,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-12-14 12:15:15,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 12:15:15,207 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 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) [2022-12-14 12:15:15,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:15:15,302 INFO L93 Difference]: Finished difference Result 83 states and 109 transitions. [2022-12-14 12:15:15,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-12-14 12:15:15,303 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 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 42 [2022-12-14 12:15:15,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:15:15,303 INFO L225 Difference]: With dead ends: 83 [2022-12-14 12:15:15,304 INFO L226 Difference]: Without dead ends: 63 [2022-12-14 12:15:15,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=385, Invalid=1175, Unknown=0, NotChecked=0, Total=1560 [2022-12-14 12:15:15,305 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:15:15,306 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:15:15,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-12-14 12:15:15,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-12-14 12:15:15,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.0806451612903225) internal successors, (67), 62 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:15,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2022-12-14 12:15:15,310 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 42 [2022-12-14 12:15:15,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:15:15,311 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2022-12-14 12:15:15,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 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) [2022-12-14 12:15:15,311 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2022-12-14 12:15:15,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-12-14 12:15:15,311 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:15:15,311 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:15:15,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 12:15:15,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:15,513 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:15:15,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:15:15,513 INFO L85 PathProgramCache]: Analyzing trace with hash 370675552, now seen corresponding path program 6 times [2022-12-14 12:15:15,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:15:15,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292232088] [2022-12-14 12:15:15,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:15,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:15:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:15:16,022 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-12-14 12:15:16,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:15:16,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292232088] [2022-12-14 12:15:16,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292232088] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:15:16,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684372071] [2022-12-14 12:15:16,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:15:16,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:16,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:15:16,023 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:15:16,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 12:15:16,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:15:16,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:15:16,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 25 conjunts are in the unsatisfiable core [2022-12-14 12:15:16,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:15:16,194 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-12-14 12:15:16,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:15:16,741 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-12-14 12:15:16,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684372071] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:15:16,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1376440729] [2022-12-14 12:15:16,742 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:15:16,742 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:15:16,742 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:15:16,742 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:15:16,743 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:15:16,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:16,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:16,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:16,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:16,830 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-12-14 12:15:16,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-12-14 12:15:16,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:16,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:16,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:16,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:16,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2022-12-14 12:15:16,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:16,864 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 12:15:16,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:16,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:16,935 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 12:15:16,935 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 388 treesize of output 376 [2022-12-14 12:15:16,987 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 16 treesize of output 12 [2022-12-14 12:15:17,004 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:15:17,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 12:15:17,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:17,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:17,047 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 12:15:17,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-12-14 12:15:17,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:17,105 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:17,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:17,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:17,120 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:17,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:17,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:17,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:17,144 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 12:15:17,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 97 [2022-12-14 12:15:17,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:17,171 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:17,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:17,195 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:15:17,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 12:15:17,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:17,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:17,250 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 12:15:17,251 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-12-14 12:15:17,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:17,300 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:17,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:17,310 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:15:17,686 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2199#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-12-14 12:15:17,686 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:15:17,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:15:17,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-12-14 12:15:17,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114291538] [2022-12-14 12:15:17,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:15:17,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 12:15:17,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:15:17,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 12:15:17,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 12:15:17,691 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:17,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:15:17,746 INFO L93 Difference]: Finished difference Result 126 states and 158 transitions. [2022-12-14 12:15:17,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-12-14 12:15:17,747 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2022-12-14 12:15:17,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:15:17,747 INFO L225 Difference]: With dead ends: 126 [2022-12-14 12:15:17,747 INFO L226 Difference]: Without dead ends: 88 [2022-12-14 12:15:17,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 141 SyntacticMatches, 11 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1295, Invalid=1785, Unknown=0, NotChecked=0, Total=3080 [2022-12-14 12:15:17,748 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 12:15:17,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 12:15:17,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-12-14 12:15:17,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-12-14 12:15:17,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 87 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) [2022-12-14 12:15:17,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2022-12-14 12:15:17,753 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 61 [2022-12-14 12:15:17,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:15:17,753 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2022-12-14 12:15:17,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 50 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:17,753 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2022-12-14 12:15:17,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-14 12:15:17,754 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:15:17,754 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:15:17,759 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 12:15:17,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:17,956 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:15:17,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:15:17,957 INFO L85 PathProgramCache]: Analyzing trace with hash 140884771, now seen corresponding path program 7 times [2022-12-14 12:15:17,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:15:17,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124263323] [2022-12-14 12:15:17,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:17,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:15:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:15:19,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1341 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-12-14 12:15:19,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:15:19,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124263323] [2022-12-14 12:15:19,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124263323] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:15:19,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867948018] [2022-12-14 12:15:19,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:15:19,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:19,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:15:19,325 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:15:19,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 12:15:19,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:15:19,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 12:15:19,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:15:19,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1341 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-12-14 12:15:19,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:15:21,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1341 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-12-14 12:15:21,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867948018] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:15:21,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1560586324] [2022-12-14 12:15:21,406 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:15:21,406 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:15:21,406 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:15:21,406 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:15:21,406 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:15:21,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:21,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:21,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:21,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:21,489 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-12-14 12:15:21,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-12-14 12:15:21,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:21,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:21,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:21,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:21,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2022-12-14 12:15:21,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:21,539 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 12:15:21,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:21,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:21,649 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 12:15:21,649 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 378 treesize of output 377 [2022-12-14 12:15:21,783 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 16 treesize of output 12 [2022-12-14 12:15:21,805 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:15:21,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 12:15:21,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:21,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:21,850 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 12:15:21,850 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-12-14 12:15:21,879 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:21,885 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:21,886 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:21,900 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:15:21,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 12:15:21,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:21,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:21,948 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 12:15:21,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-12-14 12:15:21,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:21,986 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:21,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:22,001 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:15:22,001 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 12:15:22,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:22,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:22,062 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 12:15:22,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-12-14 12:15:22,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:22,105 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:22,106 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:22,114 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:15:22,382 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3229#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-12-14 12:15:22,383 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:15:22,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:15:22,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2022-12-14 12:15:22,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621965163] [2022-12-14 12:15:22,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:15:22,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-12-14 12:15:22,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:15:22,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-12-14 12:15:22,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-12-14 12:15:22,388 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 101 states, 101 states have (on average 1.099009900990099) internal successors, (111), 100 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) [2022-12-14 12:15:22,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:15:22,498 INFO L93 Difference]: Finished difference Result 176 states and 233 transitions. [2022-12-14 12:15:22,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-12-14 12:15:22,498 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.099009900990099) internal successors, (111), 100 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) Word has length 86 [2022-12-14 12:15:22,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:15:22,499 INFO L225 Difference]: With dead ends: 176 [2022-12-14 12:15:22,499 INFO L226 Difference]: Without dead ends: 138 [2022-12-14 12:15:22,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=5070, Invalid=6060, Unknown=0, NotChecked=0, Total=11130 [2022-12-14 12:15:22,502 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:15:22,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:15:22,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-12-14 12:15:22,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-12-14 12:15:22,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0364963503649636) internal successors, (142), 137 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:22,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2022-12-14 12:15:22,512 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 86 [2022-12-14 12:15:22,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:15:22,512 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2022-12-14 12:15:22,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.099009900990099) internal successors, (111), 100 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) [2022-12-14 12:15:22,512 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2022-12-14 12:15:22,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 12:15:22,514 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:15:22,514 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:15:22,520 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 12:15:22,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:22,716 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:15:22,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:15:22,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1364372029, now seen corresponding path program 8 times [2022-12-14 12:15:22,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:15:22,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083242859] [2022-12-14 12:15:22,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:22,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:15:22,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:15:27,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-12-14 12:15:27,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:15:27,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083242859] [2022-12-14 12:15:27,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083242859] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:15:27,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387161404] [2022-12-14 12:15:27,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:15:27,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:27,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:15:27,212 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:15:27,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 12:15:28,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-12-14 12:15:28,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:15:28,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 12:15:28,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:15:29,256 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4961 trivial. 0 not checked. [2022-12-14 12:15:29,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:15:29,672 INFO L134 CoverageAnalysis]: Checked inductivity of 5016 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 4961 trivial. 0 not checked. [2022-12-14 12:15:29,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387161404] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:15:29,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1547246931] [2022-12-14 12:15:29,673 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:15:29,673 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:15:29,673 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:15:29,674 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:15:29,674 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:15:29,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:29,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:29,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:29,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:29,750 INFO L321 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2022-12-14 12:15:29,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-12-14 12:15:29,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:29,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:29,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:29,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:29,821 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-12-14 12:15:29,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-12-14 12:15:29,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:29,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 12:15:29,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:29,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:29,992 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 12:15:29,992 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 388 treesize of output 376 [2022-12-14 12:15:30,080 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 16 treesize of output 12 [2022-12-14 12:15:30,098 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:15:30,099 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 12:15:30,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:30,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:30,150 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 12:15:30,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-12-14 12:15:30,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:30,180 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:30,181 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:30,194 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:15:30,194 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 12:15:30,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:30,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:30,248 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 12:15:30,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-12-14 12:15:30,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:30,308 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:30,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:30,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:30,323 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:30,323 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:30,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:30,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:30,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:30,347 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 12:15:30,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 97 [2022-12-14 12:15:30,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:30,369 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:30,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:30,378 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:15:30,743 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4781#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-12-14 12:15:30,743 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:15:30,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:15:30,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 13, 13] total 123 [2022-12-14 12:15:30,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159461939] [2022-12-14 12:15:30,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:15:30,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-12-14 12:15:30,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:15:30,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-12-14 12:15:30,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-12-14 12:15:30,751 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand has 123 states, 123 states have (on average 1.113821138211382) internal successors, (137), 123 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:30,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:15:30,968 INFO L93 Difference]: Finished difference Result 213 states and 257 transitions. [2022-12-14 12:15:30,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-12-14 12:15:30,969 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.113821138211382) internal successors, (137), 123 states have internal predecessors, (137), 0 states have call successors, (0), 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 136 [2022-12-14 12:15:30,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:15:30,970 INFO L225 Difference]: With dead ends: 213 [2022-12-14 12:15:30,970 INFO L226 Difference]: Without dead ends: 175 [2022-12-14 12:15:30,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 380 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2801 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5345, Invalid=10911, Unknown=0, NotChecked=0, Total=16256 [2022-12-14 12:15:30,976 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:15:30,976 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:15:30,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-12-14 12:15:30,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-12-14 12:15:30,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.028735632183908) internal successors, (179), 174 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) [2022-12-14 12:15:30,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 179 transitions. [2022-12-14 12:15:30,983 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 179 transitions. Word has length 136 [2022-12-14 12:15:30,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:15:30,984 INFO L495 AbstractCegarLoop]: Abstraction has 175 states and 179 transitions. [2022-12-14 12:15:30,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.113821138211382) internal successors, (137), 123 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:30,984 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 179 transitions. [2022-12-14 12:15:30,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-12-14 12:15:30,985 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:15:30,985 INFO L195 NwaCegarLoop]: trace histogram [99, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:15:30,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 12:15:31,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 12:15:31,187 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:15:31,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:15:31,188 INFO L85 PathProgramCache]: Analyzing trace with hash -341882656, now seen corresponding path program 9 times [2022-12-14 12:15:31,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:15:31,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467794070] [2022-12-14 12:15:31,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:31,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:15:31,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:15:35,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5709 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-12-14 12:15:35,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:15:35,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467794070] [2022-12-14 12:15:35,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467794070] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:15:35,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712690390] [2022-12-14 12:15:35,755 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:15:35,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:15:35,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:15:35,756 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:15:35,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 12:15:36,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:15:36,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:15:36,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 1454 conjuncts, 101 conjunts are in the unsatisfiable core [2022-12-14 12:15:36,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:15:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5709 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-12-14 12:15:36,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:15:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5709 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-12-14 12:15:43,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712690390] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:15:43,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1383787348] [2022-12-14 12:15:43,468 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:15:43,468 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:15:43,468 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:15:43,469 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:15:43,469 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:15:43,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:43,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:43,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:43,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:43,545 INFO L321 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2022-12-14 12:15:43,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-12-14 12:15:43,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:43,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:43,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:43,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:43,631 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-12-14 12:15:43,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-12-14 12:15:43,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:43,670 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 12:15:43,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:43,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:15:43,805 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 12:15:43,805 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 388 treesize of output 376 [2022-12-14 12:15:43,857 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 16 treesize of output 12 [2022-12-14 12:15:43,874 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:15:43,874 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 12:15:43,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:43,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:43,932 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 12:15:43,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-12-14 12:15:43,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:43,987 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:43,987 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:44,003 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:15:44,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 12:15:44,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:44,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:44,053 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 12:15:44,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-12-14 12:15:44,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:44,089 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:44,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:44,105 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:15:44,105 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 12:15:44,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:44,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:44,153 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 12:15:44,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-12-14 12:15:44,191 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:15:44,198 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:15:44,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:15:44,206 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:15:44,586 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6783#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-12-14 12:15:44,586 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:15:44,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:15:44,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-12-14 12:15:44,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097322445] [2022-12-14 12:15:44,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:15:44,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-12-14 12:15:44,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:15:44,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-12-14 12:15:44,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-12-14 12:15:44,595 INFO L87 Difference]: Start difference. First operand 175 states and 179 transitions. Second operand has 203 states, 203 states have (on average 1.0492610837438423) internal successors, (213), 202 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:44,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:15:44,934 INFO L93 Difference]: Finished difference Result 350 states and 458 transitions. [2022-12-14 12:15:44,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2022-12-14 12:15:44,935 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0492610837438423) internal successors, (213), 202 states have internal predecessors, (213), 0 states have call successors, (0), 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 173 [2022-12-14 12:15:44,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:15:44,935 INFO L225 Difference]: With dead ends: 350 [2022-12-14 12:15:44,935 INFO L226 Difference]: Without dead ends: 276 [2022-12-14 12:15:44,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 618 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=20523, Invalid=22533, Unknown=0, NotChecked=0, Total=43056 [2022-12-14 12:15:44,938 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 12:15:44,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 12:15:44,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-12-14 12:15:44,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 276. [2022-12-14 12:15:44,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 1.018181818181818) internal successors, (280), 275 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:44,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 280 transitions. [2022-12-14 12:15:44,947 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 280 transitions. Word has length 173 [2022-12-14 12:15:44,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:15:44,947 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 280 transitions. [2022-12-14 12:15:44,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0492610837438423) internal successors, (213), 202 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:15:44,948 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 280 transitions. [2022-12-14 12:15:44,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-12-14 12:15:44,950 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:15:44,950 INFO L195 NwaCegarLoop]: trace histogram [200, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:15:44,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 12:15:45,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 12:15:45,151 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:15:45,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:15:45,153 INFO L85 PathProgramCache]: Analyzing trace with hash -14099357, now seen corresponding path program 10 times [2022-12-14 12:15:45,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:15:45,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001411358] [2022-12-14 12:15:45,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:15:45,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:15:45,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:16:03,329 INFO L134 CoverageAnalysis]: Checked inductivity of 20859 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-12-14 12:16:03,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:16:03,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001411358] [2022-12-14 12:16:03,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001411358] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:16:03,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166366740] [2022-12-14 12:16:03,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 12:16:03,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:16:03,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:16:03,331 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:16:03,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 12:16:03,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:16:03,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 2363 conjuncts, 202 conjunts are in the unsatisfiable core [2022-12-14 12:16:03,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:16:03,916 INFO L134 CoverageAnalysis]: Checked inductivity of 20859 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-12-14 12:16:03,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:16:31,836 INFO L134 CoverageAnalysis]: Checked inductivity of 20859 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-12-14 12:16:31,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166366740] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:16:31,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1561849364] [2022-12-14 12:16:31,838 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:16:31,838 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:16:31,838 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:16:31,838 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:16:31,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:16:31,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:16:31,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:16:31,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:16:31,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:16:31,894 INFO L321 Elim1Store]: treesize reduction 151, result has 18.4 percent of original size [2022-12-14 12:16:31,895 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 9 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 50 [2022-12-14 12:16:31,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:16:31,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:16:31,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:16:31,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:16:31,982 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-12-14 12:16:31,982 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-12-14 12:16:32,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:16:32,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 12:16:32,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:16:32,070 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:16:32,085 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 12:16:32,085 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 378 treesize of output 377 [2022-12-14 12:16:32,195 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 16 treesize of output 12 [2022-12-14 12:16:32,211 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:16:32,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 12:16:32,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:16:32,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:16:32,265 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 12:16:32,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-12-14 12:16:32,296 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:16:32,301 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:16:32,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:16:32,315 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:16:32,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 12:16:32,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:16:32,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:16:32,366 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 12:16:32,366 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-12-14 12:16:32,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:16:32,402 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:16:32,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:16:32,416 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:16:32,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 12:16:32,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:16:32,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:16:32,456 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 12:16:32,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-12-14 12:16:32,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:16:32,491 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:16:32,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:16:32,501 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:16:33,039 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10069#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-12-14 12:16:33,039 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:16:33,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:16:33,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [202, 202, 202] total 404 [2022-12-14 12:16:33,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214916455] [2022-12-14 12:16:33,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:16:33,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2022-12-14 12:16:33,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:16:33,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2022-12-14 12:16:33,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-12-14 12:16:33,056 INFO L87 Difference]: Start difference. First operand 276 states and 280 transitions. Second operand has 405 states, 405 states have (on average 1.0246913580246915) internal successors, (415), 404 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:16:34,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:16:34,940 INFO L93 Difference]: Finished difference Result 552 states and 761 transitions. [2022-12-14 12:16:34,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2022-12-14 12:16:34,941 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 1.0246913580246915) internal successors, (415), 404 states have internal predecessors, (415), 0 states have call successors, (0), 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 274 [2022-12-14 12:16:34,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:16:34,943 INFO L225 Difference]: With dead ends: 552 [2022-12-14 12:16:34,944 INFO L226 Difference]: Without dead ends: 478 [2022-12-14 12:16:34,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1022 GetRequests, 614 SyntacticMatches, 0 SemanticMatches, 408 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3815 ImplicationChecksByTransitivity, 38.8s TimeCoverageRelationStatistics Valid=81830, Invalid=85860, Unknown=0, NotChecked=0, Total=167690 [2022-12-14 12:16:34,950 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 12:16:34,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 12:16:34,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2022-12-14 12:16:34,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 478. [2022-12-14 12:16:34,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 1.0104821802935011) internal successors, (482), 477 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:16:34,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 482 transitions. [2022-12-14 12:16:34,962 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 482 transitions. Word has length 274 [2022-12-14 12:16:34,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:16:34,963 INFO L495 AbstractCegarLoop]: Abstraction has 478 states and 482 transitions. [2022-12-14 12:16:34,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 1.0246913580246915) internal successors, (415), 404 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:16:34,963 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 482 transitions. [2022-12-14 12:16:34,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2022-12-14 12:16:34,968 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:16:34,968 INFO L195 NwaCegarLoop]: trace histogram [402, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:16:34,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 12:16:35,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:16:35,169 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:16:35,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:16:35,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1370122883, now seen corresponding path program 11 times [2022-12-14 12:16:35,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:16:35,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274098709] [2022-12-14 12:16:35,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:16:35,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:16:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:17:49,288 INFO L134 CoverageAnalysis]: Checked inductivity of 81762 backedges. 0 proven. 81003 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-12-14 12:17:49,288 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:17:49,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274098709] [2022-12-14 12:17:49,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274098709] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:17:49,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105939806] [2022-12-14 12:17:49,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 12:17:49,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:17:49,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:17:49,290 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:17:49,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 12:18:26,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-12-14 12:18:26,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:18:26,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 39 conjunts are in the unsatisfiable core [2022-12-14 12:18:26,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:18:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 81762 backedges. 402 proven. 253 refuted. 0 times theorem prover too weak. 81107 trivial. 0 not checked. [2022-12-14 12:18:29,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:18:32,184 INFO L134 CoverageAnalysis]: Checked inductivity of 81762 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 81509 trivial. 0 not checked. [2022-12-14 12:18:32,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105939806] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:18:32,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1306504334] [2022-12-14 12:18:32,186 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:18:32,186 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:18:32,187 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:18:32,187 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:18:32,187 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:18:32,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:18:32,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:18:32,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:18:32,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:18:32,267 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-12-14 12:18:32,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-12-14 12:18:32,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:18:32,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:18:32,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:18:32,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:18:32,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2022-12-14 12:18:32,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:18:32,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 12:18:32,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:18:32,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:18:32,396 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 12:18:32,397 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 388 treesize of output 376 [2022-12-14 12:18:32,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 12:18:32,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:18:32,459 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:18:32,459 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:18:32,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:18:32,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:18:32,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:18:32,485 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 12:18:32,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 97 [2022-12-14 12:18:32,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:18:32,505 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:18:32,506 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:18:32,518 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:18:32,518 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 12:18:32,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:18:32,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:18:32,565 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 12:18:32,565 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-12-14 12:18:32,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:18:32,594 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:18:32,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:18:32,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:18:32,611 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:18:32,611 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:18:32,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:18:32,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:18:32,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:18:32,637 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 12:18:32,637 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 97 [2022-12-14 12:18:32,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:18:32,660 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:18:32,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:18:32,668 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:18:33,787 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15422#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-12-14 12:18:33,787 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:18:33,787 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:18:33,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [404, 26, 25] total 452 [2022-12-14 12:18:33,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242200942] [2022-12-14 12:18:33,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:18:33,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 452 states [2022-12-14 12:18:33,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:18:33,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 452 interpolants. [2022-12-14 12:18:33,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83362, Invalid=125030, Unknown=0, NotChecked=0, Total=208392 [2022-12-14 12:18:33,806 INFO L87 Difference]: Start difference. First operand 478 states and 482 transitions. Second operand has 452 states, 452 states have (on average 1.0331858407079646) internal successors, (467), 452 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:18:41,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:18:41,877 INFO L93 Difference]: Finished difference Result 625 states and 705 transitions. [2022-12-14 12:18:41,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 452 states. [2022-12-14 12:18:41,877 INFO L78 Accepts]: Start accepts. Automaton has has 452 states, 452 states have (on average 1.0331858407079646) internal successors, (467), 452 states have internal predecessors, (467), 0 states have call successors, (0), 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 476 [2022-12-14 12:18:41,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:18:41,879 INFO L225 Difference]: With dead ends: 625 [2022-12-14 12:18:41,879 INFO L226 Difference]: Without dead ends: 551 [2022-12-14 12:18:41,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1922 GetRequests, 1421 SyntacticMatches, 0 SemanticMatches, 501 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22292 ImplicationChecksByTransitivity, 51.5s TimeCoverageRelationStatistics Valid=85616, Invalid=166890, Unknown=0, NotChecked=0, Total=252506 [2022-12-14 12:18:41,891 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 150 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 12:18:41,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 44 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 12:18:41,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-12-14 12:18:41,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 551. [2022-12-14 12:18:41,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 550 states have (on average 1.009090909090909) internal successors, (555), 550 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:18:41,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 555 transitions. [2022-12-14 12:18:41,906 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 555 transitions. Word has length 476 [2022-12-14 12:18:41,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:18:41,907 INFO L495 AbstractCegarLoop]: Abstraction has 551 states and 555 transitions. [2022-12-14 12:18:41,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 452 states, 452 states have (on average 1.0331858407079646) internal successors, (467), 452 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:18:41,907 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 555 transitions. [2022-12-14 12:18:41,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2022-12-14 12:18:41,914 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:18:41,914 INFO L195 NwaCegarLoop]: trace histogram [403, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:18:41,929 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 12:18:42,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:18:42,115 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:18:42,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:18:42,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1227421600, now seen corresponding path program 12 times [2022-12-14 12:18:42,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:18:42,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940773093] [2022-12-14 12:18:42,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:18:42,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:18:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 12:19:56,795 INFO L134 CoverageAnalysis]: Checked inductivity of 84649 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2022-12-14 12:19:56,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 12:19:56,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940773093] [2022-12-14 12:19:56,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940773093] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 12:19:56,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926406910] [2022-12-14 12:19:56,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 12:19:56,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 12:19:56,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 12:19:56,797 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 12:19:56,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 12:19:57,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 12:19:57,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 12:19:57,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 4694 conjuncts, 405 conjunts are in the unsatisfiable core [2022-12-14 12:19:57,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 12:19:58,038 INFO L134 CoverageAnalysis]: Checked inductivity of 84649 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2022-12-14 12:19:58,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 12:21:55,948 INFO L134 CoverageAnalysis]: Checked inductivity of 84649 backedges. 0 proven. 81406 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2022-12-14 12:21:55,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926406910] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 12:21:55,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1617952305] [2022-12-14 12:21:55,950 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 12:21:55,950 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 12:21:55,950 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 12:21:55,950 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 12:21:55,950 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 12:21:55,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:21:55,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:21:55,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:21:55,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:21:56,033 INFO L321 Elim1Store]: treesize reduction 228, result has 14.0 percent of original size [2022-12-14 12:21:56,033 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 75 treesize of output 97 [2022-12-14 12:21:56,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:21:56,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:21:56,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:21:56,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:21:56,047 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 19 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 37 [2022-12-14 12:21:56,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:21:56,066 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 12:21:56,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:21:56,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:56,146 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 12:21:56,147 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 378 treesize of output 377 [2022-12-14 12:21:56,244 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 16 treesize of output 12 [2022-12-14 12:21:56,252 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:56,257 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:21:56,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:21:56,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 12:21:56,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:56,273 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:56,279 INFO L321 Elim1Store]: treesize reduction 30, result has 28.6 percent of original size [2022-12-14 12:21:56,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 97 [2022-12-14 12:21:56,294 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:56,300 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:21:56,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:21:56,312 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:21:56,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 12:21:56,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:56,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:56,363 INFO L321 Elim1Store]: treesize reduction 99, result has 29.3 percent of original size [2022-12-14 12:21:56,363 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 101 [2022-12-14 12:21:56,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:56,398 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:21:56,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:21:56,415 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-12-14 12:21:56,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2022-12-14 12:21:56,435 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:56,436 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:56,469 INFO L321 Elim1Store]: treesize reduction 89, result has 36.4 percent of original size [2022-12-14 12:21:56,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 111 [2022-12-14 12:21:56,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 12:21:56,521 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-12-14 12:21:56,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-12-14 12:21:56,532 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 12:21:57,674 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22002#(and (<= 0 |ULTIMATE.start_main_~#a4~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a1~0#1.base|) (<= 100000 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~#a3~0#1.offset| 0) (= (ite (= |ULTIMATE.start_main_#t~mem10#1| |ULTIMATE.start_main_#t~mem11#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= 100000 |ULTIMATE.start_main_~a~0#1|) (= |ULTIMATE.start_main_~#a1~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~#a2~0#1.base|) (<= 0 |ULTIMATE.start_main_~#a3~0#1.base|) (= |ULTIMATE.start_main_~#a2~0#1.offset| 0) (= (select (select |#memory_int| |ULTIMATE.start_main_~#a4~0#1.base|) (+ |ULTIMATE.start_main_~#a4~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4))) |ULTIMATE.start_main_#t~mem11#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~#a4~0#1.offset| 0) (= |ULTIMATE.start_main_~x~0#1| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0) (= |ULTIMATE.start_main_#t~mem10#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a1~0#1.base|) (+ |ULTIMATE.start_main_~#a1~0#1.offset| (* |ULTIMATE.start_main_~x~0#1| 4)))))' at error location [2022-12-14 12:21:57,674 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 12:21:57,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 12:21:57,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 405, 405] total 810 [2022-12-14 12:21:57,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72788474] [2022-12-14 12:21:57,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 12:21:57,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 811 states [2022-12-14 12:21:57,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 12:21:57,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 811 interpolants. [2022-12-14 12:21:57,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328475, Invalid=336565, Unknown=0, NotChecked=0, Total=665040 [2022-12-14 12:21:57,761 INFO L87 Difference]: Start difference. First operand 551 states and 555 transitions. Second operand has 811 states, 811 states have (on average 1.0123304562268804) internal successors, (821), 810 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:22:11,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 12:22:11,949 INFO L93 Difference]: Finished difference Result 1102 states and 1514 transitions. [2022-12-14 12:22:11,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 810 states. [2022-12-14 12:22:11,950 INFO L78 Accepts]: Start accepts. Automaton has has 811 states, 811 states have (on average 1.0123304562268804) internal successors, (821), 810 states have internal predecessors, (821), 0 states have call successors, (0), 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 549 [2022-12-14 12:22:11,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 12:22:11,952 INFO L225 Difference]: With dead ends: 1102 [2022-12-14 12:22:11,952 INFO L226 Difference]: Without dead ends: 956 [2022-12-14 12:22:11,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2050 GetRequests, 1236 SyntacticMatches, 0 SemanticMatches, 814 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7672 ImplicationChecksByTransitivity, 153.5s TimeCoverageRelationStatistics Valid=328475, Invalid=336565, Unknown=0, NotChecked=0, Total=665040 [2022-12-14 12:22:11,979 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-12-14 12:22:11,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-12-14 12:22:11,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2022-12-14 12:22:12,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 956. [2022-12-14 12:22:12,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 955 states have (on average 1.0052356020942408) internal successors, (960), 955 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:22:12,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 960 transitions. [2022-12-14 12:22:12,004 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 960 transitions. Word has length 549 [2022-12-14 12:22:12,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 12:22:12,004 INFO L495 AbstractCegarLoop]: Abstraction has 956 states and 960 transitions. [2022-12-14 12:22:12,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 811 states, 811 states have (on average 1.0123304562268804) internal successors, (821), 810 states have internal predecessors, (821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 12:22:12,005 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 960 transitions. [2022-12-14 12:22:12,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 955 [2022-12-14 12:22:12,010 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 12:22:12,010 INFO L195 NwaCegarLoop]: trace histogram [808, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 12:22:12,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-12-14 12:22:12,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf65f0dd-228e-4852-bf07-0cd84f660fa3/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-14 12:22:12,211 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 12:22:12,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 12:22:12,212 INFO L85 PathProgramCache]: Analyzing trace with hash -791558685, now seen corresponding path program 13 times [2022-12-14 12:22:12,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 12:22:12,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525001572] [2022-12-14 12:22:12,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 12:22:12,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 12:22:15,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat