./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_partition_original_ground.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_partition_original_ground.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta --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 7c423fd522e95226e38270ab4d82928946afe4ab8940cfd611684a61e552aff6 --- 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-dbf71c6-m [2022-10-17 17:23:36,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 17:23:36,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 17:23:36,039 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 17:23:36,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 17:23:36,041 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 17:23:36,043 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 17:23:36,045 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 17:23:36,048 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 17:23:36,049 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 17:23:36,050 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 17:23:36,052 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 17:23:36,053 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 17:23:36,054 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 17:23:36,056 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 17:23:36,058 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 17:23:36,059 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 17:23:36,060 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 17:23:36,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 17:23:36,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 17:23:36,068 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 17:23:36,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 17:23:36,072 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 17:23:36,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 17:23:36,078 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 17:23:36,079 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 17:23:36,080 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 17:23:36,081 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 17:23:36,081 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 17:23:36,083 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 17:23:36,083 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 17:23:36,084 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 17:23:36,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 17:23:36,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 17:23:36,088 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 17:23:36,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 17:23:36,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 17:23:36,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 17:23:36,091 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 17:23:36,092 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 17:23:36,093 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 17:23:36,094 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-10-17 17:23:36,120 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 17:23:36,124 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 17:23:36,124 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 17:23:36,124 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 17:23:36,125 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 17:23:36,126 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 17:23:36,126 INFO L138 SettingsManager]: * User list type=DISABLED [2022-10-17 17:23:36,126 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-10-17 17:23:36,127 INFO L138 SettingsManager]: * Explicit value domain=true [2022-10-17 17:23:36,127 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-10-17 17:23:36,128 INFO L138 SettingsManager]: * Octagon Domain=false [2022-10-17 17:23:36,128 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-10-17 17:23:36,128 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-10-17 17:23:36,129 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-10-17 17:23:36,129 INFO L138 SettingsManager]: * Interval Domain=false [2022-10-17 17:23:36,129 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-10-17 17:23:36,129 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-10-17 17:23:36,130 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-10-17 17:23:36,130 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 17:23:36,131 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 17:23:36,131 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 17:23:36,131 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 17:23:36,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 17:23:36,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 17:23:36,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 17:23:36,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 17:23:36,134 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 17:23:36,134 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 17:23:36,134 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 17:23:36,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 17:23:36,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 17:23:36,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 17:23:36,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:23:36,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 17:23:36,136 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-10-17 17:23:36,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 17:23:36,136 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 17:23:36,136 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-10-17 17:23:36,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 17:23:36,137 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 17:23:36,138 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-10-17 17:23:36,138 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_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7c423fd522e95226e38270ab4d82928946afe4ab8940cfd611684a61e552aff6 [2022-10-17 17:23:36,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 17:23:36,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 17:23:36,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 17:23:36,484 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 17:23:36,485 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 17:23:36,486 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/../../sv-benchmarks/c/array-examples/standard_partition_original_ground.i [2022-10-17 17:23:36,551 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/data/07edfdd0f/2e7ea998e2ff476a83a839dbc7c75960/FLAG2f916bfa1 [2022-10-17 17:23:37,011 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 17:23:37,011 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/sv-benchmarks/c/array-examples/standard_partition_original_ground.i [2022-10-17 17:23:37,016 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/data/07edfdd0f/2e7ea998e2ff476a83a839dbc7c75960/FLAG2f916bfa1 [2022-10-17 17:23:37,362 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/data/07edfdd0f/2e7ea998e2ff476a83a839dbc7c75960 [2022-10-17 17:23:37,367 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 17:23:37,369 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 17:23:37,379 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 17:23:37,380 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 17:23:37,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 17:23:37,396 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:23:37" (1/1) ... [2022-10-17 17:23:37,398 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ea4c731 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:37, skipping insertion in model container [2022-10-17 17:23:37,399 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 05:23:37" (1/1) ... [2022-10-17 17:23:37,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 17:23:37,444 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 17:23:37,644 WARN L230 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_914d13c1-93c2-46a8-9b7e-9eef5891ac24/sv-benchmarks/c/array-examples/standard_partition_original_ground.i[827,840] [2022-10-17 17:23:37,678 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:23:37,690 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 17:23:37,709 WARN L230 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_914d13c1-93c2-46a8-9b7e-9eef5891ac24/sv-benchmarks/c/array-examples/standard_partition_original_ground.i[827,840] [2022-10-17 17:23:37,739 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 17:23:37,753 INFO L208 MainTranslator]: Completed translation [2022-10-17 17:23:37,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:37 WrapperNode [2022-10-17 17:23:37,754 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 17:23:37,755 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 17:23:37,756 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 17:23:37,756 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 17:23:37,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:37" (1/1) ... [2022-10-17 17:23:37,781 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:37" (1/1) ... [2022-10-17 17:23:37,809 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2022-10-17 17:23:37,809 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 17:23:37,811 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 17:23:37,811 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 17:23:37,811 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 17:23:37,821 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:37" (1/1) ... [2022-10-17 17:23:37,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:37" (1/1) ... [2022-10-17 17:23:37,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:37" (1/1) ... [2022-10-17 17:23:37,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:37" (1/1) ... [2022-10-17 17:23:37,844 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:37" (1/1) ... [2022-10-17 17:23:37,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:37" (1/1) ... [2022-10-17 17:23:37,859 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:37" (1/1) ... [2022-10-17 17:23:37,863 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:37" (1/1) ... [2022-10-17 17:23:37,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 17:23:37,866 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 17:23:37,866 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 17:23:37,866 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 17:23:37,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:37" (1/1) ... [2022-10-17 17:23:37,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 17:23:37,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:23:37,912 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 17:23:37,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 17:23:37,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 17:23:37,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 17:23:37,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 17:23:37,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 17:23:37,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 17:23:37,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 17:23:37,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-10-17 17:23:37,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-10-17 17:23:37,972 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-10-17 17:23:37,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 17:23:38,045 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 17:23:38,047 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 17:23:38,215 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 17:23:38,277 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 17:23:38,277 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-10-17 17:23:38,280 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:23:38 BoogieIcfgContainer [2022-10-17 17:23:38,280 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 17:23:38,283 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 17:23:38,283 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 17:23:38,286 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 17:23:38,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 05:23:37" (1/3) ... [2022-10-17 17:23:38,287 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46696a73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:23:38, skipping insertion in model container [2022-10-17 17:23:38,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 05:23:37" (2/3) ... [2022-10-17 17:23:38,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46696a73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 05:23:38, skipping insertion in model container [2022-10-17 17:23:38,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 05:23:38" (3/3) ... [2022-10-17 17:23:38,290 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_partition_original_ground.i [2022-10-17 17:23:38,314 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 17:23:38,315 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 17:23:38,365 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 17:23:38,382 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;@1466330c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 17:23:38,394 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-10-17 17:23:38,399 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:23:38,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-10-17 17:23:38,408 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:38,423 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:38,424 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:38,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:38,429 INFO L85 PathProgramCache]: Analyzing trace with hash 835345387, now seen corresponding path program 1 times [2022-10-17 17:23:38,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:38,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924386842] [2022-10-17 17:23:38,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:38,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:38,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:38,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:38,697 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:38,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924386842] [2022-10-17 17:23:38,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924386842] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:38,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 17:23:38,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-10-17 17:23:38,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618031725] [2022-10-17 17:23:38,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:38,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:23:38,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:38,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:23:38,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 17:23:38,736 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:38,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:38,805 INFO L93 Difference]: Finished difference Result 31 states and 43 transitions. [2022-10-17 17:23:38,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:23:38,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-10-17 17:23:38,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:38,815 INFO L225 Difference]: With dead ends: 31 [2022-10-17 17:23:38,816 INFO L226 Difference]: Without dead ends: 16 [2022-10-17 17:23:38,826 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 [2022-10-17 17:23:38,830 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:38,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:23:38,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-10-17 17:23:38,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-10-17 17:23:38,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:23:38,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2022-10-17 17:23:38,888 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 8 [2022-10-17 17:23:38,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:38,888 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2022-10-17 17:23:38,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:38,889 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2022-10-17 17:23:38,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-10-17 17:23:38,889 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:38,890 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:38,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 17:23:38,890 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:38,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:38,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1181537117, now seen corresponding path program 1 times [2022-10-17 17:23:38,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:38,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112882567] [2022-10-17 17:23:38,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:38,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:38,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 17:23:39,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:39,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112882567] [2022-10-17 17:23:39,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112882567] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:23:39,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605024593] [2022-10-17 17:23:39,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:39,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:23:39,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:23:39,010 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:23:39,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-10-17 17:23:39,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:39,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2022-10-17 17:23:39,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:23:39,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:23:39,112 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-10-17 17:23:39,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605024593] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 17:23:39,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-10-17 17:23:39,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-10-17 17:23:39,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470260200] [2022-10-17 17:23:39,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 17:23:39,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 17:23:39,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:39,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 17:23:39,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 17:23:39,117 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:39,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:39,140 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2022-10-17 17:23:39,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 17:23:39,141 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-10-17 17:23:39,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:39,141 INFO L225 Difference]: With dead ends: 29 [2022-10-17 17:23:39,142 INFO L226 Difference]: Without dead ends: 17 [2022-10-17 17:23:39,142 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 [2022-10-17 17:23:39,144 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:39,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:23:39,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-10-17 17:23:39,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-10-17 17:23:39,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:23:39,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2022-10-17 17:23:39,151 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 9 [2022-10-17 17:23:39,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:39,151 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2022-10-17 17:23:39,151 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:39,151 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2022-10-17 17:23:39,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-10-17 17:23:39,152 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:39,152 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:39,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-10-17 17:23:39,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:23:39,353 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:39,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:39,354 INFO L85 PathProgramCache]: Analyzing trace with hash 15951130, now seen corresponding path program 1 times [2022-10-17 17:23:39,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:39,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247454505] [2022-10-17 17:23:39,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:39,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:23:39,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:39,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247454505] [2022-10-17 17:23:39,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247454505] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:23:39,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390891008] [2022-10-17 17:23:39,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:39,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:23:39,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:23:39,530 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:23:39,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-10-17 17:23:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:39,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:23:39,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:23:39,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:23:39,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:23:39,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-10-17 17:23:39,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390891008] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:23:39,653 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1234759898] [2022-10-17 17:23:39,674 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-10-17 17:23:39,675 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:23:39,679 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:23:39,685 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:23:39,685 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:23:39,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:39,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:39,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:39,845 INFO L356 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-10-17 17:23:39,846 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-10-17 17:23:39,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:39,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:39,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:40,008 INFO L356 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-10-17 17:23:40,011 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-10-17 17:23:40,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:40,118 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 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 [2022-10-17 17:23:40,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:40,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:23:40,491 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-10-17 17:23:40,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 324 treesize of output 323 [2022-10-17 17:23:40,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:23:40,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:23:40,888 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:23:40,889 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 24 [2022-10-17 17:23:40,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:23:40,914 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:23:40,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2022-10-17 17:23:41,049 INFO L356 Elim1Store]: treesize reduction 94, result has 21.0 percent of original size [2022-10-17 17:23:41,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 98 treesize of output 98 [2022-10-17 17:23:41,298 INFO L356 Elim1Store]: treesize reduction 39, result has 35.0 percent of original size [2022-10-17 17:23:41,299 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 88 treesize of output 85 [2022-10-17 17:23:41,316 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-10-17 17:23:41,341 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-10-17 17:23:41,341 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 31 [2022-10-17 17:23:41,366 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 17:23:41,369 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 53 [2022-10-17 17:23:41,510 INFO L356 Elim1Store]: treesize reduction 94, result has 21.0 percent of original size [2022-10-17 17:23:41,514 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 98 treesize of output 98 [2022-10-17 17:23:41,621 INFO L356 Elim1Store]: treesize reduction 39, result has 35.0 percent of original size [2022-10-17 17:23:41,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 88 treesize of output 85 [2022-10-17 17:23:41,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-10-17 17:23:41,652 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-10-17 17:23:41,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 31 [2022-10-17 17:23:41,672 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 17:23:41,673 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 53 [2022-10-17 17:23:41,707 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2022-10-17 17:23:41,729 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:23:42,016 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '250#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (exists ((|v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_1| Int)) (and (= (ite (<= 0 (select (select |#memory_int| |v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_1|) 0)) 1 0) |__VERIFIER_assert_#in~cond|) (<= 0 |v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_1|))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-10-17 17:23:42,017 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:23:42,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:23:42,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-10-17 17:23:42,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342032623] [2022-10-17 17:23:42,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:23:42,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:23:42,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:42,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:23:42,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-10-17 17:23:42,019 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:42,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:42,073 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2022-10-17 17:23:42,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:23:42,074 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-10-17 17:23:42,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:42,076 INFO L225 Difference]: With dead ends: 34 [2022-10-17 17:23:42,076 INFO L226 Difference]: Without dead ends: 20 [2022-10-17 17:23:42,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-10-17 17:23:42,081 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:42,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:23:42,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-10-17 17:23:42,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-10-17 17:23:42,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:23:42,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-10-17 17:23:42,096 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 10 [2022-10-17 17:23:42,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:42,099 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-10-17 17:23:42,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:42,100 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-10-17 17:23:42,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-10-17 17:23:42,102 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:42,102 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:42,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-10-17 17:23:42,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:23:42,327 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:42,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:42,328 INFO L85 PathProgramCache]: Analyzing trace with hash -52072238, now seen corresponding path program 2 times [2022-10-17 17:23:42,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:42,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071071219] [2022-10-17 17:23:42,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:42,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:42,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-17 17:23:42,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:42,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071071219] [2022-10-17 17:23:42,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071071219] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:23:42,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000064439] [2022-10-17 17:23:42,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 17:23:42,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:23:42,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:23:42,434 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:23:42,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-10-17 17:23:42,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-10-17 17:23:42,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:23:42,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2022-10-17 17:23:42,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:23:42,545 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-17 17:23:42,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:23:42,570 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-17 17:23:42,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000064439] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:23:42,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1870615822] [2022-10-17 17:23:42,584 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-10-17 17:23:42,584 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:23:42,585 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:23:42,585 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:23:42,586 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:23:42,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:42,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:42,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:42,668 INFO L356 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2022-10-17 17:23:42,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 42 [2022-10-17 17:23:42,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:42,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:42,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:42,776 INFO L356 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-10-17 17:23:42,776 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-10-17 17:23:42,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:42,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 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 [2022-10-17 17:23:42,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:42,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:23:42,992 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-10-17 17:23:42,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 324 treesize of output 323 [2022-10-17 17:23:43,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:23:43,225 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-10-17 17:23:43,226 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-10-17 17:23:43,246 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-10-17 17:23:43,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-10-17 17:23:43,332 INFO L356 Elim1Store]: treesize reduction 94, result has 21.0 percent of original size [2022-10-17 17:23:43,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 98 treesize of output 98 [2022-10-17 17:23:43,476 INFO L356 Elim1Store]: treesize reduction 39, result has 35.0 percent of original size [2022-10-17 17:23:43,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 55 treesize of output 58 [2022-10-17 17:23:43,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-10-17 17:23:43,510 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-10-17 17:23:43,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 25 [2022-10-17 17:23:43,616 INFO L356 Elim1Store]: treesize reduction 94, result has 21.0 percent of original size [2022-10-17 17:23:43,618 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 98 treesize of output 98 [2022-10-17 17:23:43,688 INFO L356 Elim1Store]: treesize reduction 39, result has 35.0 percent of original size [2022-10-17 17:23:43,692 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 88 treesize of output 85 [2022-10-17 17:23:43,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-10-17 17:23:43,720 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-10-17 17:23:43,721 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 31 [2022-10-17 17:23:43,739 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 17:23:43,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 53 [2022-10-17 17:23:43,785 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2022-10-17 17:23:43,805 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:23:44,050 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '421#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_2| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_2|) (= (ite (<= 0 (select (select |#memory_int| |v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_2|) 0)) 1 0) |__VERIFIER_assert_#in~cond|))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-10-17 17:23:44,050 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:23:44,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:23:44,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-10-17 17:23:44,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677695106] [2022-10-17 17:23:44,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:23:44,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-10-17 17:23:44,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:44,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-10-17 17:23:44,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-10-17 17:23:44,052 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:44,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:44,091 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2022-10-17 17:23:44,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-10-17 17:23:44,092 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-10-17 17:23:44,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:44,095 INFO L225 Difference]: With dead ends: 35 [2022-10-17 17:23:44,096 INFO L226 Difference]: Without dead ends: 23 [2022-10-17 17:23:44,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-10-17 17:23:44,098 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:44,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 33 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:23:44,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-10-17 17:23:44,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-10-17 17:23:44,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:23:44,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-10-17 17:23:44,108 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2022-10-17 17:23:44,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:44,108 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-10-17 17:23:44,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:44,108 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-10-17 17:23:44,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-10-17 17:23:44,110 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:44,110 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:44,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-10-17 17:23:44,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:23:44,331 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:44,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:44,331 INFO L85 PathProgramCache]: Analyzing trace with hash -667235413, now seen corresponding path program 3 times [2022-10-17 17:23:44,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:44,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442162917] [2022-10-17 17:23:44,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:44,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:44,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:44,567 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-17 17:23:44,567 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:44,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442162917] [2022-10-17 17:23:44,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442162917] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:23:44,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931289258] [2022-10-17 17:23:44,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 17:23:44,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:23:44,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:23:44,575 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:23:44,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-10-17 17:23:44,651 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 17:23:44,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:23:44,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 17:23:44,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:23:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-17 17:23:44,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:23:44,719 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-17 17:23:44,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931289258] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:23:44,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [986839805] [2022-10-17 17:23:44,725 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-10-17 17:23:44,725 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:23:44,727 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:23:44,727 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:23:44,727 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:23:44,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:44,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:44,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:44,819 INFO L356 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-10-17 17:23:44,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-10-17 17:23:44,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:44,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:44,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:44,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-10-17 17:23:44,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:44,886 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 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 [2022-10-17 17:23:45,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:45,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:23:45,040 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-10-17 17:23:45,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 324 treesize of output 323 [2022-10-17 17:23:45,236 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:23:45,257 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:23:45,266 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:23:45,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 24 [2022-10-17 17:23:45,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:23:45,283 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:23:45,284 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2022-10-17 17:23:45,359 INFO L356 Elim1Store]: treesize reduction 94, result has 21.0 percent of original size [2022-10-17 17:23:45,359 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 98 treesize of output 98 [2022-10-17 17:23:45,481 INFO L356 Elim1Store]: treesize reduction 39, result has 35.0 percent of original size [2022-10-17 17:23:45,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 55 treesize of output 58 [2022-10-17 17:23:45,496 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-10-17 17:23:45,516 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 17:23:45,516 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 47 [2022-10-17 17:23:45,533 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-10-17 17:23:45,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 25 [2022-10-17 17:23:45,628 INFO L356 Elim1Store]: treesize reduction 94, result has 21.0 percent of original size [2022-10-17 17:23:45,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 98 treesize of output 98 [2022-10-17 17:23:45,703 INFO L356 Elim1Store]: treesize reduction 39, result has 35.0 percent of original size [2022-10-17 17:23:45,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 85 treesize of output 82 [2022-10-17 17:23:45,723 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 38 [2022-10-17 17:23:45,738 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 28 [2022-10-17 17:23:45,755 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-10-17 17:23:45,756 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 31 [2022-10-17 17:23:45,769 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-10-17 17:23:45,770 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 31 [2022-10-17 17:23:45,807 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2022-10-17 17:23:45,821 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:23:46,048 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '623#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (exists ((|v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_3| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_3|) (= |__VERIFIER_assert_#in~cond| (ite (<= 0 (select (select |#memory_int| |v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_3|) 0)) 1 0)))) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-10-17 17:23:46,048 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:23:46,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:23:46,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-10-17 17:23:46,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189342247] [2022-10-17 17:23:46,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:23:46,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-10-17 17:23:46,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:46,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-10-17 17:23:46,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-10-17 17:23:46,050 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:46,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:46,105 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2022-10-17 17:23:46,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-10-17 17:23:46,106 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-10-17 17:23:46,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:46,106 INFO L225 Difference]: With dead ends: 46 [2022-10-17 17:23:46,107 INFO L226 Difference]: Without dead ends: 29 [2022-10-17 17:23:46,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-10-17 17:23:46,108 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:46,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:23:46,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-10-17 17:23:46,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-10-17 17:23:46,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:23:46,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-10-17 17:23:46,121 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 16 [2022-10-17 17:23:46,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:46,121 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-10-17 17:23:46,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:46,121 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-10-17 17:23:46,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-10-17 17:23:46,123 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:46,123 INFO L195 NwaCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:46,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-10-17 17:23:46,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:23:46,339 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:46,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:46,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1851338581, now seen corresponding path program 4 times [2022-10-17 17:23:46,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:46,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656505421] [2022-10-17 17:23:46,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:46,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:46,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:46,629 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-17 17:23:46,630 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:46,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656505421] [2022-10-17 17:23:46,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656505421] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:23:46,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919655351] [2022-10-17 17:23:46,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-10-17 17:23:46,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:23:46,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:23:46,632 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:23:46,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-10-17 17:23:46,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:46,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 12 conjunts are in the unsatisfiable core [2022-10-17 17:23:46,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:23:46,743 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-17 17:23:46,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:23:46,926 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-17 17:23:46,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919655351] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:23:46,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [348053383] [2022-10-17 17:23:46,929 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-10-17 17:23:46,929 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:23:46,930 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:23:46,930 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:23:46,930 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:23:46,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:46,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:46,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:47,034 INFO L356 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-10-17 17:23:47,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-10-17 17:23:47,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:47,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:47,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:47,055 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-10-17 17:23:47,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:47,090 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 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 [2022-10-17 17:23:47,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:47,193 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:23:47,222 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-10-17 17:23:47,222 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 324 treesize of output 323 [2022-10-17 17:23:47,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:23:47,420 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:23:47,430 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:23:47,430 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2022-10-17 17:23:47,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:23:47,445 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:23:47,446 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 24 [2022-10-17 17:23:47,539 INFO L356 Elim1Store]: treesize reduction 94, result has 21.0 percent of original size [2022-10-17 17:23:47,539 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 98 treesize of output 98 [2022-10-17 17:23:47,675 INFO L356 Elim1Store]: treesize reduction 39, result has 35.0 percent of original size [2022-10-17 17:23:47,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 89 treesize of output 86 [2022-10-17 17:23:47,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-10-17 17:23:47,704 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-10-17 17:23:47,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 32 [2022-10-17 17:23:47,725 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-10-17 17:23:47,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 37 [2022-10-17 17:23:47,803 INFO L356 Elim1Store]: treesize reduction 39, result has 35.0 percent of original size [2022-10-17 17:23:47,803 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 80 treesize of output 77 [2022-10-17 17:23:47,820 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2022-10-17 17:23:47,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:23:47,836 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 24 [2022-10-17 17:23:47,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:23:47,848 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 24 [2022-10-17 17:23:47,937 INFO L356 Elim1Store]: treesize reduction 94, result has 21.0 percent of original size [2022-10-17 17:23:47,937 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 98 treesize of output 98 [2022-10-17 17:23:48,015 INFO L356 Elim1Store]: treesize reduction 39, result has 35.0 percent of original size [2022-10-17 17:23:48,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 55 treesize of output 58 [2022-10-17 17:23:48,028 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-10-17 17:23:48,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:48,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2022-10-17 17:23:48,060 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2022-10-17 17:23:48,073 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:23:48,333 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '907#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_4| Int)) (and (= |__VERIFIER_assert_#in~cond| (ite (<= 0 (select (select |#memory_int| |v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_4|) 0)) 1 0)) (<= 0 |v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_4|))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-10-17 17:23:48,333 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:23:48,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:23:48,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-10-17 17:23:48,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917383513] [2022-10-17 17:23:48,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:23:48,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-10-17 17:23:48,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:48,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-10-17 17:23:48,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=634, Unknown=0, NotChecked=0, Total=930 [2022-10-17 17:23:48,336 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:48,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:48,393 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2022-10-17 17:23:48,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-10-17 17:23:48,393 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-10-17 17:23:48,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:48,394 INFO L225 Difference]: With dead ends: 58 [2022-10-17 17:23:48,394 INFO L226 Difference]: Without dead ends: 41 [2022-10-17 17:23:48,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=296, Invalid=634, Unknown=0, NotChecked=0, Total=930 [2022-10-17 17:23:48,396 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:48,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-10-17 17:23:48,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-10-17 17:23:48,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-10-17 17:23:48,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:23:48,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2022-10-17 17:23:48,403 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 22 [2022-10-17 17:23:48,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:48,404 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2022-10-17 17:23:48,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:48,404 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2022-10-17 17:23:48,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-10-17 17:23:48,405 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:48,406 INFO L195 NwaCegarLoop]: trace histogram [22, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:48,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-10-17 17:23:48,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-10-17 17:23:48,631 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:48,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:48,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1882744149, now seen corresponding path program 5 times [2022-10-17 17:23:48,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:48,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805341740] [2022-10-17 17:23:48,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:48,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:48,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:49,268 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-10-17 17:23:49,269 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:49,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805341740] [2022-10-17 17:23:49,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805341740] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:23:49,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765468718] [2022-10-17 17:23:49,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-10-17 17:23:49,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:23:49,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:23:49,270 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:23:49,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-10-17 17:23:49,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-10-17 17:23:49,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:23:49,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2022-10-17 17:23:49,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:23:49,494 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-10-17 17:23:49,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:23:49,628 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-10-17 17:23:49,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765468718] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:23:49,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1526254373] [2022-10-17 17:23:49,630 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-10-17 17:23:49,630 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:23:49,631 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:23:49,631 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:23:49,631 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:23:49,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:49,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:49,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:49,725 INFO L356 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-10-17 17:23:49,725 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-10-17 17:23:49,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:49,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:49,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:49,744 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-10-17 17:23:49,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:49,779 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 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 [2022-10-17 17:23:49,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:49,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:49,896 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-10-17 17:23:49,897 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 334 treesize of output 322 [2022-10-17 17:23:49,970 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:23:49,996 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:23:50,005 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:23:50,005 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 24 [2022-10-17 17:23:50,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:23:50,024 INFO L356 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2022-10-17 17:23:50,025 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 23 [2022-10-17 17:23:50,106 INFO L356 Elim1Store]: treesize reduction 94, result has 21.0 percent of original size [2022-10-17 17:23:50,107 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 98 treesize of output 98 [2022-10-17 17:23:50,228 INFO L356 Elim1Store]: treesize reduction 39, result has 35.0 percent of original size [2022-10-17 17:23:50,228 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 55 treesize of output 58 [2022-10-17 17:23:50,245 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-10-17 17:23:50,261 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 17:23:50,261 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 47 [2022-10-17 17:23:50,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:50,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2022-10-17 17:23:50,320 INFO L356 Elim1Store]: treesize reduction 39, result has 35.0 percent of original size [2022-10-17 17:23:50,321 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 41 treesize of output 44 [2022-10-17 17:23:50,331 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-10-17 17:23:50,341 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-10-17 17:23:50,348 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-10-17 17:23:50,437 INFO L356 Elim1Store]: treesize reduction 94, result has 21.0 percent of original size [2022-10-17 17:23:50,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 98 treesize of output 98 [2022-10-17 17:23:50,505 INFO L356 Elim1Store]: treesize reduction 39, result has 35.0 percent of original size [2022-10-17 17:23:50,506 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 88 treesize of output 85 [2022-10-17 17:23:50,515 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-10-17 17:23:50,529 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 17:23:50,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 53 [2022-10-17 17:23:50,551 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-10-17 17:23:50,551 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 31 [2022-10-17 17:23:50,583 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2022-10-17 17:23:50,596 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:23:50,940 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1322#(and (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (exists ((|v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_5| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_5|) (= (ite (<= 0 (select (select |#memory_int| |v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_5|) 0)) 1 0) |__VERIFIER_assert_#in~cond|))) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-10-17 17:23:50,940 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:23:50,940 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:23:50,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 6, 6] total 34 [2022-10-17 17:23:50,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129695653] [2022-10-17 17:23:50,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:23:50,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-10-17 17:23:50,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:50,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-10-17 17:23:50,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1327, Unknown=0, NotChecked=0, Total=1722 [2022-10-17 17:23:50,945 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 35 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 34 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:51,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:51,479 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2022-10-17 17:23:51,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-10-17 17:23:51,480 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 34 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-10-17 17:23:51,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:51,481 INFO L225 Difference]: With dead ends: 65 [2022-10-17 17:23:51,481 INFO L226 Difference]: Without dead ends: 48 [2022-10-17 17:23:51,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 801 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1200, Invalid=2960, Unknown=0, NotChecked=0, Total=4160 [2022-10-17 17:23:51,485 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 8 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:51,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 55 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:23:51,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-10-17 17:23:51,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-10-17 17:23:51,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:23:51,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2022-10-17 17:23:51,493 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 34 [2022-10-17 17:23:51,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:51,494 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2022-10-17 17:23:51,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 34 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:51,494 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2022-10-17 17:23:51,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-10-17 17:23:51,495 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:51,496 INFO L195 NwaCegarLoop]: trace histogram [23, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:51,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-10-17 17:23:51,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:23:51,711 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:51,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:51,711 INFO L85 PathProgramCache]: Analyzing trace with hash 632384003, now seen corresponding path program 6 times [2022-10-17 17:23:51,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:51,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215516450] [2022-10-17 17:23:51,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:51,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:52,415 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-10-17 17:23:52,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:52,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215516450] [2022-10-17 17:23:52,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215516450] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:23:52,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427444224] [2022-10-17 17:23:52,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-10-17 17:23:52,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:23:52,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:23:52,422 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:23:52,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-10-17 17:23:52,549 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-10-17 17:23:52,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-10-17 17:23:52,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 25 conjunts are in the unsatisfiable core [2022-10-17 17:23:52,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:23:52,607 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-10-17 17:23:52,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:23:53,326 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-10-17 17:23:53,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427444224] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:23:53,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [971006717] [2022-10-17 17:23:53,328 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-10-17 17:23:53,328 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:23:53,329 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:23:53,329 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:23:53,329 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:23:53,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:53,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:53,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:53,415 INFO L356 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-10-17 17:23:53,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-10-17 17:23:53,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:53,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:53,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:53,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-10-17 17:23:53,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:53,476 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 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 [2022-10-17 17:23:53,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:53,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:53,599 INFO L356 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-10-17 17:23:53,600 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 334 treesize of output 322 [2022-10-17 17:23:53,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:23:53,711 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-10-17 17:23:53,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-10-17 17:23:53,726 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-10-17 17:23:53,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-10-17 17:23:53,793 INFO L356 Elim1Store]: treesize reduction 94, result has 21.0 percent of original size [2022-10-17 17:23:53,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 98 treesize of output 98 [2022-10-17 17:23:53,905 INFO L356 Elim1Store]: treesize reduction 39, result has 35.0 percent of original size [2022-10-17 17:23:53,905 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 89 treesize of output 86 [2022-10-17 17:23:53,916 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-10-17 17:23:53,931 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-10-17 17:23:53,932 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 32 [2022-10-17 17:23:53,947 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-10-17 17:23:53,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 37 [2022-10-17 17:23:54,016 INFO L356 Elim1Store]: treesize reduction 39, result has 35.0 percent of original size [2022-10-17 17:23:54,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 80 treesize of output 77 [2022-10-17 17:23:54,037 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2022-10-17 17:23:54,060 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:23:54,061 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 24 [2022-10-17 17:23:54,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:23:54,070 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 24 [2022-10-17 17:23:54,168 INFO L356 Elim1Store]: treesize reduction 94, result has 21.0 percent of original size [2022-10-17 17:23:54,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 98 treesize of output 98 [2022-10-17 17:23:54,223 INFO L356 Elim1Store]: treesize reduction 39, result has 35.0 percent of original size [2022-10-17 17:23:54,223 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 55 treesize of output 58 [2022-10-17 17:23:54,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-10-17 17:23:54,245 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 17:23:54,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 47 [2022-10-17 17:23:54,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:23:54,257 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2022-10-17 17:23:54,283 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2022-10-17 17:23:54,294 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:23:54,608 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1868#(and (exists ((|v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_6| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_6|) (= (ite (<= 0 (select (select |#memory_int| |v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_6|) 0)) 1 0) |__VERIFIER_assert_#in~cond|))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-10-17 17:23:54,608 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:23:54,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:23:54,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2022-10-17 17:23:54,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469347843] [2022-10-17 17:23:54,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:23:54,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-10-17 17:23:54,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:23:54,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-10-17 17:23:54,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1245, Invalid=1947, Unknown=0, NotChecked=0, Total=3192 [2022-10-17 17:23:54,612 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 50 states, 50 states have (on average 1.12) internal successors, (56), 49 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:54,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:23:54,720 INFO L93 Difference]: Finished difference Result 96 states and 128 transitions. [2022-10-17 17:23:54,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-10-17 17:23:54,721 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.12) internal successors, (56), 49 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-10-17 17:23:54,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:23:54,722 INFO L225 Difference]: With dead ends: 96 [2022-10-17 17:23:54,722 INFO L226 Difference]: Without dead ends: 73 [2022-10-17 17:23:54,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1245, Invalid=1947, Unknown=0, NotChecked=0, Total=3192 [2022-10-17 17:23:54,725 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:23:54,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 66 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:23:54,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-10-17 17:23:54,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-10-17 17:23:54,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 69 states have internal predecessors, (73), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:23:54,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2022-10-17 17:23:54,736 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 41 [2022-10-17 17:23:54,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:23:54,736 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2022-10-17 17:23:54,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.12) internal successors, (56), 49 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:23:54,737 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2022-10-17 17:23:54,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-10-17 17:23:54,739 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:23:54,739 INFO L195 NwaCegarLoop]: trace histogram [48, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:23:54,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-10-17 17:23:54,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:23:54,967 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:23:54,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:23:54,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1922554805, now seen corresponding path program 7 times [2022-10-17 17:23:54,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:23:54,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531670771] [2022-10-17 17:23:54,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:23:54,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:23:55,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:57,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-10-17 17:23:57,264 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-10-17 17:23:57,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531670771] [2022-10-17 17:23:57,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531670771] provided 0 perfect and 1 imperfect interpolant sequences [2022-10-17 17:23:57,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144599790] [2022-10-17 17:23:57,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-10-17 17:23:57,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:23:57,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 [2022-10-17 17:23:57,266 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-10-17 17:23:57,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-10-17 17:23:57,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 17:23:57,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 50 conjunts are in the unsatisfiable core [2022-10-17 17:23:57,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-10-17 17:23:57,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-10-17 17:23:57,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-10-17 17:24:00,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1231 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-10-17 17:24:00,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144599790] provided 0 perfect and 2 imperfect interpolant sequences [2022-10-17 17:24:00,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [111466696] [2022-10-17 17:24:00,367 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-10-17 17:24:00,367 INFO L166 IcfgInterpreter]: Building call graph [2022-10-17 17:24:00,368 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-10-17 17:24:00,368 INFO L176 IcfgInterpreter]: Starting interpretation [2022-10-17 17:24:00,368 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-10-17 17:24:00,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:24:00,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:24:00,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:24:00,436 INFO L356 Elim1Store]: treesize reduction 129, result has 17.8 percent of original size [2022-10-17 17:24:00,436 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 55 treesize of output 73 [2022-10-17 17:24:00,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:24:00,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:24:00,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:24:00,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 13 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2022-10-17 17:24:00,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:24:00,500 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 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 [2022-10-17 17:24:00,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-10-17 17:24:00,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-10-17 17:24:00,612 INFO L356 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-10-17 17:24:00,612 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 324 treesize of output 323 [2022-10-17 17:24:00,726 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-10-17 17:24:00,766 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-10-17 17:24:00,766 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2022-10-17 17:24:00,781 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-10-17 17:24:00,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2022-10-17 17:24:00,850 INFO L356 Elim1Store]: treesize reduction 94, result has 21.0 percent of original size [2022-10-17 17:24:00,850 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 98 treesize of output 98 [2022-10-17 17:24:00,956 INFO L356 Elim1Store]: treesize reduction 39, result has 35.0 percent of original size [2022-10-17 17:24:00,957 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 88 treesize of output 85 [2022-10-17 17:24:00,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-10-17 17:24:00,988 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 17:24:00,989 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 53 [2022-10-17 17:24:01,011 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-10-17 17:24:01,012 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 31 [2022-10-17 17:24:01,088 INFO L356 Elim1Store]: treesize reduction 94, result has 21.0 percent of original size [2022-10-17 17:24:01,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 98 treesize of output 98 [2022-10-17 17:24:01,145 INFO L356 Elim1Store]: treesize reduction 39, result has 35.0 percent of original size [2022-10-17 17:24:01,146 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 89 treesize of output 86 [2022-10-17 17:24:01,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-10-17 17:24:01,175 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-10-17 17:24:01,176 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 54 [2022-10-17 17:24:01,192 INFO L356 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2022-10-17 17:24:01,193 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 32 [2022-10-17 17:24:01,223 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 20 for LOIs [2022-10-17 17:24:01,253 INFO L180 IcfgInterpreter]: Interpretation finished [2022-10-17 17:24:01,695 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2680#(and (exists ((|v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_7| Int)) (and (<= 0 |v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_7|) (= |__VERIFIER_assert_#in~cond| (ite (<= 0 (select (select |#memory_int| |v_ULTIMATE.start_main_~#bb~0#1.base_BEFORE_CALL_7|) 0)) 1 0)))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-10-17 17:24:01,695 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-10-17 17:24:01,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-10-17 17:24:01,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 99 [2022-10-17 17:24:01,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980460466] [2022-10-17 17:24:01,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-10-17 17:24:01,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-10-17 17:24:01,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-10-17 17:24:01,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-10-17 17:24:01,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4970, Invalid=6372, Unknown=0, NotChecked=0, Total=11342 [2022-10-17 17:24:01,702 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 100 states, 100 states have (on average 1.06) internal successors, (106), 99 states have internal predecessors, (106), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:01,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-10-17 17:24:01,913 INFO L93 Difference]: Finished difference Result 146 states and 203 transitions. [2022-10-17 17:24:01,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-10-17 17:24:01,913 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.06) internal successors, (106), 99 states have internal predecessors, (106), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-10-17 17:24:01,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-10-17 17:24:01,919 INFO L225 Difference]: With dead ends: 146 [2022-10-17 17:24:01,919 INFO L226 Difference]: Without dead ends: 123 [2022-10-17 17:24:01,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4970, Invalid=6372, Unknown=0, NotChecked=0, Total=11342 [2022-10-17 17:24:01,926 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-10-17 17:24:01,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 55 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-10-17 17:24:01,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-10-17 17:24:01,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-10-17 17:24:01,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 119 states have (on average 1.0336134453781514) internal successors, (123), 119 states have internal predecessors, (123), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-10-17 17:24:01,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 127 transitions. [2022-10-17 17:24:01,954 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 127 transitions. Word has length 66 [2022-10-17 17:24:01,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-10-17 17:24:01,954 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 127 transitions. [2022-10-17 17:24:01,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.06) internal successors, (106), 99 states have internal predecessors, (106), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-10-17 17:24:01,955 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 127 transitions. [2022-10-17 17:24:01,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-10-17 17:24:01,956 INFO L187 NwaCegarLoop]: Found error trace [2022-10-17 17:24:01,957 INFO L195 NwaCegarLoop]: trace histogram [98, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 17:24:01,993 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-10-17 17:24:02,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_914d13c1-93c2-46a8-9b7e-9eef5891ac24/bin/utaipan-G1rejxKTta/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-10-17 17:24:02,183 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 17:24:02,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 17:24:02,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1793762123, now seen corresponding path program 8 times [2022-10-17 17:24:02,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-10-17 17:24:02,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017673463] [2022-10-17 17:24:02,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 17:24:02,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 17:24:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat