./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_two_index_03.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_two_index_03.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS --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 52914d7c178662889d0d1af19e507e51f5067aa3fe7ebdb303f414406fa46b67 --- 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-8393723 [2022-11-19 06:38:52,652 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-19 06:38:52,654 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-19 06:38:52,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-19 06:38:52,682 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-19 06:38:52,686 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-19 06:38:52,688 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-19 06:38:52,692 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-19 06:38:52,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-19 06:38:52,699 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-19 06:38:52,701 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-19 06:38:52,707 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-19 06:38:52,709 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-19 06:38:52,711 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-19 06:38:52,713 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-19 06:38:52,715 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-19 06:38:52,716 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-19 06:38:52,720 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-19 06:38:52,722 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-19 06:38:52,724 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-19 06:38:52,729 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-19 06:38:52,731 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-19 06:38:52,732 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-19 06:38:52,734 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-19 06:38:52,737 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-19 06:38:52,743 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-19 06:38:52,744 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-19 06:38:52,745 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-19 06:38:52,746 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-19 06:38:52,747 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-19 06:38:52,747 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-19 06:38:52,749 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-19 06:38:52,749 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-19 06:38:52,750 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-19 06:38:52,751 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-19 06:38:52,751 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-19 06:38:52,752 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-19 06:38:52,752 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-19 06:38:52,752 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-19 06:38:52,753 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-19 06:38:52,754 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-19 06:38:52,755 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-19 06:38:52,782 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-19 06:38:52,782 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-19 06:38:52,783 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-19 06:38:52,783 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-19 06:38:52,784 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-19 06:38:52,784 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-19 06:38:52,784 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-19 06:38:52,784 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-19 06:38:52,784 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-19 06:38:52,784 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-19 06:38:52,785 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-19 06:38:52,785 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-19 06:38:52,785 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-19 06:38:52,785 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-19 06:38:52,785 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-19 06:38:52,786 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-19 06:38:52,786 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-19 06:38:52,786 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-19 06:38:52,787 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-19 06:38:52,787 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-19 06:38:52,787 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-19 06:38:52,787 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-19 06:38:52,787 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-19 06:38:52,787 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-19 06:38:52,787 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-19 06:38:52,787 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-19 06:38:52,788 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-19 06:38:52,788 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-19 06:38:52,788 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-19 06:38:52,788 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-19 06:38:52,788 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-19 06:38:52,789 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-19 06:38:52,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:38:52,789 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-19 06:38:52,789 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-19 06:38:52,789 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-19 06:38:52,789 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-19 06:38:52,790 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-19 06:38:52,790 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-19 06:38:52,790 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-19 06:38:52,790 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-19 06:38:52,790 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_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52914d7c178662889d0d1af19e507e51f5067aa3fe7ebdb303f414406fa46b67 [2022-11-19 06:38:53,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-19 06:38:53,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-19 06:38:53,100 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-19 06:38:53,102 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-19 06:38:53,102 INFO L275 PluginConnector]: CDTParser initialized [2022-11-19 06:38:53,104 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/../../sv-benchmarks/c/array-examples/standard_two_index_03.i [2022-11-19 06:38:53,178 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/data/c1acd9522/11287f3a4bc3477d951db39a0ddf53e3/FLAG48e3be605 [2022-11-19 06:38:53,637 INFO L306 CDTParser]: Found 1 translation units. [2022-11-19 06:38:53,638 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/sv-benchmarks/c/array-examples/standard_two_index_03.i [2022-11-19 06:38:53,644 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/data/c1acd9522/11287f3a4bc3477d951db39a0ddf53e3/FLAG48e3be605 [2022-11-19 06:38:54,018 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/data/c1acd9522/11287f3a4bc3477d951db39a0ddf53e3 [2022-11-19 06:38:54,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-19 06:38:54,026 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-19 06:38:54,031 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-19 06:38:54,031 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-19 06:38:54,035 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-19 06:38:54,035 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:38:54" (1/1) ... [2022-11-19 06:38:54,037 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c7f0daa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:38:54, skipping insertion in model container [2022-11-19 06:38:54,038 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 06:38:54" (1/1) ... [2022-11-19 06:38:54,045 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-19 06:38:54,061 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-19 06:38:54,253 WARN L234 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_046dcb3f-bec7-4939-988c-ca46291b4c30/sv-benchmarks/c/array-examples/standard_two_index_03.i[814,827] [2022-11-19 06:38:54,267 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:38:54,274 INFO L203 MainTranslator]: Completed pre-run [2022-11-19 06:38:54,284 WARN L234 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_046dcb3f-bec7-4939-988c-ca46291b4c30/sv-benchmarks/c/array-examples/standard_two_index_03.i[814,827] [2022-11-19 06:38:54,290 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-19 06:38:54,303 INFO L208 MainTranslator]: Completed translation [2022-11-19 06:38:54,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:38:54 WrapperNode [2022-11-19 06:38:54,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-19 06:38:54,304 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-19 06:38:54,305 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-19 06:38:54,305 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-19 06:38:54,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:38:54" (1/1) ... [2022-11-19 06:38:54,318 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:38:54" (1/1) ... [2022-11-19 06:38:54,342 INFO L138 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-11-19 06:38:54,343 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-19 06:38:54,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-19 06:38:54,344 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-19 06:38:54,344 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-19 06:38:54,351 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:38:54" (1/1) ... [2022-11-19 06:38:54,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:38:54" (1/1) ... [2022-11-19 06:38:54,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:38:54" (1/1) ... [2022-11-19 06:38:54,353 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:38:54" (1/1) ... [2022-11-19 06:38:54,357 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:38:54" (1/1) ... [2022-11-19 06:38:54,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:38:54" (1/1) ... [2022-11-19 06:38:54,362 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:38:54" (1/1) ... [2022-11-19 06:38:54,363 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:38:54" (1/1) ... [2022-11-19 06:38:54,364 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-19 06:38:54,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-19 06:38:54,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-19 06:38:54,365 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-19 06:38:54,366 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:38:54" (1/1) ... [2022-11-19 06:38:54,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-19 06:38:54,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:38:54,399 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-19 06:38:54,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-19 06:38:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-19 06:38:54,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-19 06:38:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-19 06:38:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-19 06:38:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-19 06:38:54,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-19 06:38:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-19 06:38:54,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-19 06:38:54,504 INFO L235 CfgBuilder]: Building ICFG [2022-11-19 06:38:54,506 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-19 06:38:54,683 INFO L276 CfgBuilder]: Performing block encoding [2022-11-19 06:38:54,725 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-19 06:38:54,732 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-19 06:38:54,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:38:54 BoogieIcfgContainer [2022-11-19 06:38:54,736 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-19 06:38:54,738 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-19 06:38:54,739 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-19 06:38:54,742 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-19 06:38:54,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 06:38:54" (1/3) ... [2022-11-19 06:38:54,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e135a63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:38:54, skipping insertion in model container [2022-11-19 06:38:54,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 06:38:54" (2/3) ... [2022-11-19 06:38:54,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e135a63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 06:38:54, skipping insertion in model container [2022-11-19 06:38:54,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 06:38:54" (3/3) ... [2022-11-19 06:38:54,745 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_two_index_03.i [2022-11-19 06:38:54,766 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-19 06:38:54,767 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-19 06:38:54,837 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-19 06:38:54,846 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;@a57ff20, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-19 06:38:54,847 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-19 06:38:54,853 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:38:54,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-19 06:38:54,860 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:38:54,860 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-19 06:38:54,863 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:38:54,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:38:54,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1745982706, now seen corresponding path program 1 times [2022-11-19 06:38:54,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:38:54,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972991091] [2022-11-19 06:38:54,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:54,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:38:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:38:55,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:38:55,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:38:55,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972991091] [2022-11-19 06:38:55,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972991091] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:38:55,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-19 06:38:55,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-19 06:38:55,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34785146] [2022-11-19 06:38:55,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:38:55,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:38:55,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:38:55,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:38:55,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:38:55,245 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:38:55,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:38:55,290 INFO L93 Difference]: Finished difference Result 17 states and 23 transitions. [2022-11-19 06:38:55,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:38:55,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-11-19 06:38:55,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:38:55,312 INFO L225 Difference]: With dead ends: 17 [2022-11-19 06:38:55,312 INFO L226 Difference]: Without dead ends: 9 [2022-11-19 06:38:55,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-19 06:38:55,319 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:38:55,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:38:55,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-11-19 06:38:55,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2022-11-19 06:38:55,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:38:55,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2022-11-19 06:38:55,353 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 6 [2022-11-19 06:38:55,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:38:55,354 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2022-11-19 06:38:55,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:38:55,355 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2022-11-19 06:38:55,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-19 06:38:55,355 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:38:55,356 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:38:55,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-19 06:38:55,357 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:38:55,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:38:55,358 INFO L85 PathProgramCache]: Analyzing trace with hash 276578033, now seen corresponding path program 1 times [2022-11-19 06:38:55,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:38:55,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975505806] [2022-11-19 06:38:55,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:55,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:38:55,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:38:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-19 06:38:55,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:38:55,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975505806] [2022-11-19 06:38:55,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975505806] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:38:55,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500175596] [2022-11-19 06:38:55,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:55,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:55,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:38:55,526 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:38:55,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-19 06:38:55,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:38:55,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-19 06:38:55,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:38:55,645 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:38:55,645 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-19 06:38:55,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500175596] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-19 06:38:55,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-19 06:38:55,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-19 06:38:55,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617276266] [2022-11-19 06:38:55,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-19 06:38:55,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-19 06:38:55,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:38:55,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-19 06:38:55,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:38:55,658 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:38:55,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:38:55,693 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-11-19 06:38:55,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-19 06:38:55,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-11-19 06:38:55,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:38:55,696 INFO L225 Difference]: With dead ends: 20 [2022-11-19 06:38:55,696 INFO L226 Difference]: Without dead ends: 15 [2022-11-19 06:38:55,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-19 06:38:55,703 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:38:55,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 6 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:38:55,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-19 06:38:55,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 10. [2022-11-19 06:38:55,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:38:55,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-11-19 06:38:55,710 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 7 [2022-11-19 06:38:55,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:38:55,711 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-11-19 06:38:55,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:38:55,711 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-11-19 06:38:55,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-19 06:38:55,712 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:38:55,712 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-19 06:38:55,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-19 06:38:55,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-19 06:38:55,917 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:38:55,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:38:55,918 INFO L85 PathProgramCache]: Analyzing trace with hash -51261225, now seen corresponding path program 1 times [2022-11-19 06:38:55,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:38:55,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369469128] [2022-11-19 06:38:55,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:55,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:38:55,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:38:56,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:38:56,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:38:56,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369469128] [2022-11-19 06:38:56,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369469128] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:38:56,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049629012] [2022-11-19 06:38:56,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:56,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:56,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:38:56,035 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:38:56,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-19 06:38:56,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:38:56,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-19 06:38:56,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:38:56,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:38:56,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:38:56,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-19 06:38:56,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049629012] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:38:56,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1525563510] [2022-11-19 06:38:56,218 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:38:56,219 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:38:56,223 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:38:56,229 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:38:56,229 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:38:56,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:56,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:56,363 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 06:38:56,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-19 06:38:56,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:56,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:56,429 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 06:38:56,430 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 06:38:56,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:56,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 06:38:56,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:56,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:56,634 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 06:38:56,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 247 [2022-11-19 06:38:56,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 06:38:56,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:56,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-19 06:38:56,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:56,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:57,013 INFO L321 Elim1Store]: treesize reduction 95, result has 34.0 percent of original size [2022-11-19 06:38:57,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 103 [2022-11-19 06:38:57,166 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 06:38:57,167 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 06:38:57,191 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:38:57,401 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '164#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 12) 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |#NULL.base| 0))' at error location [2022-11-19 06:38:57,402 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:38:57,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:38:57,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-19 06:38:57,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421662301] [2022-11-19 06:38:57,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:38:57,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-19 06:38:57,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:38:57,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-19 06:38:57,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-11-19 06:38:57,406 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:38:57,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:38:57,457 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-11-19 06:38:57,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-19 06:38:57,458 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-19 06:38:57,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:38:57,459 INFO L225 Difference]: With dead ends: 31 [2022-11-19 06:38:57,459 INFO L226 Difference]: Without dead ends: 24 [2022-11-19 06:38:57,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-11-19 06:38:57,468 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 15 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-19 06:38:57,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 12 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-19 06:38:57,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-19 06:38:57,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2022-11-19 06:38:57,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:38:57,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-11-19 06:38:57,478 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-11-19 06:38:57,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:38:57,478 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-11-19 06:38:57,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:38:57,479 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-11-19 06:38:57,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-19 06:38:57,480 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:38:57,480 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2022-11-19 06:38:57,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-19 06:38:57,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:57,686 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:38:57,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:38:57,687 INFO L85 PathProgramCache]: Analyzing trace with hash 490227022, now seen corresponding path program 2 times [2022-11-19 06:38:57,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:38:57,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620908336] [2022-11-19 06:38:57,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:57,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:38:57,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:38:57,785 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:38:57,785 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:38:57,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620908336] [2022-11-19 06:38:57,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620908336] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:38:57,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941226369] [2022-11-19 06:38:57,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:38:57,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:57,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:38:57,788 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:38:57,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-19 06:38:57,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-19 06:38:57,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:38:57,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-19 06:38:57,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:38:57,881 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:38:57,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:38:57,913 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-19 06:38:57,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941226369] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:38:57,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [884183683] [2022-11-19 06:38:57,915 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:38:57,915 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:38:57,915 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:38:57,916 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:38:57,916 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:38:57,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:57,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:57,975 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 06:38:57,976 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-19 06:38:57,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:57,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:58,040 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 06:38:58,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 06:38:58,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:58,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 06:38:58,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:58,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:38:58,235 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 06:38:58,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 247 [2022-11-19 06:38:58,361 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 06:38:58,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:58,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-11-19 06:38:58,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:58,461 INFO L321 Elim1Store]: treesize reduction 109, result has 33.5 percent of original size [2022-11-19 06:38:58,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 81 treesize of output 109 [2022-11-19 06:38:58,538 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 06:38:58,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 06:38:58,551 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:38:58,718 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '312#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 12) 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |#NULL.base| 0))' at error location [2022-11-19 06:38:58,719 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:38:58,719 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:38:58,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-19 06:38:58,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555869416] [2022-11-19 06:38:58,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:38:58,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-19 06:38:58,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:38:58,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-19 06:38:58,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2022-11-19 06:38:58,722 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:38:58,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:38:58,793 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2022-11-19 06:38:58,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-19 06:38:58,793 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-11-19 06:38:58,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:38:58,794 INFO L225 Difference]: With dead ends: 54 [2022-11-19 06:38:58,794 INFO L226 Difference]: Without dead ends: 46 [2022-11-19 06:38:58,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2022-11-19 06:38:58,795 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 44 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:38:58,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 18 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:38:58,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-11-19 06:38:58,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 20. [2022-11-19 06:38:58,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:38:58,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2022-11-19 06:38:58,800 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2022-11-19 06:38:58,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:38:58,800 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2022-11-19 06:38:58,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:38:58,801 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2022-11-19 06:38:58,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-19 06:38:58,801 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:38:58,801 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2022-11-19 06:38:58,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-19 06:38:59,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:59,007 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:38:59,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:38:59,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1077845166, now seen corresponding path program 3 times [2022-11-19 06:38:59,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:38:59,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405368904] [2022-11-19 06:38:59,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:38:59,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:38:59,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:38:59,222 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 06:38:59,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:38:59,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405368904] [2022-11-19 06:38:59,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405368904] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:38:59,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292149175] [2022-11-19 06:38:59,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:38:59,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:38:59,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:38:59,224 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:38:59,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-19 06:38:59,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:38:59,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:38:59,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-19 06:38:59,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:38:59,351 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 06:38:59,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:38:59,450 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-19 06:38:59,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292149175] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:38:59,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [893486954] [2022-11-19 06:38:59,453 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:38:59,453 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:38:59,453 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:38:59,454 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:38:59,454 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:38:59,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:59,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:59,520 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 06:38:59,521 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 06:38:59,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:59,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:59,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-11-19 06:38:59,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:59,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 06:38:59,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:59,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:59,708 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 06:38:59,709 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 258 treesize of output 246 [2022-11-19 06:38:59,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 06:38:59,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:38:59,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 06:38:59,885 INFO L321 Elim1Store]: treesize reduction 119, result has 26.1 percent of original size [2022-11-19 06:38:59,885 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 86 treesize of output 108 [2022-11-19 06:38:59,933 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 06:38:59,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 06:38:59,948 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:39:00,105 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '555#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 12) 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |#NULL.base| 0))' at error location [2022-11-19 06:39:00,105 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:39:00,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:39:00,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2022-11-19 06:39:00,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532212123] [2022-11-19 06:39:00,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:39:00,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-19 06:39:00,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:39:00,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-19 06:39:00,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=396, Unknown=0, NotChecked=0, Total=702 [2022-11-19 06:39:00,107 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:39:00,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:39:00,242 INFO L93 Difference]: Finished difference Result 95 states and 115 transitions. [2022-11-19 06:39:00,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-19 06:39:00,243 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-11-19 06:39:00,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:39:00,244 INFO L225 Difference]: With dead ends: 95 [2022-11-19 06:39:00,244 INFO L226 Difference]: Without dead ends: 83 [2022-11-19 06:39:00,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=306, Invalid=396, Unknown=0, NotChecked=0, Total=702 [2022-11-19 06:39:00,246 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 84 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-19 06:39:00,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 51 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-19 06:39:00,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-11-19 06:39:00,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 37. [2022-11-19 06:39:00,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:39:00,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-11-19 06:39:00,260 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 18 [2022-11-19 06:39:00,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:39:00,260 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-11-19 06:39:00,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:39:00,260 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-11-19 06:39:00,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-19 06:39:00,261 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:39:00,261 INFO L195 NwaCegarLoop]: trace histogram [19, 10, 1, 1, 1, 1, 1, 1] [2022-11-19 06:39:00,269 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-19 06:39:00,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:39:00,467 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:39:00,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:39:00,468 INFO L85 PathProgramCache]: Analyzing trace with hash 579941201, now seen corresponding path program 4 times [2022-11-19 06:39:00,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:39:00,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806190329] [2022-11-19 06:39:00,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:39:00,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:39:00,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:39:00,853 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-19 06:39:00,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:39:00,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806190329] [2022-11-19 06:39:00,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806190329] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:39:00,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38355553] [2022-11-19 06:39:00,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:39:00,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:39:00,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:39:00,855 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:39:00,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-19 06:39:00,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:39:00,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-19 06:39:00,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:39:01,164 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 06:39:01,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:39:01,663 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-19 06:39:01,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38355553] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:39:01,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1890069524] [2022-11-19 06:39:01,665 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:39:01,665 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:39:01,665 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:39:01,665 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:39:01,666 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:39:01,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:01,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:01,725 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 06:39:01,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-19 06:39:01,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:01,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:01,783 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 06:39:01,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 06:39:01,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:01,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 06:39:01,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:01,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:01,936 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 06:39:01,936 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 258 treesize of output 246 [2022-11-19 06:39:01,993 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 06:39:02,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:02,006 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-19 06:39:02,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:02,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:02,082 INFO L321 Elim1Store]: treesize reduction 95, result has 34.0 percent of original size [2022-11-19 06:39:02,082 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 103 [2022-11-19 06:39:02,171 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 06:39:02,171 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 06:39:02,183 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:39:02,341 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1025#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 12) 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |#NULL.base| 0))' at error location [2022-11-19 06:39:02,341 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:39:02,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:39:02,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21, 21] total 47 [2022-11-19 06:39:02,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511499712] [2022-11-19 06:39:02,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:39:02,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-11-19 06:39:02,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:39:02,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-11-19 06:39:02,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1231, Invalid=1421, Unknown=0, NotChecked=0, Total=2652 [2022-11-19 06:39:02,344 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:39:02,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:39:02,679 INFO L93 Difference]: Finished difference Result 176 states and 212 transitions. [2022-11-19 06:39:02,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-19 06:39:02,679 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-11-19 06:39:02,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:39:02,680 INFO L225 Difference]: With dead ends: 176 [2022-11-19 06:39:02,681 INFO L226 Difference]: Without dead ends: 160 [2022-11-19 06:39:02,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1231, Invalid=1421, Unknown=0, NotChecked=0, Total=2652 [2022-11-19 06:39:02,683 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 299 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:39:02,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 87 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-19 06:39:02,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-11-19 06:39:02,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 70. [2022-11-19 06:39:02,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:39:02,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2022-11-19 06:39:02,692 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 35 [2022-11-19 06:39:02,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:39:02,692 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2022-11-19 06:39:02,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.297872340425532) internal successors, (61), 47 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:39:02,693 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2022-11-19 06:39:02,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-19 06:39:02,694 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:39:02,694 INFO L195 NwaCegarLoop]: trace histogram [44, 18, 1, 1, 1, 1, 1, 1] [2022-11-19 06:39:02,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-19 06:39:02,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-19 06:39:02,902 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:39:02,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:39:02,902 INFO L85 PathProgramCache]: Analyzing trace with hash 583456974, now seen corresponding path program 5 times [2022-11-19 06:39:02,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:39:02,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894573744] [2022-11-19 06:39:02,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:39:02,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:39:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:39:03,869 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2022-11-19 06:39:03,869 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:39:03,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894573744] [2022-11-19 06:39:03,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894573744] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:39:03,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181297572] [2022-11-19 06:39:03,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:39:03,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:39:03,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:39:03,871 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:39:03,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-19 06:39:09,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-19 06:39:09,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:39:09,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-19 06:39:09,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:39:09,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2022-11-19 06:39:09,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:39:10,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2022-11-19 06:39:10,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181297572] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:39:10,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1495831135] [2022-11-19 06:39:10,137 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:39:10,137 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:39:10,137 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:39:10,137 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:39:10,137 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:39:10,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:10,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:10,203 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 06:39:10,204 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-19 06:39:10,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:10,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:10,257 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 06:39:10,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 06:39:10,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:10,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-11-19 06:39:10,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:10,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:10,390 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-11-19 06:39:10,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 258 treesize of output 246 [2022-11-19 06:39:10,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 06:39:10,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:10,498 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 20 [2022-11-19 06:39:10,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:10,582 INFO L321 Elim1Store]: treesize reduction 109, result has 33.5 percent of original size [2022-11-19 06:39:10,582 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 81 treesize of output 109 [2022-11-19 06:39:10,655 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 06:39:10,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 06:39:10,671 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:39:10,827 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1879#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 12) 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |#NULL.base| 0))' at error location [2022-11-19 06:39:10,827 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:39:10,827 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:39:10,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2022-11-19 06:39:10,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284339825] [2022-11-19 06:39:10,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:39:10,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-19 06:39:10,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:39:10,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-19 06:39:10,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=956, Invalid=1114, Unknown=0, NotChecked=0, Total=2070 [2022-11-19 06:39:10,830 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:39:11,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:39:11,250 INFO L93 Difference]: Finished difference Result 281 states and 303 transitions. [2022-11-19 06:39:11,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-11-19 06:39:11,250 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-11-19 06:39:11,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:39:11,252 INFO L225 Difference]: With dead ends: 281 [2022-11-19 06:39:11,252 INFO L226 Difference]: Without dead ends: 276 [2022-11-19 06:39:11,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=956, Invalid=1114, Unknown=0, NotChecked=0, Total=2070 [2022-11-19 06:39:11,253 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 392 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-19 06:39:11,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [392 Valid, 114 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-19 06:39:11,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-11-19 06:39:11,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 90. [2022-11-19 06:39:11,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:39:11,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2022-11-19 06:39:11,264 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 68 [2022-11-19 06:39:11,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:39:11,264 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2022-11-19 06:39:11,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:39:11,265 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2022-11-19 06:39:11,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-11-19 06:39:11,266 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:39:11,266 INFO L195 NwaCegarLoop]: trace histogram [44, 38, 1, 1, 1, 1, 1, 1] [2022-11-19 06:39:11,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-19 06:39:11,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-19 06:39:11,467 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:39:11,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:39:11,467 INFO L85 PathProgramCache]: Analyzing trace with hash 850278350, now seen corresponding path program 6 times [2022-11-19 06:39:11,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:39:11,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643335859] [2022-11-19 06:39:11,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:39:11,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:39:11,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:39:13,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1731 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2022-11-19 06:39:13,436 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:39:13,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643335859] [2022-11-19 06:39:13,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643335859] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:39:13,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203640390] [2022-11-19 06:39:13,436 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-19 06:39:13,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:39:13,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:39:13,438 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:39:13,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-19 06:39:13,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-19 06:39:13,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-19 06:39:13,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-19 06:39:13,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:39:14,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1731 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2022-11-19 06:39:14,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:39:16,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1731 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2022-11-19 06:39:16,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203640390] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:39:16,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1574167559] [2022-11-19 06:39:16,658 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:39:16,658 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:39:16,658 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:39:16,659 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:39:16,659 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:39:16,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:16,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:16,721 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 06:39:16,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-19 06:39:16,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:16,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:16,774 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 06:39:16,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 06:39:16,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:16,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 06:39:16,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:16,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:16,880 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 06:39:16,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 247 [2022-11-19 06:39:16,986 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 06:39:16,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:16,999 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 06:39:17,064 INFO L321 Elim1Store]: treesize reduction 119, result has 26.1 percent of original size [2022-11-19 06:39:17,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 86 treesize of output 108 [2022-11-19 06:39:17,119 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 06:39:17,120 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 06:39:17,132 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:39:17,320 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3103#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 12) 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |#NULL.base| 0))' at error location [2022-11-19 06:39:17,320 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:39:17,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:39:17,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 46, 46] total 117 [2022-11-19 06:39:17,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145049315] [2022-11-19 06:39:17,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:39:17,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-11-19 06:39:17,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:39:17,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-11-19 06:39:17,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7146, Invalid=7616, Unknown=0, NotChecked=0, Total=14762 [2022-11-19 06:39:17,329 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 117 states, 117 states have (on average 1.188034188034188) internal successors, (139), 117 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:39:19,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:39:19,223 INFO L93 Difference]: Finished difference Result 490 states and 579 transitions. [2022-11-19 06:39:19,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-11-19 06:39:19,223 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.188034188034188) internal successors, (139), 117 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2022-11-19 06:39:19,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:39:19,226 INFO L225 Difference]: With dead ends: 490 [2022-11-19 06:39:19,226 INFO L226 Difference]: Without dead ends: 446 [2022-11-19 06:39:19,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6641 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=7146, Invalid=7616, Unknown=0, NotChecked=0, Total=14762 [2022-11-19 06:39:19,231 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1007 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 751 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1007 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 751 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-19 06:39:19,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1007 Valid, 219 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [751 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-19 06:39:19,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2022-11-19 06:39:19,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 176. [2022-11-19 06:39:19,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.0171428571428571) internal successors, (178), 175 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:39:19,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 178 transitions. [2022-11-19 06:39:19,248 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 178 transitions. Word has length 88 [2022-11-19 06:39:19,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:39:19,248 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 178 transitions. [2022-11-19 06:39:19,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.188034188034188) internal successors, (139), 117 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:39:19,249 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 178 transitions. [2022-11-19 06:39:19,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-11-19 06:39:19,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:39:19,251 INFO L195 NwaCegarLoop]: trace histogram [114, 54, 1, 1, 1, 1, 1, 1] [2022-11-19 06:39:19,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-19 06:39:19,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:39:19,458 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:39:19,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:39:19,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1333589230, now seen corresponding path program 7 times [2022-11-19 06:39:19,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:39:19,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625152504] [2022-11-19 06:39:19,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:39:19,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:39:19,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:39:23,439 INFO L134 CoverageAnalysis]: Checked inductivity of 8040 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2022-11-19 06:39:23,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:39:23,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625152504] [2022-11-19 06:39:23,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625152504] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:39:23,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685933316] [2022-11-19 06:39:23,440 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-19 06:39:23,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:39:23,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:39:23,442 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:39:23,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-19 06:39:23,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:39:23,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 116 conjunts are in the unsatisfiable core [2022-11-19 06:39:23,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-19 06:39:25,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8040 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2022-11-19 06:39:25,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-19 06:39:36,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8040 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 1485 trivial. 0 not checked. [2022-11-19 06:39:36,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685933316] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-19 06:39:36,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [226550790] [2022-11-19 06:39:36,233 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-11-19 06:39:36,233 INFO L166 IcfgInterpreter]: Building call graph [2022-11-19 06:39:36,234 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-11-19 06:39:36,234 INFO L176 IcfgInterpreter]: Starting interpretation [2022-11-19 06:39:36,234 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-11-19 06:39:36,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:36,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:36,280 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-11-19 06:39:36,280 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-11-19 06:39:36,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:36,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:36,330 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-19 06:39:36,331 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-11-19 06:39:36,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:36,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-11-19 06:39:36,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:36,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-19 06:39:36,456 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-11-19 06:39:36,457 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 248 treesize of output 247 [2022-11-19 06:39:36,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-11-19 06:39:36,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:36,558 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 17 [2022-11-19 06:39:36,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:36,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-19 06:39:36,622 INFO L321 Elim1Store]: treesize reduction 95, result has 34.0 percent of original size [2022-11-19 06:39:36,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 103 [2022-11-19 06:39:36,697 INFO L321 Elim1Store]: treesize reduction 48, result has 20.0 percent of original size [2022-11-19 06:39:36,701 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2022-11-19 06:39:36,716 INFO L180 IcfgInterpreter]: Interpretation finished [2022-11-19 06:39:36,917 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5498#(and (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~i~0#1| 1) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= (ite (= |ULTIMATE.start_main_#t~mem4#1| |ULTIMATE.start_main_#t~mem3#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start_main_#t~mem3#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 4)))) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (= |ULTIMATE.start_main_~j~0#1| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= (select (select |#memory_int| |ULTIMATE.start_main_~#b~0#1.base|) (+ |ULTIMATE.start_main_~#b~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| 12) 4)) |ULTIMATE.start_main_#t~mem4#1|) (= |#NULL.base| 0))' at error location [2022-11-19 06:39:36,917 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-11-19 06:39:36,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-19 06:39:36,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 116, 116] total 250 [2022-11-19 06:39:36,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65952956] [2022-11-19 06:39:36,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-19 06:39:36,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 250 states [2022-11-19 06:39:36,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-19 06:39:36,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 250 interpolants. [2022-11-19 06:39:36,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31884, Invalid=32886, Unknown=0, NotChecked=0, Total=64770 [2022-11-19 06:39:36,935 INFO L87 Difference]: Start difference. First operand 176 states and 178 transitions. Second operand has 250 states, 250 states have (on average 1.18) internal successors, (295), 250 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:39:50,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-19 06:39:50,214 INFO L93 Difference]: Finished difference Result 875 states and 1051 transitions. [2022-11-19 06:39:50,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 250 states. [2022-11-19 06:39:50,215 INFO L78 Accepts]: Start accepts. Automaton has has 250 states, 250 states have (on average 1.18) internal successors, (295), 250 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 174 [2022-11-19 06:39:50,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-19 06:39:50,218 INFO L225 Difference]: With dead ends: 875 [2022-11-19 06:39:50,218 INFO L226 Difference]: Without dead ends: 815 [2022-11-19 06:39:50,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31671 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=31884, Invalid=32886, Unknown=0, NotChecked=0, Total=64770 [2022-11-19 06:39:50,224 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1644 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 1135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1644 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 1876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1135 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-11-19 06:39:50,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1644 Valid, 486 Invalid, 1876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1135 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-11-19 06:39:50,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 815 states. [2022-11-19 06:39:50,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 815 to 349. [2022-11-19 06:39:50,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.0086206896551724) internal successors, (351), 348 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:39:50,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 351 transitions. [2022-11-19 06:39:50,249 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 351 transitions. Word has length 174 [2022-11-19 06:39:50,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-19 06:39:50,250 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 351 transitions. [2022-11-19 06:39:50,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 250 states, 250 states have (on average 1.18) internal successors, (295), 250 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-19 06:39:50,251 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 351 transitions. [2022-11-19 06:39:50,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-11-19 06:39:50,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-19 06:39:50,256 INFO L195 NwaCegarLoop]: trace histogram [247, 94, 1, 1, 1, 1, 1, 1] [2022-11-19 06:39:50,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-19 06:39:50,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:39:50,464 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-19 06:39:50,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-19 06:39:50,465 INFO L85 PathProgramCache]: Analyzing trace with hash 751998993, now seen corresponding path program 8 times [2022-11-19 06:39:50,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-19 06:39:50,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102110293] [2022-11-19 06:39:50,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-19 06:39:50,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-19 06:39:50,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-19 06:40:00,435 INFO L134 CoverageAnalysis]: Checked inductivity of 35093 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 30628 trivial. 0 not checked. [2022-11-19 06:40:00,435 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-19 06:40:00,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102110293] [2022-11-19 06:40:00,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102110293] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-19 06:40:00,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382188816] [2022-11-19 06:40:00,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-19 06:40:00,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-19 06:40:00,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 [2022-11-19 06:40:00,439 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-19 06:40:00,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_046dcb3f-bec7-4939-988c-ca46291b4c30/bin/utaipan-I9t0OCRTmS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process