./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_sentinel-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_sentinel-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 590a845a219659d0ad58521e10c3551f2ec7e80ca70e994a8616abe765f6f296 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 13:08:28,508 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 13:08:28,510 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 13:08:28,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 13:08:28,528 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 13:08:28,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 13:08:28,529 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 13:08:28,531 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 13:08:28,532 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 13:08:28,533 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 13:08:28,534 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 13:08:28,535 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 13:08:28,535 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 13:08:28,536 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 13:08:28,537 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 13:08:28,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 13:08:28,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 13:08:28,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 13:08:28,541 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 13:08:28,543 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 13:08:28,544 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 13:08:28,545 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 13:08:28,546 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 13:08:28,547 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 13:08:28,550 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 13:08:28,550 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 13:08:28,550 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 13:08:28,551 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 13:08:28,551 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 13:08:28,552 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 13:08:28,553 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 13:08:28,553 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 13:08:28,554 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 13:08:28,555 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 13:08:28,555 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 13:08:28,556 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 13:08:28,556 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 13:08:28,556 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 13:08:28,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 13:08:28,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 13:08:28,558 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 13:08:28,559 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 13:08:28,578 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 13:08:28,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 13:08:28,578 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 13:08:28,579 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 13:08:28,579 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 13:08:28,579 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 13:08:28,580 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 13:08:28,580 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 13:08:28,580 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 13:08:28,580 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 13:08:28,580 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 13:08:28,580 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 13:08:28,581 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 13:08:28,581 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 13:08:28,581 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 13:08:28,581 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 13:08:28,581 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 13:08:28,582 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 13:08:28,582 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 13:08:28,582 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 13:08:28,582 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 13:08:28,583 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 13:08:28,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 13:08:28,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 13:08:28,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 13:08:28,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 13:08:28,583 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 13:08:28,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 13:08:28,584 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 13:08:28,584 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 13:08:28,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 13:08:28,584 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 13:08:28,584 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:08:28,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 13:08:28,585 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 13:08:28,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 13:08:28,585 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 13:08:28,585 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 13:08:28,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 13:08:28,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 13:08:28,586 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 13:08:28,586 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_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 590a845a219659d0ad58521e10c3551f2ec7e80ca70e994a8616abe765f6f296 [2022-12-14 13:08:28,768 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 13:08:28,788 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 13:08:28,791 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 13:08:28,792 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 13:08:28,792 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 13:08:28,794 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-examples/standard_sentinel-2.i [2022-12-14 13:08:31,441 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 13:08:31,572 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 13:08:31,572 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/sv-benchmarks/c/array-examples/standard_sentinel-2.i [2022-12-14 13:08:31,578 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/data/5003c4098/7f253924d0ff4b9d8ab551296488309b/FLAG8c6ef1778 [2022-12-14 13:08:31,591 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/data/5003c4098/7f253924d0ff4b9d8ab551296488309b [2022-12-14 13:08:31,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 13:08:31,594 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 13:08:31,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 13:08:31,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 13:08:31,599 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 13:08:31,600 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:08:31" (1/1) ... [2022-12-14 13:08:31,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ab3aac6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:08:31, skipping insertion in model container [2022-12-14 13:08:31,601 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:08:31" (1/1) ... [2022-12-14 13:08:31,609 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 13:08:31,623 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 13:08:31,734 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/sv-benchmarks/c/array-examples/standard_sentinel-2.i[852,865] [2022-12-14 13:08:31,744 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:08:31,750 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 13:08:31,759 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/sv-benchmarks/c/array-examples/standard_sentinel-2.i[852,865] [2022-12-14 13:08:31,763 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 13:08:31,772 INFO L208 MainTranslator]: Completed translation [2022-12-14 13:08:31,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:08:31 WrapperNode [2022-12-14 13:08:31,773 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 13:08:31,774 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 13:08:31,774 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 13:08:31,774 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 13:08:31,779 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:08:31" (1/1) ... [2022-12-14 13:08:31,785 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:08:31" (1/1) ... [2022-12-14 13:08:31,797 INFO L138 Inliner]: procedures = 16, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2022-12-14 13:08:31,797 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 13:08:31,798 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 13:08:31,798 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 13:08:31,798 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 13:08:31,804 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:08:31" (1/1) ... [2022-12-14 13:08:31,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:08:31" (1/1) ... [2022-12-14 13:08:31,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:08:31" (1/1) ... [2022-12-14 13:08:31,805 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:08:31" (1/1) ... [2022-12-14 13:08:31,808 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:08:31" (1/1) ... [2022-12-14 13:08:31,811 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:08:31" (1/1) ... [2022-12-14 13:08:31,811 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:08:31" (1/1) ... [2022-12-14 13:08:31,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:08:31" (1/1) ... [2022-12-14 13:08:31,813 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 13:08:31,813 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 13:08:31,814 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 13:08:31,814 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 13:08:31,814 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:08:31" (1/1) ... [2022-12-14 13:08:31,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 13:08:31,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:08:31,837 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 13:08:31,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 13:08:31,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 13:08:31,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 13:08:31,878 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 13:08:31,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 13:08:31,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 13:08:31,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 13:08:31,878 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 13:08:31,878 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 13:08:31,939 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 13:08:31,941 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 13:08:32,039 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 13:08:32,063 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 13:08:32,064 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-12-14 13:08:32,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:08:32 BoogieIcfgContainer [2022-12-14 13:08:32,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 13:08:32,068 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 13:08:32,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 13:08:32,071 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 13:08:32,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:08:31" (1/3) ... [2022-12-14 13:08:32,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47669179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:08:32, skipping insertion in model container [2022-12-14 13:08:32,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:08:31" (2/3) ... [2022-12-14 13:08:32,073 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47669179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:08:32, skipping insertion in model container [2022-12-14 13:08:32,073 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:08:32" (3/3) ... [2022-12-14 13:08:32,074 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_sentinel-2.i [2022-12-14 13:08:32,092 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 13:08:32,092 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 13:08:32,140 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 13:08:32,146 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;@268dfcd9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 13:08:32,146 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 13:08:32,149 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:08:32,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 13:08:32,154 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:08:32,156 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:08:32,157 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:08:32,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:08:32,161 INFO L85 PathProgramCache]: Analyzing trace with hash -2083082669, now seen corresponding path program 1 times [2022-12-14 13:08:32,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:08:32,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539147099] [2022-12-14 13:08:32,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:32,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:08:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:32,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:08:32,336 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:08:32,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539147099] [2022-12-14 13:08:32,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539147099] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:08:32,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 13:08:32,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 13:08:32,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685261119] [2022-12-14 13:08:32,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:08:32,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 13:08:32,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:08:32,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 13:08:32,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:08:32,378 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 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) [2022-12-14 13:08:32,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:08:32,406 INFO L93 Difference]: Finished difference Result 23 states and 31 transitions. [2022-12-14 13:08:32,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 13:08:32,408 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 [2022-12-14 13:08:32,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:08:32,416 INFO L225 Difference]: With dead ends: 23 [2022-12-14 13:08:32,416 INFO L226 Difference]: Without dead ends: 10 [2022-12-14 13:08:32,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 13:08:32,422 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:08:32,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:08:32,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-12-14 13:08:32,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-12-14 13:08:32,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) [2022-12-14 13:08:32,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-12-14 13:08:32,448 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2022-12-14 13:08:32,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:08:32,449 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-12-14 13:08:32,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:08:32,449 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-12-14 13:08:32,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 13:08:32,449 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:08:32,450 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:08:32,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 13:08:32,450 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:08:32,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:08:32,451 INFO L85 PathProgramCache]: Analyzing trace with hash 212079459, now seen corresponding path program 1 times [2022-12-14 13:08:32,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:08:32,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430451281] [2022-12-14 13:08:32,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:32,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:08:32,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:32,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:08:32,534 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:08:32,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430451281] [2022-12-14 13:08:32,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430451281] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:08:32,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745769825] [2022-12-14 13:08:32,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:32,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:32,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:08:32,537 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:08:32,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 13:08:32,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:32,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:08:32,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:08:32,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:08:32,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:08:32,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 13:08:32,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745769825] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:08:32,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2007563248] [2022-12-14 13:08:32,679 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:08:32,679 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:08:32,682 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:08:32,687 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:08:32,687 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:08:32,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:32,790 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:08:32,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 13:08:32,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:32,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 13:08:32,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:32,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 13:08:32,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:32,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:08:32,994 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 13:08:32,995 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 186 treesize of output 185 [2022-12-14 13:08:33,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:08:33,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:08:33,126 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:08:33,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSifa [2007563248] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 13:08:33,313 INFO L184 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:08:33,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [3, 3, 3] total 11 [2022-12-14 13:08:33,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353084169] [2022-12-14 13:08:33,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 13:08:33,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-14 13:08:33,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:08:33,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-14 13:08:33,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-12-14 13:08:33,317 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:08:33,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:08:33,351 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2022-12-14 13:08:33,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-14 13:08:33,351 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 13:08:33,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:08:33,352 INFO L225 Difference]: With dead ends: 16 [2022-12-14 13:08:33,352 INFO L226 Difference]: Without dead ends: 12 [2022-12-14 13:08:33,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-12-14 13:08:33,353 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:08:33,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 4 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:08:33,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-12-14 13:08:33,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-12-14 13:08:33,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 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) [2022-12-14 13:08:33,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2022-12-14 13:08:33,358 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 9 [2022-12-14 13:08:33,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:08:33,358 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2022-12-14 13:08:33,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:08:33,358 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2022-12-14 13:08:33,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 13:08:33,359 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:08:33,359 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:08:33,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 13:08:33,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-12-14 13:08:33,560 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:08:33,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:08:33,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1993571998, now seen corresponding path program 1 times [2022-12-14 13:08:33,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:08:33,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011052953] [2022-12-14 13:08:33,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:33,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:08:33,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:08:33,705 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:08:33,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011052953] [2022-12-14 13:08:33,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011052953] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:08:33,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799156294] [2022-12-14 13:08:33,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:33,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:33,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:08:33,707 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:08:33,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 13:08:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:33,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 13:08:33,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:08:33,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:08:33,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:08:33,768 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:08:33,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799156294] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:08:33,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [117484448] [2022-12-14 13:08:33,771 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:08:33,771 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:08:33,772 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:08:33,772 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:08:33,772 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:08:33,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:33,800 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:08:33,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 13:08:33,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:33,813 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 13:08:33,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:33,836 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 13:08:33,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:33,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:33,908 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 13:08:33,909 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 196 treesize of output 184 [2022-12-14 13:08:33,959 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:08:33,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:08:34,033 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:08:34,260 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '222#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~marker~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~pos~0#1| 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~pos~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~marker~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:08:34,260 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:08:34,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:08:34,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-12-14 13:08:34,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912967344] [2022-12-14 13:08:34,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:08:34,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-14 13:08:34,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:08:34,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-14 13:08:34,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-12-14 13:08:34,262 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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) [2022-12-14 13:08:34,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:08:34,275 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2022-12-14 13:08:34,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 13:08:34,275 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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 11 [2022-12-14 13:08:34,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:08:34,276 INFO L225 Difference]: With dead ends: 24 [2022-12-14 13:08:34,276 INFO L226 Difference]: Without dead ends: 15 [2022-12-14 13:08:34,276 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-12-14 13:08:34,277 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:08:34,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:08:34,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-12-14 13:08:34,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-12-14 13:08:34,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:08:34,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-12-14 13:08:34,282 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-12-14 13:08:34,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:08:34,283 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-12-14 13:08:34,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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) [2022-12-14 13:08:34,283 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-12-14 13:08:34,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 13:08:34,283 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:08:34,283 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:08:34,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 13:08:34,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:34,485 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:08:34,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:08:34,485 INFO L85 PathProgramCache]: Analyzing trace with hash 564380331, now seen corresponding path program 2 times [2022-12-14 13:08:34,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:08:34,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209882842] [2022-12-14 13:08:34,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:34,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:08:34,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:34,602 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 13:08:34,603 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:08:34,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209882842] [2022-12-14 13:08:34,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209882842] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:08:34,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670199549] [2022-12-14 13:08:34,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:08:34,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:34,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:08:34,604 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:08:34,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 13:08:34,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-12-14 13:08:34,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:08:34,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 16 conjunts are in the unsatisfiable core [2022-12-14 13:08:34,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:08:34,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:08:34,680 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:08:34,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2022-12-14 13:08:34,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 13:08:34,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:08:34,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-14 13:08:34,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670199549] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:08:34,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1791232503] [2022-12-14 13:08:34,803 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:08:34,803 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:08:34,803 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:08:34,803 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:08:34,803 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:08:34,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:34,829 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:08:34,829 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 13:08:34,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:34,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 13:08:34,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:34,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 13:08:34,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:34,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:08:34,923 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 13:08:34,924 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 186 treesize of output 185 [2022-12-14 13:08:35,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:08:35,017 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:08:35,062 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:08:35,316 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '377#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~marker~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~pos~0#1| 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~pos~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~marker~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:08:35,316 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:08:35,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:08:35,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2022-12-14 13:08:35,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709818282] [2022-12-14 13:08:35,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:08:35,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-12-14 13:08:35,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:08:35,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-12-14 13:08:35,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-12-14 13:08:35,318 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:08:35,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:08:35,446 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-12-14 13:08:35,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 13:08:35,446 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 13:08:35,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:08:35,447 INFO L225 Difference]: With dead ends: 33 [2022-12-14 13:08:35,447 INFO L226 Difference]: Without dead ends: 20 [2022-12-14 13:08:35,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2022-12-14 13:08:35,448 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:08:35,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 25 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:08:35,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-12-14 13:08:35,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-12-14 13:08:35,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:08:35,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-12-14 13:08:35,454 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 14 [2022-12-14 13:08:35,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:08:35,454 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-12-14 13:08:35,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:08:35,454 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-12-14 13:08:35,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 13:08:35,455 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:08:35,455 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:08:35,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 13:08:35,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:35,657 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:08:35,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:08:35,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1381842964, now seen corresponding path program 3 times [2022-12-14 13:08:35,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:08:35,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350414559] [2022-12-14 13:08:35,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:35,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:08:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:35,783 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 13:08:35,783 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:08:35,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350414559] [2022-12-14 13:08:35,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350414559] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:08:35,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991641591] [2022-12-14 13:08:35,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:08:35,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:35,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:08:35,785 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:08:35,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 13:08:35,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:08:35,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:08:35,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 13:08:35,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:08:35,847 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 13:08:35,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:08:35,901 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 13:08:35,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991641591] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:08:35,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1754221654] [2022-12-14 13:08:35,903 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:08:35,904 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:08:35,904 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:08:35,904 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:08:35,904 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:08:35,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:35,928 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:08:35,928 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 13:08:35,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:35,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 13:08:35,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:35,961 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 13:08:36,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:36,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:08:36,023 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 13:08:36,023 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 186 treesize of output 185 [2022-12-14 13:08:36,085 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:08:36,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:08:36,139 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:08:36,331 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '591#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~marker~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~pos~0#1| 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~pos~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~marker~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:08:36,331 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:08:36,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:08:36,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-12-14 13:08:36,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119551721] [2022-12-14 13:08:36,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:08:36,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-12-14 13:08:36,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:08:36,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-12-14 13:08:36,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2022-12-14 13:08:36,334 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:08:36,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:08:36,352 INFO L93 Difference]: Finished difference Result 40 states and 48 transitions. [2022-12-14 13:08:36,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-12-14 13:08:36,353 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 13:08:36,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:08:36,354 INFO L225 Difference]: With dead ends: 40 [2022-12-14 13:08:36,354 INFO L226 Difference]: Without dead ends: 27 [2022-12-14 13:08:36,354 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2022-12-14 13:08:36,355 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:08:36,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:08:36,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-12-14 13:08:36,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-12-14 13:08:36,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:08:36,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-12-14 13:08:36,363 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 19 [2022-12-14 13:08:36,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:08:36,363 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-12-14 13:08:36,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:08:36,363 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-12-14 13:08:36,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-12-14 13:08:36,364 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:08:36,364 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:08:36,370 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 13:08:36,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:36,565 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:08:36,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:08:36,566 INFO L85 PathProgramCache]: Analyzing trace with hash -55436319, now seen corresponding path program 4 times [2022-12-14 13:08:36,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:08:36,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522760300] [2022-12-14 13:08:36,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:36,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:08:36,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:36,809 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 13:08:36,809 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:08:36,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522760300] [2022-12-14 13:08:36,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522760300] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:08:36,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049287128] [2022-12-14 13:08:36,810 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:08:36,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:36,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:08:36,811 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:08:36,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 13:08:36,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:36,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-14 13:08:36,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:08:36,882 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 13:08:36,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:08:37,057 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 13:08:37,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049287128] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:08:37,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1873091438] [2022-12-14 13:08:37,058 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:08:37,059 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:08:37,059 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:08:37,059 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:08:37,059 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:08:37,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:37,074 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:08:37,074 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 13:08:37,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:37,088 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:08:37,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 13:08:37,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:37,103 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 13:08:37,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:37,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:08:37,150 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 13:08:37,150 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 186 treesize of output 185 [2022-12-14 13:08:37,203 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:08:37,212 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:08:37,243 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:08:37,481 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '881#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~marker~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~pos~0#1| 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~pos~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~marker~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:08:37,481 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:08:37,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:08:37,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2022-12-14 13:08:37,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319185301] [2022-12-14 13:08:37,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:08:37,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-12-14 13:08:37,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:08:37,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-12-14 13:08:37,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=780, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 13:08:37,483 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 28 states, 28 states have (on average 1.25) internal successors, (35), 27 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:08:37,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:08:37,517 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2022-12-14 13:08:37,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-12-14 13:08:37,518 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.25) internal successors, (35), 27 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-12-14 13:08:37,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:08:37,518 INFO L225 Difference]: With dead ends: 54 [2022-12-14 13:08:37,518 INFO L226 Difference]: Without dead ends: 41 [2022-12-14 13:08:37,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=410, Invalid=780, Unknown=0, NotChecked=0, Total=1190 [2022-12-14 13:08:37,520 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:08:37,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:08:37,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-12-14 13:08:37,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-12-14 13:08:37,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:08:37,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2022-12-14 13:08:37,526 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 26 [2022-12-14 13:08:37,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:08:37,526 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2022-12-14 13:08:37,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.25) internal successors, (35), 27 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:08:37,527 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2022-12-14 13:08:37,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-12-14 13:08:37,528 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:08:37,528 INFO L195 NwaCegarLoop]: trace histogram [26, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:08:37,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 13:08:37,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-14 13:08:37,729 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:08:37,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:08:37,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1283424385, now seen corresponding path program 5 times [2022-12-14 13:08:37,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:08:37,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429983956] [2022-12-14 13:08:37,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:37,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:08:37,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:38,256 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-12-14 13:08:38,257 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:08:38,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429983956] [2022-12-14 13:08:38,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429983956] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:08:38,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098766770] [2022-12-14 13:08:38,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:08:38,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:38,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:08:38,258 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:08:38,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 13:08:38,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-12-14 13:08:38,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:08:38,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 13:08:38,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:08:38,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:08:38,519 INFO L321 Elim1Store]: treesize reduction 8, result has 84.9 percent of original size [2022-12-14 13:08:38,519 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 59 [2022-12-14 13:08:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-12-14 13:08:38,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:08:38,972 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-12-14 13:08:38,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098766770] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:08:38,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1287564134] [2022-12-14 13:08:38,974 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:08:38,974 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:08:38,974 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:08:38,975 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:08:38,975 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:08:38,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:38,994 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:08:38,995 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 13:08:39,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:39,013 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:08:39,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 13:08:39,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:39,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 13:08:39,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:39,072 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:08:39,090 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 13:08:39,091 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 186 treesize of output 185 [2022-12-14 13:08:39,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:08:39,165 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:08:39,205 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:08:39,511 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1328#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~marker~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~pos~0#1| 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~pos~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~marker~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:08:39,511 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:08:39,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:08:39,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10, 10] total 45 [2022-12-14 13:08:39,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278903072] [2022-12-14 13:08:39,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:08:39,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-12-14 13:08:39,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:08:39,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-12-14 13:08:39,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=2138, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 13:08:39,515 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 45 states, 45 states have (on average 1.3333333333333333) internal successors, (60), 45 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:08:40,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:08:40,304 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2022-12-14 13:08:40,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-12-14 13:08:40,305 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.3333333333333333) internal successors, (60), 45 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-12-14 13:08:40,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:08:40,305 INFO L225 Difference]: With dead ends: 71 [2022-12-14 13:08:40,305 INFO L226 Difference]: Without dead ends: 50 [2022-12-14 13:08:40,307 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=636, Invalid=3270, Unknown=0, NotChecked=0, Total=3906 [2022-12-14 13:08:40,308 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 24 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:08:40,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 42 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:08:40,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-12-14 13:08:40,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-12-14 13:08:40,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:08:40,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2022-12-14 13:08:40,318 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 40 [2022-12-14 13:08:40,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:08:40,318 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2022-12-14 13:08:40,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.3333333333333333) internal successors, (60), 45 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:08:40,318 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2022-12-14 13:08:40,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-12-14 13:08:40,319 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:08:40,319 INFO L195 NwaCegarLoop]: trace histogram [27, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:08:40,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 13:08:40,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 13:08:40,521 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:08:40,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:08:40,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1137004896, now seen corresponding path program 6 times [2022-12-14 13:08:40,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:08:40,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138542729] [2022-12-14 13:08:40,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:40,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:08:40,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:41,033 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 13:08:41,033 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:08:41,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138542729] [2022-12-14 13:08:41,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138542729] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:08:41,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971644906] [2022-12-14 13:08:41,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:08:41,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:41,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:08:41,034 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:08:41,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 13:08:41,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:08:41,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:08:41,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 29 conjunts are in the unsatisfiable core [2022-12-14 13:08:41,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:08:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 13:08:41,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:08:41,806 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 13:08:41,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971644906] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:08:41,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [315600986] [2022-12-14 13:08:41,808 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:08:41,809 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:08:41,809 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:08:41,809 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:08:41,809 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:08:41,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:41,830 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:08:41,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 13:08:41,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:41,838 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 13:08:41,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:41,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 13:08:41,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:41,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:41,901 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 13:08:41,902 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 196 treesize of output 184 [2022-12-14 13:08:41,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:08:41,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:08:41,975 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:08:42,316 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1900#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~marker~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~pos~0#1| 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~pos~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~marker~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:08:42,317 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:08:42,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:08:42,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2022-12-14 13:08:42,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918563905] [2022-12-14 13:08:42,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:08:42,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-12-14 13:08:42,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:08:42,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-12-14 13:08:42,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1685, Invalid=2475, Unknown=0, NotChecked=0, Total=4160 [2022-12-14 13:08:42,321 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 58 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 57 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:08:42,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:08:42,388 INFO L93 Difference]: Finished difference Result 100 states and 130 transitions. [2022-12-14 13:08:42,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-12-14 13:08:42,388 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 57 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-12-14 13:08:42,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:08:42,388 INFO L225 Difference]: With dead ends: 100 [2022-12-14 13:08:42,388 INFO L226 Difference]: Without dead ends: 79 [2022-12-14 13:08:42,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1685, Invalid=2475, Unknown=0, NotChecked=0, Total=4160 [2022-12-14 13:08:42,390 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:08:42,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 13:08:42,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-12-14 13:08:42,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-12-14 13:08:42,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0256410256410255) internal successors, (80), 78 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:08:42,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-12-14 13:08:42,404 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 49 [2022-12-14 13:08:42,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:08:42,404 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-12-14 13:08:42,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 57 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:08:42,404 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-12-14 13:08:42,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-12-14 13:08:42,405 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:08:42,405 INFO L195 NwaCegarLoop]: trace histogram [56, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:08:42,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 13:08:42,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:42,606 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:08:42,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:08:42,607 INFO L85 PathProgramCache]: Analyzing trace with hash 820076173, now seen corresponding path program 7 times [2022-12-14 13:08:42,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:08:42,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124369565] [2022-12-14 13:08:42,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:42,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:08:42,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:44,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1652 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 13:08:44,393 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:08:44,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124369565] [2022-12-14 13:08:44,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124369565] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:08:44,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257305596] [2022-12-14 13:08:44,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:08:44,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:44,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:08:44,394 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:08:44,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 13:08:44,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:44,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 58 conjunts are in the unsatisfiable core [2022-12-14 13:08:44,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:08:44,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1652 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 13:08:44,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:08:46,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1652 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 13:08:46,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257305596] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:08:46,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1516645149] [2022-12-14 13:08:46,662 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:08:46,662 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:08:46,662 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:08:46,662 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:08:46,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:08:46,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:46,678 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:08:46,678 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 13:08:46,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:46,693 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:08:46,693 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 13:08:46,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:46,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 13:08:46,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:46,748 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:08:46,761 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 13:08:46,762 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 186 treesize of output 185 [2022-12-14 13:08:46,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:08:46,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:08:46,874 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:08:47,247 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2802#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~marker~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~pos~0#1| 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~pos~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~marker~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:08:47,248 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:08:47,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:08:47,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 115 [2022-12-14 13:08:47,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153920479] [2022-12-14 13:08:47,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:08:47,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-12-14 13:08:47,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:08:47,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-12-14 13:08:47,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6702, Invalid=8304, Unknown=0, NotChecked=0, Total=15006 [2022-12-14 13:08:47,252 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 116 states, 116 states have (on average 1.0603448275862069) internal successors, (123), 115 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:08:47,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:08:47,394 INFO L93 Difference]: Finished difference Result 158 states and 217 transitions. [2022-12-14 13:08:47,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-12-14 13:08:47,395 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.0603448275862069) internal successors, (123), 115 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2022-12-14 13:08:47,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:08:47,396 INFO L225 Difference]: With dead ends: 158 [2022-12-14 13:08:47,396 INFO L226 Difference]: Without dead ends: 137 [2022-12-14 13:08:47,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=6702, Invalid=8304, Unknown=0, NotChecked=0, Total=15006 [2022-12-14 13:08:47,399 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:08:47,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:08:47,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-12-14 13:08:47,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-12-14 13:08:47,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:08:47,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2022-12-14 13:08:47,421 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 78 [2022-12-14 13:08:47,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:08:47,421 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2022-12-14 13:08:47,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.0603448275862069) internal successors, (123), 115 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:08:47,421 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2022-12-14 13:08:47,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-12-14 13:08:47,423 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:08:47,423 INFO L195 NwaCegarLoop]: trace histogram [114, 8, 7, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:08:47,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 13:08:47,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:47,625 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:08:47,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:08:47,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1238198125, now seen corresponding path program 8 times [2022-12-14 13:08:47,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:08:47,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85245648] [2022-12-14 13:08:47,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:08:47,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:08:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:08:52,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6611 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-14 13:08:52,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:08:52,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85245648] [2022-12-14 13:08:52,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85245648] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:08:52,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232461732] [2022-12-14 13:08:52,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:08:52,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:08:52,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:08:52,726 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:08:52,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 13:08:53,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-12-14 13:08:53,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:08:53,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 47 conjunts are in the unsatisfiable core [2022-12-14 13:08:53,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:08:53,081 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:08:54,996 INFO L321 Elim1Store]: treesize reduction 24, result has 87.2 percent of original size [2022-12-14 13:08:54,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 83 treesize of output 193 [2022-12-14 13:08:55,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6611 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2022-12-14 13:08:55,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:08:58,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6611 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2022-12-14 13:08:58,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232461732] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:08:58,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [365703870] [2022-12-14 13:08:58,317 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:08:58,317 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:08:58,317 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:08:58,317 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:08:58,317 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:08:58,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:58,338 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:08:58,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 13:08:58,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:58,346 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 13:08:58,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:58,360 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 13:08:58,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:08:58,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:08:58,422 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 13:08:58,422 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 186 treesize of output 185 [2022-12-14 13:08:58,468 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:08:58,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:08:58,510 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:08:59,211 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4317#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~marker~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~pos~0#1| 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~pos~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~marker~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:08:59,211 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:08:59,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:08:59,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 18, 18] total 149 [2022-12-14 13:08:59,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504805694] [2022-12-14 13:08:59,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:08:59,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2022-12-14 13:08:59,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:08:59,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2022-12-14 13:08:59,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7070, Invalid=17110, Unknown=0, NotChecked=0, Total=24180 [2022-12-14 13:08:59,219 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 149 states, 149 states have (on average 1.1006711409395973) internal successors, (164), 149 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:09:06,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:09:06,553 INFO L93 Difference]: Finished difference Result 191 states and 201 transitions. [2022-12-14 13:09:06,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2022-12-14 13:09:06,554 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 1.1006711409395973) internal successors, (164), 149 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2022-12-14 13:09:06,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:09:06,555 INFO L225 Difference]: With dead ends: 191 [2022-12-14 13:09:06,555 INFO L226 Difference]: Without dead ends: 154 [2022-12-14 13:09:06,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5572 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=7546, Invalid=24316, Unknown=0, NotChecked=0, Total=31862 [2022-12-14 13:09:06,558 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 64 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-12-14 13:09:06,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 63 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-12-14 13:09:06,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-12-14 13:09:06,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2022-12-14 13:09:06,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0130718954248366) internal successors, (155), 153 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:09:06,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2022-12-14 13:09:06,576 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 136 [2022-12-14 13:09:06,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:09:06,577 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2022-12-14 13:09:06,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 1.1006711409395973) internal successors, (164), 149 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:09:06,577 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2022-12-14 13:09:06,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-12-14 13:09:06,578 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:09:06,578 INFO L195 NwaCegarLoop]: trace histogram [115, 16, 15, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:09:06,583 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 13:09:06,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 13:09:06,780 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:09:06,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:09:06,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1514277816, now seen corresponding path program 9 times [2022-12-14 13:09:06,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:09:06,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537880866] [2022-12-14 13:09:06,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:09:06,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:09:06,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:09:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6910 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-12-14 13:09:12,048 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:09:12,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537880866] [2022-12-14 13:09:12,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537880866] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:09:12,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83473558] [2022-12-14 13:09:12,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:09:12,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:09:12,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:09:12,050 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:09:12,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 13:09:12,275 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:09:12,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:09:12,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 117 conjunts are in the unsatisfiable core [2022-12-14 13:09:12,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:09:12,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6910 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-12-14 13:09:12,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:09:22,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6910 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-12-14 13:09:22,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83473558] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:09:22,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [722002982] [2022-12-14 13:09:22,882 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:09:22,882 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:09:22,882 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:09:22,882 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:09:22,882 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:09:22,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:22,898 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:09:22,898 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 13:09:22,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:22,913 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:09:22,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 13:09:22,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:22,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 13:09:22,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:22,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:09:22,964 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 13:09:22,964 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 196 treesize of output 184 [2022-12-14 13:09:22,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:09:22,997 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:09:23,024 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:09:23,602 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6133#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~marker~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~pos~0#1| 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~pos~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~marker~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:09:23,602 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:09:23,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:09:23,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117, 117] total 233 [2022-12-14 13:09:23,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963317147] [2022-12-14 13:09:23,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:09:23,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 234 states [2022-12-14 13:09:23,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:09:23,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 234 interpolants. [2022-12-14 13:09:23,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27293, Invalid=30547, Unknown=0, NotChecked=0, Total=57840 [2022-12-14 13:09:23,616 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand has 234 states, 234 states have (on average 1.0299145299145298) internal successors, (241), 233 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:09:24,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:09:24,039 INFO L93 Difference]: Finished difference Result 308 states and 426 transitions. [2022-12-14 13:09:24,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2022-12-14 13:09:24,040 INFO L78 Accepts]: Start accepts. Automaton has has 234 states, 234 states have (on average 1.0299145299145298) internal successors, (241), 233 states have internal predecessors, (241), 0 states have call successors, (0), 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 153 [2022-12-14 13:09:24,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:09:24,041 INFO L225 Difference]: With dead ends: 308 [2022-12-14 13:09:24,041 INFO L226 Difference]: Without dead ends: 271 [2022-12-14 13:09:24,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2425 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=27293, Invalid=30547, Unknown=0, NotChecked=0, Total=57840 [2022-12-14 13:09:24,043 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 13:09:24,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 13:09:24,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-12-14 13:09:24,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 271. [2022-12-14 13:09:24,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.0074074074074073) internal successors, (272), 270 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:09:24,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2022-12-14 13:09:24,071 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 153 [2022-12-14 13:09:24,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:09:24,071 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2022-12-14 13:09:24,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 234 states, 234 states have (on average 1.0299145299145298) internal successors, (241), 233 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:09:24,072 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2022-12-14 13:09:24,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-12-14 13:09:24,074 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:09:24,074 INFO L195 NwaCegarLoop]: trace histogram [232, 16, 15, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:09:24,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 13:09:24,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-12-14 13:09:24,276 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:09:24,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:09:24,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1976752027, now seen corresponding path program 10 times [2022-12-14 13:09:24,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:09:24,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972532538] [2022-12-14 13:09:24,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:09:24,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:09:24,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:09:45,854 INFO L134 CoverageAnalysis]: Checked inductivity of 27268 backedges. 0 proven. 27028 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-12-14 13:09:45,854 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:09:45,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972532538] [2022-12-14 13:09:45,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972532538] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:09:45,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429626516] [2022-12-14 13:09:45,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 13:09:45,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:09:45,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:09:45,855 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:09:45,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 13:09:46,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:09:46,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 2222 conjuncts, 234 conjunts are in the unsatisfiable core [2022-12-14 13:09:46,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:09:46,438 INFO L134 CoverageAnalysis]: Checked inductivity of 27268 backedges. 0 proven. 27028 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-12-14 13:09:46,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:10:27,843 INFO L134 CoverageAnalysis]: Checked inductivity of 27268 backedges. 0 proven. 27028 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-12-14 13:10:27,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429626516] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:10:27,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [723633851] [2022-12-14 13:10:27,844 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:10:27,844 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:10:27,844 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:10:27,845 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:10:27,845 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:10:27,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:10:27,858 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-12-14 13:10:27,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 26 [2022-12-14 13:10:27,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:10:27,874 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:10:27,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 13:10:27,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:10:27,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 13:10:27,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:10:27,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:10:27,921 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 13:10:27,921 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 196 treesize of output 184 [2022-12-14 13:10:27,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:10:27,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:10:27,988 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:10:29,019 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9315#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~marker~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~pos~0#1| 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~pos~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~marker~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:10:29,019 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:10:29,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:10:29,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [234, 234, 234] total 467 [2022-12-14 13:10:29,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473038267] [2022-12-14 13:10:29,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:10:29,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 468 states [2022-12-14 13:10:29,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:10:29,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 468 interpolants. [2022-12-14 13:10:29,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109310, Invalid=115840, Unknown=0, NotChecked=0, Total=225150 [2022-12-14 13:10:29,048 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand has 468 states, 468 states have (on average 1.014957264957265) internal successors, (475), 467 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:10:31,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:10:31,448 INFO L93 Difference]: Finished difference Result 542 states and 777 transitions. [2022-12-14 13:10:31,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 468 states. [2022-12-14 13:10:31,449 INFO L78 Accepts]: Start accepts. Automaton has has 468 states, 468 states have (on average 1.014957264957265) internal successors, (475), 467 states have internal predecessors, (475), 0 states have call successors, (0), 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 270 [2022-12-14 13:10:31,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:10:31,450 INFO L225 Difference]: With dead ends: 542 [2022-12-14 13:10:31,450 INFO L226 Difference]: Without dead ends: 505 [2022-12-14 13:10:31,459 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1042 GetRequests, 569 SyntacticMatches, 0 SemanticMatches, 473 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4882 ImplicationChecksByTransitivity, 54.9s TimeCoverageRelationStatistics Valid=109310, Invalid=115840, Unknown=0, NotChecked=0, Total=225150 [2022-12-14 13:10:31,459 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 13:10:31,460 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 13:10:31,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2022-12-14 13:10:31,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 505. [2022-12-14 13:10:31,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 1.003968253968254) internal successors, (506), 504 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:10:31,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 506 transitions. [2022-12-14 13:10:31,507 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 506 transitions. Word has length 270 [2022-12-14 13:10:31,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:10:31,507 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 506 transitions. [2022-12-14 13:10:31,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 468 states, 468 states have (on average 1.014957264957265) internal successors, (475), 467 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:10:31,508 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 506 transitions. [2022-12-14 13:10:31,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2022-12-14 13:10:31,514 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:10:31,514 INFO L195 NwaCegarLoop]: trace histogram [466, 16, 15, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:10:31,521 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 13:10:31,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 13:10:31,716 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:10:31,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:10:31,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1805827515, now seen corresponding path program 11 times [2022-12-14 13:10:31,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:10:31,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763162427] [2022-12-14 13:10:31,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:10:31,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:10:32,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:12:13,122 INFO L134 CoverageAnalysis]: Checked inductivity of 109051 backedges. 0 proven. 108811 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-12-14 13:12:13,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:12:13,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763162427] [2022-12-14 13:12:13,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763162427] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:12:13,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643390643] [2022-12-14 13:12:13,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 13:12:13,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:12:13,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:12:13,123 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:12:13,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 13:12:24,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-12-14 13:12:24,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:12:24,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 118 conjunts are in the unsatisfiable core [2022-12-14 13:12:24,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:12:24,631 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:12:35,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:35,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:35,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:35,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:35,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:35,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:35,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:35,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:35,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:35,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:35,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:35,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:35,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:35,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:35,336 INFO L321 Elim1Store]: treesize reduction 56, result has 63.4 percent of original size [2022-12-14 13:12:35,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 105 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 131 treesize of output 159 [2022-12-14 13:12:36,248 WARN L718 sPolynomialRelations]: Constructing 32768(two to the power of 15 dual juncts. [2022-12-14 13:12:37,165 INFO L134 CoverageAnalysis]: Checked inductivity of 109051 backedges. 0 proven. 3940 refuted. 0 times theorem prover too weak. 105111 trivial. 0 not checked. [2022-12-14 13:12:37,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:12:49,488 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 209 [2022-12-14 13:12:49,499 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-12-14 13:12:49,499 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 284 treesize of output 1 [2022-12-14 13:12:49,507 INFO L134 CoverageAnalysis]: Checked inductivity of 109051 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 108811 trivial. 0 not checked. [2022-12-14 13:12:49,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643390643] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:12:49,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [928808726] [2022-12-14 13:12:49,508 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:12:49,508 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:12:49,509 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:12:49,509 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:12:49,509 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:12:49,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:49,525 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:12:49,525 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 13:12:49,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:49,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 13:12:49,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:49,543 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 13:12:49,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:12:49,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 13:12:49,591 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 13:12:49,591 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 186 treesize of output 185 [2022-12-14 13:12:49,636 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:12:49,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:12:49,676 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:12:51,873 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14911#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~marker~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~pos~0#1| 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~pos~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~marker~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:12:51,873 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:12:51,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:12:51,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [468, 42, 34] total 542 [2022-12-14 13:12:51,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141686842] [2022-12-14 13:12:51,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:12:51,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 542 states [2022-12-14 13:12:51,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:12:51,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 542 interpolants. [2022-12-14 13:12:51,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114413, Invalid=186439, Unknown=0, NotChecked=0, Total=300852 [2022-12-14 13:12:51,902 INFO L87 Difference]: Start difference. First operand 505 states and 506 transitions. Second operand has 542 states, 542 states have (on average 1.0313653136531364) internal successors, (559), 542 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:14:56,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:14:56,019 INFO L93 Difference]: Finished difference Result 607 states and 625 transitions. [2022-12-14 13:14:56,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 547 states. [2022-12-14 13:14:56,019 INFO L78 Accepts]: Start accepts. Automaton has has 542 states, 542 states have (on average 1.0313653136531364) internal successors, (559), 542 states have internal predecessors, (559), 0 states have call successors, (0), 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 504 [2022-12-14 13:14:56,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:14:56,021 INFO L225 Difference]: With dead ends: 607 [2022-12-14 13:14:56,021 INFO L226 Difference]: Without dead ends: 538 [2022-12-14 13:14:56,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2485 GetRequests, 1431 SyntacticMatches, 0 SemanticMatches, 1054 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186496 ImplicationChecksByTransitivity, 198.8s TimeCoverageRelationStatistics Valid=332158, Invalid=781922, Unknown=0, NotChecked=0, Total=1114080 [2022-12-14 13:14:56,079 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 458 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2155 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 2171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-12-14 13:14:56,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 84 Invalid, 2171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2155 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-12-14 13:14:56,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-12-14 13:14:56,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 538. [2022-12-14 13:14:56,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 1.0037243947858474) internal successors, (539), 537 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:14:56,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 539 transitions. [2022-12-14 13:14:56,136 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 539 transitions. Word has length 504 [2022-12-14 13:14:56,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:14:56,136 INFO L495 AbstractCegarLoop]: Abstraction has 538 states and 539 transitions. [2022-12-14 13:14:56,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 542 states, 542 states have (on average 1.0313653136531364) internal successors, (559), 542 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:14:56,137 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 539 transitions. [2022-12-14 13:14:56,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2022-12-14 13:14:56,139 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:14:56,139 INFO L195 NwaCegarLoop]: trace histogram [467, 32, 31, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:14:56,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-12-14 13:14:56,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 13:14:56,341 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:14:56,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:14:56,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1325596824, now seen corresponding path program 12 times [2022-12-14 13:14:56,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:14:56,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318763892] [2022-12-14 13:14:56,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:14:56,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:14:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 13:16:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 110270 backedges. 0 proven. 109278 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2022-12-14 13:16:33,123 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 13:16:33,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318763892] [2022-12-14 13:16:33,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318763892] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 13:16:33,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500079124] [2022-12-14 13:16:33,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 13:16:33,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:16:33,124 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 13:16:33,125 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 13:16:33,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 13:16:33,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 13:16:33,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 13:16:33,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 4417 conjuncts, 469 conjunts are in the unsatisfiable core [2022-12-14 13:16:33,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 13:16:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 110270 backedges. 0 proven. 109278 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2022-12-14 13:16:34,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 13:19:20,510 INFO L134 CoverageAnalysis]: Checked inductivity of 110270 backedges. 0 proven. 109278 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2022-12-14 13:19:20,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500079124] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 13:19:20,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1681984321] [2022-12-14 13:19:20,512 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2022-12-14 13:19:20,512 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 13:19:20,512 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 13:19:20,512 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 13:19:20,512 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 13:19:20,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:19:20,531 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-12-14 13:19:20,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 37 [2022-12-14 13:19:20,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:19:20,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2022-12-14 13:19:20,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:19:20,552 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 13:19:20,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:19:20,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 13:19:20,588 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 13:19:20,588 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 196 treesize of output 184 [2022-12-14 13:19:20,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-12-14 13:19:20,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-12-14 13:19:20,655 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 13:19:22,733 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22247#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 (+ |ULTIMATE.start_main_~marker~0#1| 2147483648)) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (<= |ULTIMATE.start_main_~pos~0#1| 100000) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (<= 0 |ULTIMATE.start_main_~pos~0#1|) (= (ite (<= |ULTIMATE.start_main_~i~1#1| |ULTIMATE.start_main_~pos~0#1|) 1 0) |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start_main_~marker~0#1| (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) (+ |ULTIMATE.start_main_~#a~0#1.offset| (* |ULTIMATE.start_main_~i~1#1| 4)))) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (<= |ULTIMATE.start_main_~marker~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 13:19:22,733 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 13:19:22,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 13:19:22,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [469, 469, 469] total 937 [2022-12-14 13:19:22,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146729161] [2022-12-14 13:19:22,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 13:19:22,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 938 states [2022-12-14 13:19:22,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 13:19:22,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 938 interpolants. [2022-12-14 13:19:22,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439485, Invalid=452595, Unknown=0, NotChecked=0, Total=892080 [2022-12-14 13:19:22,865 INFO L87 Difference]: Start difference. First operand 538 states and 539 transitions. Second operand has 938 states, 938 states have (on average 1.007462686567164) internal successors, (945), 937 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:19:41,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 13:19:41,189 INFO L93 Difference]: Finished difference Result 1076 states and 1546 transitions. [2022-12-14 13:19:41,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 938 states. [2022-12-14 13:19:41,191 INFO L78 Accepts]: Start accepts. Automaton has has 938 states, 938 states have (on average 1.007462686567164) internal successors, (945), 937 states have internal predecessors, (945), 0 states have call successors, (0), 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 537 [2022-12-14 13:19:41,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 13:19:41,194 INFO L225 Difference]: With dead ends: 1076 [2022-12-14 13:19:41,194 INFO L226 Difference]: Without dead ends: 1007 [2022-12-14 13:19:41,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2078 GetRequests, 1135 SyntacticMatches, 0 SemanticMatches, 943 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9817 ImplicationChecksByTransitivity, 218.2s TimeCoverageRelationStatistics Valid=439485, Invalid=452595, Unknown=0, NotChecked=0, Total=892080 [2022-12-14 13:19:41,237 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-12-14 13:19:41,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-12-14 13:19:41,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2022-12-14 13:19:41,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 1007. [2022-12-14 13:19:41,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 1006 states have (on average 1.0019880715705765) internal successors, (1008), 1006 states have internal predecessors, (1008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:19:41,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 1008 transitions. [2022-12-14 13:19:41,337 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 1008 transitions. Word has length 537 [2022-12-14 13:19:41,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 13:19:41,337 INFO L495 AbstractCegarLoop]: Abstraction has 1007 states and 1008 transitions. [2022-12-14 13:19:41,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 938 states, 938 states have (on average 1.007462686567164) internal successors, (945), 937 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 13:19:41,338 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 1008 transitions. [2022-12-14 13:19:41,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1007 [2022-12-14 13:19:41,344 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 13:19:41,345 INFO L195 NwaCegarLoop]: trace histogram [936, 32, 31, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 13:19:41,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 13:19:41,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e80e2fc-3402-4d01-b791-5b41ba483aab/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 13:19:41,547 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 13:19:41,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 13:19:41,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1991553515, now seen corresponding path program 13 times [2022-12-14 13:19:41,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 13:19:41,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405017930] [2022-12-14 13:19:41,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 13:19:41,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 13:19:45,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat