./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-examples/standard_running-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_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/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_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-examples/standard_running-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/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_d08c08a1-3964-4511-8113-3ef51a9a50d7/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 b155d36c818668577415bbab4913364c1907de6bd1c1c9e0d185f4f2f125b180 --- 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 08:08:01,505 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 08:08:01,507 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 08:08:01,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 08:08:01,527 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 08:08:01,528 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 08:08:01,530 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 08:08:01,531 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 08:08:01,533 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 08:08:01,534 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 08:08:01,535 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 08:08:01,536 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 08:08:01,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 08:08:01,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 08:08:01,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 08:08:01,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 08:08:01,541 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 08:08:01,542 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 08:08:01,543 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 08:08:01,545 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 08:08:01,547 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 08:08:01,548 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 08:08:01,549 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 08:08:01,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 08:08:01,554 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 08:08:01,554 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 08:08:01,555 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 08:08:01,556 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 08:08:01,556 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 08:08:01,557 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 08:08:01,557 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 08:08:01,558 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 08:08:01,559 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 08:08:01,560 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 08:08:01,561 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 08:08:01,561 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 08:08:01,562 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 08:08:01,562 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 08:08:01,562 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 08:08:01,563 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 08:08:01,564 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 08:08:01,564 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 08:08:01,586 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 08:08:01,586 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 08:08:01,587 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 08:08:01,587 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 08:08:01,587 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 08:08:01,588 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 08:08:01,588 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 08:08:01,588 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 08:08:01,588 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 08:08:01,588 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 08:08:01,589 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 08:08:01,589 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 08:08:01,589 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 08:08:01,589 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 08:08:01,589 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 08:08:01,590 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 08:08:01,590 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 08:08:01,590 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 08:08:01,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 08:08:01,591 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 08:08:01,591 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 08:08:01,591 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 08:08:01,591 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 08:08:01,591 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 08:08:01,591 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 08:08:01,592 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 08:08:01,592 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 08:08:01,592 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 08:08:01,592 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 08:08:01,592 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 08:08:01,593 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 08:08:01,593 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 08:08:01,593 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:08:01,593 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 08:08:01,593 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 08:08:01,593 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 08:08:01,593 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 08:08:01,593 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 08:08:01,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 08:08:01,594 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 08:08:01,594 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 08:08:01,594 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_d08c08a1-3964-4511-8113-3ef51a9a50d7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b155d36c818668577415bbab4913364c1907de6bd1c1c9e0d185f4f2f125b180 [2022-12-14 08:08:01,768 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 08:08:01,785 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 08:08:01,787 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 08:08:01,788 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 08:08:01,788 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 08:08:01,789 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/array-examples/standard_running-2.i [2022-12-14 08:08:04,319 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 08:08:04,521 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 08:08:04,521 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/sv-benchmarks/c/array-examples/standard_running-2.i [2022-12-14 08:08:04,527 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/data/89465acca/06898ae2c8b5474b948f2c42587d6cd9/FLAGe2d2aa26a [2022-12-14 08:08:04,922 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/data/89465acca/06898ae2c8b5474b948f2c42587d6cd9 [2022-12-14 08:08:04,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 08:08:04,926 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 08:08:04,927 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 08:08:04,927 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 08:08:04,930 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 08:08:04,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:08:04" (1/1) ... [2022-12-14 08:08:04,931 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b763f12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:04, skipping insertion in model container [2022-12-14 08:08:04,932 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 08:08:04" (1/1) ... [2022-12-14 08:08:04,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 08:08:04,949 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 08:08:05,043 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_d08c08a1-3964-4511-8113-3ef51a9a50d7/sv-benchmarks/c/array-examples/standard_running-2.i[811,824] [2022-12-14 08:08:05,054 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:08:05,060 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 08:08:05,069 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_d08c08a1-3964-4511-8113-3ef51a9a50d7/sv-benchmarks/c/array-examples/standard_running-2.i[811,824] [2022-12-14 08:08:05,074 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 08:08:05,083 INFO L208 MainTranslator]: Completed translation [2022-12-14 08:08:05,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:05 WrapperNode [2022-12-14 08:08:05,084 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 08:08:05,085 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 08:08:05,085 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 08:08:05,085 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 08:08:05,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:05" (1/1) ... [2022-12-14 08:08:05,095 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:05" (1/1) ... [2022-12-14 08:08:05,108 INFO L138 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2022-12-14 08:08:05,108 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 08:08:05,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 08:08:05,109 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 08:08:05,109 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 08:08:05,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:05" (1/1) ... [2022-12-14 08:08:05,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:05" (1/1) ... [2022-12-14 08:08:05,116 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:05" (1/1) ... [2022-12-14 08:08:05,116 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:05" (1/1) ... [2022-12-14 08:08:05,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:05" (1/1) ... [2022-12-14 08:08:05,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:05" (1/1) ... [2022-12-14 08:08:05,123 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:05" (1/1) ... [2022-12-14 08:08:05,124 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:05" (1/1) ... [2022-12-14 08:08:05,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 08:08:05,125 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 08:08:05,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 08:08:05,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 08:08:05,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:05" (1/1) ... [2022-12-14 08:08:05,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 08:08:05,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:08:05,148 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 08:08:05,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 08:08:05,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 08:08:05,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 08:08:05,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 08:08:05,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 08:08:05,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 08:08:05,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 08:08:05,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 08:08:05,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 08:08:05,235 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 08:08:05,236 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 08:08:05,334 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 08:08:05,400 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 08:08:05,400 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-12-14 08:08:05,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:08:05 BoogieIcfgContainer [2022-12-14 08:08:05,402 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 08:08:05,403 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 08:08:05,404 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 08:08:05,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 08:08:05,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 08:08:04" (1/3) ... [2022-12-14 08:08:05,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f34d6b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:08:05, skipping insertion in model container [2022-12-14 08:08:05,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 08:08:05" (2/3) ... [2022-12-14 08:08:05,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f34d6b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 08:08:05, skipping insertion in model container [2022-12-14 08:08:05,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 08:08:05" (3/3) ... [2022-12-14 08:08:05,408 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_running-2.i [2022-12-14 08:08:05,423 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 08:08:05,423 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 08:08:05,457 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 08:08:05,462 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;@9c95724, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 08:08:05,462 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-14 08:08:05,465 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:08:05,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 08:08:05,469 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:08:05,469 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-14 08:08:05,470 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:08:05,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:08:05,474 INFO L85 PathProgramCache]: Analyzing trace with hash -712228024, now seen corresponding path program 1 times [2022-12-14 08:08:05,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:08:05,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675934911] [2022-12-14 08:08:05,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:08:05,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:08:05,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:08:05,619 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 08:08:05,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:08:05,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675934911] [2022-12-14 08:08:05,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675934911] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 08:08:05,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 08:08:05,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 08:08:05,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966456943] [2022-12-14 08:08:05,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 08:08:05,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 08:08:05,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:08:05,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 08:08:05,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 08:08:05,652 INFO L87 Difference]: Start difference. First operand has 9 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:08:05,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:08:05,712 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2022-12-14 08:08:05,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 08:08:05,714 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2022-12-14 08:08:05,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:08:05,720 INFO L225 Difference]: With dead ends: 19 [2022-12-14 08:08:05,720 INFO L226 Difference]: Without dead ends: 10 [2022-12-14 08:08:05,723 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 08:08:05,727 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:08:05,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:08:05,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-12-14 08:08:05,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-12-14 08:08:05,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:08:05,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 12 transitions. [2022-12-14 08:08:05,755 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 12 transitions. Word has length 6 [2022-12-14 08:08:05,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:08:05,756 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 12 transitions. [2022-12-14 08:08:05,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:08:05,756 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 12 transitions. [2022-12-14 08:08:05,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 08:08:05,757 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:08:05,757 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 08:08:05,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 08:08:05,757 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:08:05,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:08:05,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1169555712, now seen corresponding path program 1 times [2022-12-14 08:08:05,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:08:05,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082578750] [2022-12-14 08:08:05,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:08:05,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:08:05,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:08:05,868 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 08:08:05,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:08:05,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082578750] [2022-12-14 08:08:05,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082578750] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:08:05,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090325237] [2022-12-14 08:08:05,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:08:05,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:08:05,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:08:05,870 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:08:05,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 08:08:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:08:05,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-14 08:08:05,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:08:05,973 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 08:08:05,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:08:05,990 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 08:08:05,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090325237] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:08:05,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1280638524] [2022-12-14 08:08:06,006 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 08:08:06,006 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:08:06,009 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:08:06,014 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:08:06,014 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:08:06,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:08:06,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:08:06,122 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 08:08:06,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 08:08:06,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:08:06,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:08:06,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 8 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 27 [2022-12-14 08:08:06,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:08:06,184 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 08:08:06,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:08:06,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:08:06,306 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 08:08:06,307 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 242 treesize of output 241 [2022-12-14 08:08:06,437 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 08:08:06,455 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:08:06,465 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 08:08:06,465 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2022-12-14 08:08:06,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:08:06,489 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 08:08:06,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2022-12-14 08:08:06,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:08:06,541 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 08:08:06,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2022-12-14 08:08:06,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:08:06,567 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 08:08:06,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2022-12-14 08:08:06,835 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:08:06,975 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '115#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~f~0#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:08:06,976 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:08:06,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:08:06,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-14 08:08:06,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391739469] [2022-12-14 08:08:06,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:08:06,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-14 08:08:06,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:08:06,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-14 08:08:06,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:08:06,979 INFO L87 Difference]: Start difference. First operand 10 states and 12 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 08:08:07,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:08:07,026 INFO L93 Difference]: Finished difference Result 26 states and 38 transitions. [2022-12-14 08:08:07,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 08:08:07,027 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 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 08:08:07,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:08:07,028 INFO L225 Difference]: With dead ends: 26 [2022-12-14 08:08:07,028 INFO L226 Difference]: Without dead ends: 19 [2022-12-14 08:08:07,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-12-14 08:08:07,030 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:08:07,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 08:08:07,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-12-14 08:08:07,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-12-14 08:08:07,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 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 08:08:07,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-12-14 08:08:07,034 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 9 [2022-12-14 08:08:07,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:08:07,034 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-12-14 08:08:07,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 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 08:08:07,035 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-12-14 08:08:07,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 08:08:07,035 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:08:07,035 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-14 08:08:07,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 08:08:07,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:08:07,238 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:08:07,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:08:07,240 INFO L85 PathProgramCache]: Analyzing trace with hash 2073994696, now seen corresponding path program 2 times [2022-12-14 08:08:07,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:08:07,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195001684] [2022-12-14 08:08:07,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:08:07,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:08:07,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:08:07,500 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 08:08:07,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:08:07,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195001684] [2022-12-14 08:08:07,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195001684] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:08:07,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842631245] [2022-12-14 08:08:07,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:08:07,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:08:07,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:08:07,502 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:08:07,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 08:08:07,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-12-14 08:08:07,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:08:07,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 08:08:07,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:08:07,599 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 08:08:07,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:08:07,640 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-12-14 08:08:07,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842631245] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:08:07,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [377213724] [2022-12-14 08:08:07,642 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 08:08:07,642 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:08:07,643 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:08:07,643 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:08:07,643 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:08:07,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:08:07,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:08:07,676 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 08:08:07,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-12-14 08:08:07,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:08:07,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:08:07,713 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 08:08:07,713 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 08:08:07,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:08:07,737 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 08:08:07,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:08:07,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:08:07,808 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 08:08:07,809 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 252 treesize of output 240 [2022-12-14 08:08:07,853 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 08:08:07,875 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 08:08:07,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2022-12-14 08:08:07,890 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 08:08:07,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 23 [2022-12-14 08:08:07,909 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:08:07,918 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 08:08:07,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2022-12-14 08:08:07,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:08:07,937 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 08:08:07,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2022-12-14 08:08:08,144 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:08:08,278 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '313#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~f~0#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:08:08,278 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:08:08,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:08:08,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-14 08:08:08,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110771306] [2022-12-14 08:08:08,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:08:08,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 08:08:08,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:08:08,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 08:08:08,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-12-14 08:08:08,280 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:08:08,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:08:08,356 INFO L93 Difference]: Finished difference Result 50 states and 71 transitions. [2022-12-14 08:08:08,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-14 08:08:08,357 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-12-14 08:08:08,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:08:08,358 INFO L225 Difference]: With dead ends: 50 [2022-12-14 08:08:08,358 INFO L226 Difference]: Without dead ends: 37 [2022-12-14 08:08:08,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2022-12-14 08:08:08,359 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:08:08,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:08:08,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-12-14 08:08:08,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-12-14 08:08:08,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:08:08,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-12-14 08:08:08,363 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 18 [2022-12-14 08:08:08,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:08:08,363 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-12-14 08:08:08,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:08:08,364 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-12-14 08:08:08,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 08:08:08,364 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:08:08,364 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1] [2022-12-14 08:08:08,369 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 08:08:08,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-14 08:08:08,566 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:08:08,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:08:08,568 INFO L85 PathProgramCache]: Analyzing trace with hash 82823560, now seen corresponding path program 3 times [2022-12-14 08:08:08,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:08:08,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842667963] [2022-12-14 08:08:08,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:08:08,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:08:08,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:08:09,007 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-12-14 08:08:09,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:08:09,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842667963] [2022-12-14 08:08:09,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842667963] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:08:09,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745250520] [2022-12-14 08:08:09,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:08:09,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:08:09,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:08:09,009 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:08:09,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 08:08:09,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:08:09,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:08:09,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 12 conjunts are in the unsatisfiable core [2022-12-14 08:08:09,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:08:09,142 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-12-14 08:08:09,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:08:09,283 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-12-14 08:08:09,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745250520] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:08:09,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1577363801] [2022-12-14 08:08:09,285 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 08:08:09,285 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:08:09,285 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:08:09,285 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:08:09,285 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:08:09,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:08:09,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:08:09,319 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 08:08:09,320 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-12-14 08:08:09,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:08:09,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:08:09,356 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 08:08:09,356 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 08:08:09,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:08:09,372 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 08:08:09,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:08:09,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:08:09,419 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 08:08:09,419 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 252 treesize of output 240 [2022-12-14 08:08:09,469 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 08:08:09,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:08:09,495 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 08:08:09,496 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2022-12-14 08:08:09,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:08:09,516 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 08:08:09,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2022-12-14 08:08:09,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:08:09,548 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 08:08:09,549 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2022-12-14 08:08:09,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:08:09,568 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 08:08:09,568 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2022-12-14 08:08:09,724 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:08:09,860 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '715#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~f~0#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:08:09,860 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:08:09,860 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:08:09,860 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-12-14 08:08:09,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323741495] [2022-12-14 08:08:09,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:08:09,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-14 08:08:09,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:08:09,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-14 08:08:09,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2022-12-14 08:08:09,863 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 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 08:08:10,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:08:10,022 INFO L93 Difference]: Finished difference Result 98 states and 137 transitions. [2022-12-14 08:08:10,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-12-14 08:08:10,023 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 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 36 [2022-12-14 08:08:10,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:08:10,024 INFO L225 Difference]: With dead ends: 98 [2022-12-14 08:08:10,024 INFO L226 Difference]: Without dead ends: 73 [2022-12-14 08:08:10,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=314, Invalid=498, Unknown=0, NotChecked=0, Total=812 [2022-12-14 08:08:10,025 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 08:08:10,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 08:08:10,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-12-14 08:08:10,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-12-14 08:08:10,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:08:10,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2022-12-14 08:08:10,035 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 36 [2022-12-14 08:08:10,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:08:10,036 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2022-12-14 08:08:10,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 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 08:08:10,036 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2022-12-14 08:08:10,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-12-14 08:08:10,038 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:08:10,038 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1] [2022-12-14 08:08:10,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 08:08:10,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:08:10,240 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:08:10,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:08:10,241 INFO L85 PathProgramCache]: Analyzing trace with hash -2041073400, now seen corresponding path program 4 times [2022-12-14 08:08:10,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:08:10,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125545724] [2022-12-14 08:08:10,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:08:10,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:08:10,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:08:11,105 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-12-14 08:08:11,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:08:11,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125545724] [2022-12-14 08:08:11,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125545724] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:08:11,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847637653] [2022-12-14 08:08:11,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 08:08:11,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:08:11,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:08:11,107 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:08:11,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 08:08:11,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:08:11,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 679 conjuncts, 24 conjunts are in the unsatisfiable core [2022-12-14 08:08:11,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:08:11,300 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-12-14 08:08:11,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:08:11,714 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-12-14 08:08:11,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847637653] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:08:11,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1399849528] [2022-12-14 08:08:11,715 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 08:08:11,715 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:08:11,716 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:08:11,716 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:08:11,716 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:08:11,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:08:11,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:08:11,743 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 08:08:11,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-12-14 08:08:11,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:08:11,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:08:11,774 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 08:08:11,774 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 08:08:11,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:08:11,788 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 08:08:11,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:08:11,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:08:11,846 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 08:08:11,847 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 242 treesize of output 241 [2022-12-14 08:08:11,900 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 08:08:11,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:08:11,916 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 08:08:11,916 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2022-12-14 08:08:11,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:08:11,929 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 08:08:11,929 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2022-12-14 08:08:11,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:08:11,952 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 08:08:11,952 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2022-12-14 08:08:11,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:08:11,965 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 08:08:11,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2022-12-14 08:08:12,227 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:08:12,856 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1525#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~f~0#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:08:12,856 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:08:12,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:08:12,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2022-12-14 08:08:12,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808230360] [2022-12-14 08:08:12,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:08:12,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-12-14 08:08:12,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:08:12,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-12-14 08:08:12,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 08:08:12,859 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 08:08:13,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:08:13,187 INFO L93 Difference]: Finished difference Result 194 states and 269 transitions. [2022-12-14 08:08:13,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-12-14 08:08:13,187 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 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 72 [2022-12-14 08:08:13,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:08:13,188 INFO L225 Difference]: With dead ends: 194 [2022-12-14 08:08:13,188 INFO L226 Difference]: Without dead ends: 145 [2022-12-14 08:08:13,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 164 SyntacticMatches, 23 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1951 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1190, Invalid=1566, Unknown=0, NotChecked=0, Total=2756 [2022-12-14 08:08:13,189 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 08:08:13,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 8 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 08:08:13,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-12-14 08:08:13,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-12-14 08:08:13,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0208333333333333) internal successors, (147), 144 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:08:13,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2022-12-14 08:08:13,198 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 72 [2022-12-14 08:08:13,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:08:13,198 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2022-12-14 08:08:13,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 48 states have internal predecessors, (56), 0 states have call successors, (0), 0 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 08:08:13,198 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2022-12-14 08:08:13,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-12-14 08:08:13,200 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:08:13,200 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1] [2022-12-14 08:08:13,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 08:08:13,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:08:13,402 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:08:13,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:08:13,403 INFO L85 PathProgramCache]: Analyzing trace with hash 928907272, now seen corresponding path program 5 times [2022-12-14 08:08:13,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:08:13,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205299113] [2022-12-14 08:08:13,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:08:13,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:08:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:08:15,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2022-12-14 08:08:15,464 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:08:15,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205299113] [2022-12-14 08:08:15,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205299113] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:08:15,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833379911] [2022-12-14 08:08:15,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:08:15,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:08:15,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:08:15,466 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:08:15,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 08:16:39,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2022-12-14 08:16:39,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:16:39,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 1351 conjuncts, 48 conjunts are in the unsatisfiable core [2022-12-14 08:16:39,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:16:39,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2022-12-14 08:16:39,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:16:40,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2022-12-14 08:16:40,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833379911] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:16:40,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [487755695] [2022-12-14 08:16:40,891 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 08:16:40,891 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:16:40,891 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:16:40,891 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:16:40,891 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:16:40,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:40,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:40,920 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 08:16:40,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-12-14 08:16:40,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:40,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:40,955 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 08:16:40,956 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 08:16:40,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:40,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 08:16:41,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:41,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:16:41,026 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 08:16:41,026 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 242 treesize of output 241 [2022-12-14 08:16:41,093 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 08:16:41,111 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 08:16:41,112 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 22 [2022-12-14 08:16:41,128 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-12-14 08:16:41,128 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 23 [2022-12-14 08:16:41,148 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:16:41,158 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 08:16:41,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2022-12-14 08:16:41,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:16:41,178 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 08:16:41,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2022-12-14 08:16:41,444 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:16:42,985 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3151#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~f~0#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:16:42,985 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:16:42,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:16:42,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49, 49] total 97 [2022-12-14 08:16:42,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641587982] [2022-12-14 08:16:42,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:16:42,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-12-14 08:16:42,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:16:42,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-12-14 08:16:42,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4670, Invalid=5430, Unknown=0, NotChecked=0, Total=10100 [2022-12-14 08:16:42,994 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand has 97 states, 97 states have (on average 1.5876288659793814) internal successors, (154), 97 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:43,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:16:43,908 INFO L93 Difference]: Finished difference Result 386 states and 533 transitions. [2022-12-14 08:16:43,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-12-14 08:16:43,908 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.5876288659793814) internal successors, (154), 97 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2022-12-14 08:16:43,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:16:43,911 INFO L225 Difference]: With dead ends: 386 [2022-12-14 08:16:43,911 INFO L226 Difference]: Without dead ends: 289 [2022-12-14 08:16:43,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 332 SyntacticMatches, 47 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7375 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4670, Invalid=5430, Unknown=0, NotChecked=0, Total=10100 [2022-12-14 08:16:43,913 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 528 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 528 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:16:43,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [528 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 08:16:43,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2022-12-14 08:16:43,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 289. [2022-12-14 08:16:43,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.0104166666666667) internal successors, (291), 288 states have internal predecessors, (291), 0 states have call successors, (0), 0 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 08:16:43,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 291 transitions. [2022-12-14 08:16:43,927 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 291 transitions. Word has length 144 [2022-12-14 08:16:43,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:16:43,927 INFO L495 AbstractCegarLoop]: Abstraction has 289 states and 291 transitions. [2022-12-14 08:16:43,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.5876288659793814) internal successors, (154), 97 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 08:16:43,927 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 291 transitions. [2022-12-14 08:16:43,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2022-12-14 08:16:43,930 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:16:43,930 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 1, 1, 1, 1, 1, 1] [2022-12-14 08:16:43,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 08:16:44,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:16:44,132 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:16:44,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:16:44,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1262788104, now seen corresponding path program 6 times [2022-12-14 08:16:44,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:16:44,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839741588] [2022-12-14 08:16:44,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:16:44,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:16:44,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:16:51,449 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 8930 trivial. 0 not checked. [2022-12-14 08:16:51,449 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:16:51,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839741588] [2022-12-14 08:16:51,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839741588] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:16:51,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634373959] [2022-12-14 08:16:51,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 08:16:51,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:16:51,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:16:51,450 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:16:51,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 08:16:51,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 08:16:51,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 08:16:51,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 2695 conjuncts, 96 conjunts are in the unsatisfiable core [2022-12-14 08:16:52,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:16:52,107 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 8930 trivial. 0 not checked. [2022-12-14 08:16:52,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:16:58,281 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 8930 trivial. 0 not checked. [2022-12-14 08:16:58,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634373959] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:16:58,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1918804154] [2022-12-14 08:16:58,283 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 08:16:58,283 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:16:58,283 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:16:58,283 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:16:58,283 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:16:58,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:58,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:58,309 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 08:16:58,309 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-12-14 08:16:58,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:58,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:58,335 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 08:16:58,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 08:16:58,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:58,349 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 33 [2022-12-14 08:16:58,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:58,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:16:58,387 INFO L321 Elim1Store]: treesize reduction 49, result has 12.5 percent of original size [2022-12-14 08:16:58,388 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 252 treesize of output 240 [2022-12-14 08:16:58,419 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 08:16:58,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:16:58,437 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 08:16:58,437 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2022-12-14 08:16:58,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:16:58,451 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 08:16:58,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2022-12-14 08:16:58,466 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:16:58,473 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 08:16:58,473 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2022-12-14 08:16:58,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:16:58,489 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 08:16:58,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2022-12-14 08:16:58,617 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:16:58,931 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6409#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~f~0#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:16:58,931 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:16:58,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:16:58,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 192 [2022-12-14 08:16:58,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777170819] [2022-12-14 08:16:58,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:16:58,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-12-14 08:16:58,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:16:58,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-12-14 08:16:58,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18542, Invalid=20070, Unknown=0, NotChecked=0, Total=38612 [2022-12-14 08:16:58,941 INFO L87 Difference]: Start difference. First operand 289 states and 291 transitions. Second operand has 193 states, 193 states have (on average 1.0362694300518134) internal successors, (200), 192 states have internal predecessors, (200), 0 states have call successors, (0), 0 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 08:17:06,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:17:06,383 INFO L93 Difference]: Finished difference Result 770 states and 1061 transitions. [2022-12-14 08:17:06,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-12-14 08:17:06,383 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.0362694300518134) internal successors, (200), 192 states have internal predecessors, (200), 0 states have call successors, (0), 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 288 [2022-12-14 08:17:06,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:17:06,385 INFO L225 Difference]: With dead ends: 770 [2022-12-14 08:17:06,385 INFO L226 Difference]: Without dead ends: 577 [2022-12-14 08:17:06,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 763 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=18542, Invalid=20070, Unknown=0, NotChecked=0, Total=38612 [2022-12-14 08:17:06,388 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 1879 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 2462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1879 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-12-14 08:17:06,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 2462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1879 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-12-14 08:17:06,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-12-14 08:17:06,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 577. [2022-12-14 08:17:06,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 1.0052083333333333) internal successors, (579), 576 states have internal predecessors, (579), 0 states have call successors, (0), 0 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 08:17:06,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 579 transitions. [2022-12-14 08:17:06,407 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 579 transitions. Word has length 288 [2022-12-14 08:17:06,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:17:06,407 INFO L495 AbstractCegarLoop]: Abstraction has 577 states and 579 transitions. [2022-12-14 08:17:06,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.0362694300518134) internal successors, (200), 192 states have internal predecessors, (200), 0 states have call successors, (0), 0 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 08:17:06,407 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 579 transitions. [2022-12-14 08:17:06,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 577 [2022-12-14 08:17:06,415 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:17:06,416 INFO L195 NwaCegarLoop]: trace histogram [190, 190, 190, 1, 1, 1, 1, 1, 1] [2022-12-14 08:17:06,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-12-14 08:17:06,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-14 08:17:06,617 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:17:06,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:17:06,618 INFO L85 PathProgramCache]: Analyzing trace with hash 41540104, now seen corresponding path program 7 times [2022-12-14 08:17:06,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:17:06,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677936841] [2022-12-14 08:17:06,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:17:06,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:17:07,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:17:36,177 INFO L134 CoverageAnalysis]: Checked inductivity of 54435 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 36290 trivial. 0 not checked. [2022-12-14 08:17:36,177 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:17:36,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677936841] [2022-12-14 08:17:36,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677936841] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:17:36,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40695198] [2022-12-14 08:17:36,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 08:17:36,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:17:36,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:17:36,178 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:17:36,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 08:17:37,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:17:37,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 5383 conjuncts, 192 conjunts are in the unsatisfiable core [2022-12-14 08:17:37,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 08:17:37,386 INFO L134 CoverageAnalysis]: Checked inductivity of 54435 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 36290 trivial. 0 not checked. [2022-12-14 08:17:37,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 08:18:03,449 INFO L134 CoverageAnalysis]: Checked inductivity of 54435 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 36290 trivial. 0 not checked. [2022-12-14 08:18:03,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40695198] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 08:18:03,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [869571531] [2022-12-14 08:18:03,451 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2022-12-14 08:18:03,451 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 08:18:03,452 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2022-12-14 08:18:03,452 INFO L176 IcfgInterpreter]: Starting interpretation [2022-12-14 08:18:03,452 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2022-12-14 08:18:03,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:18:03,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:18:03,477 INFO L321 Elim1Store]: treesize reduction 37, result has 32.7 percent of original size [2022-12-14 08:18:03,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 34 [2022-12-14 08:18:03,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:18:03,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:18:03,506 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-12-14 08:18:03,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 53 [2022-12-14 08:18:03,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:18:03,522 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 28 [2022-12-14 08:18:03,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-14 08:18:03,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:03,571 INFO L321 Elim1Store]: treesize reduction 54, result has 28.0 percent of original size [2022-12-14 08:18:03,571 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 242 treesize of output 241 [2022-12-14 08:18:03,631 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 16 treesize of output 12 [2022-12-14 08:18:03,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:03,646 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 08:18:03,646 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2022-12-14 08:18:03,652 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:03,660 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 08:18:03,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2022-12-14 08:18:03,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:03,682 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 08:18:03,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2022-12-14 08:18:03,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-12-14 08:18:03,697 INFO L321 Elim1Store]: treesize reduction 18, result has 47.1 percent of original size [2022-12-14 08:18:03,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 33 [2022-12-14 08:18:03,926 INFO L180 IcfgInterpreter]: Interpretation finished [2022-12-14 08:18:20,921 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12931#(and (<= 100000 |ULTIMATE.start_main_~i~0#1|) (<= 0 |ULTIMATE.start_main_~#a~0#1.base|) (= |ULTIMATE.start_main_~#b~0#1.offset| 0) (= |ULTIMATE.start_main_~f~0#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| 0) (= |ULTIMATE.start_main_~#a~0#1.offset| 0) (= |ULTIMATE.start___VERIFIER_assert_~cond#1| |ULTIMATE.start___VERIFIER_assert_#in~cond#1|) (= |#NULL.offset| 0) (<= 0 |ULTIMATE.start_main_~#b~0#1.base|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2022-12-14 08:18:20,921 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2022-12-14 08:18:20,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 08:18:20,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 384 [2022-12-14 08:18:20,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584601313] [2022-12-14 08:18:20,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 08:18:20,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 385 states [2022-12-14 08:18:20,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 08:18:20,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 385 interpolants. [2022-12-14 08:18:20,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73934, Invalid=76998, Unknown=0, NotChecked=0, Total=150932 [2022-12-14 08:18:20,946 INFO L87 Difference]: Start difference. First operand 577 states and 579 transitions. Second operand has 385 states, 385 states have (on average 1.018181818181818) internal successors, (392), 384 states have internal predecessors, (392), 0 states have call successors, (0), 0 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 08:19:46,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 08:19:46,369 INFO L93 Difference]: Finished difference Result 1538 states and 2117 transitions. [2022-12-14 08:19:46,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2022-12-14 08:19:46,370 INFO L78 Accepts]: Start accepts. Automaton has has 385 states, 385 states have (on average 1.018181818181818) internal successors, (392), 384 states have internal predecessors, (392), 0 states have call successors, (0), 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 576 [2022-12-14 08:19:46,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 08:19:46,372 INFO L225 Difference]: With dead ends: 1538 [2022-12-14 08:19:46,372 INFO L226 Difference]: Without dead ends: 1153 [2022-12-14 08:19:46,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1918 GetRequests, 1340 SyntacticMatches, 191 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112495 ImplicationChecksByTransitivity, 51.6s TimeCoverageRelationStatistics Valid=73934, Invalid=76998, Unknown=0, NotChecked=0, Total=150932 [2022-12-14 08:19:46,379 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 1158 mSolverCounterSat, 5771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 6929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5771 IncrementalHoareTripleChecker+Valid, 1158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-12-14 08:19:46,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 6929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5771 Valid, 1158 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-12-14 08:19:46,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2022-12-14 08:19:46,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1153. [2022-12-14 08:19:46,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1152 states have (on average 1.0026041666666667) internal successors, (1155), 1152 states have internal predecessors, (1155), 0 states have call successors, (0), 0 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 08:19:46,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1155 transitions. [2022-12-14 08:19:46,407 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1155 transitions. Word has length 576 [2022-12-14 08:19:46,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 08:19:46,407 INFO L495 AbstractCegarLoop]: Abstraction has 1153 states and 1155 transitions. [2022-12-14 08:19:46,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 385 states, 385 states have (on average 1.018181818181818) internal successors, (392), 384 states have internal predecessors, (392), 0 states have call successors, (0), 0 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 08:19:46,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1155 transitions. [2022-12-14 08:19:46,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1153 [2022-12-14 08:19:46,430 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 08:19:46,430 INFO L195 NwaCegarLoop]: trace histogram [382, 382, 382, 1, 1, 1, 1, 1, 1] [2022-12-14 08:19:46,443 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 08:19:46,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-12-14 08:19:46,632 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-14 08:19:46,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 08:19:46,633 INFO L85 PathProgramCache]: Analyzing trace with hash -293318136, now seen corresponding path program 8 times [2022-12-14 08:19:46,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 08:19:46,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618944555] [2022-12-14 08:19:46,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 08:19:46,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 08:19:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 08:22:06,649 INFO L134 CoverageAnalysis]: Checked inductivity of 219459 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 146306 trivial. 0 not checked. [2022-12-14 08:22:06,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 08:22:06,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618944555] [2022-12-14 08:22:06,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618944555] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 08:22:06,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564321257] [2022-12-14 08:22:06,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 08:22:06,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 08:22:06,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 08:22:06,651 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 08:22:06,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d08c08a1-3964-4511-8113-3ef51a9a50d7/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process